Seven-day mean annual
low flow and mean
annual flow mapping of
the Waipara River
catchment, North
Canterbury
Report No. U08/10
ISBN 978-1-86937-779-3
Frank Scarf
October 2007
Report U08/10
ISBN 978-1-86937-779-3
58 Kilmore Street
PO Box 345
Christchurch 8140
Phone (03) 365 3828
Fax (03) 365 3194
75 Church Street
PO Box 550
Timaru 7940
Phone (03) 687 7800
Fax (03) 687 7808
Website: www.ecan.govt.nz
Customer Services Phone 0800 324 636
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
Executive Summary
Mean flow and seven-day mean annual low flows (MALF(7d)) have been estimated at sites on the
tributaries and mainstem of the Waipara River, North Canterbury. The work is based on a series of
concurrent flow gaugings carried out at various times dating back to 1988 when a permanent flow
recording site was established at White Gorge.
The flow statistics for each of the tributaries and mainstem sites were calculated using regression
equations, which were based upon a relationship with a primary flow site. The mean flow and MALF
(7d) estimates have been used to produce separate isohydal maps covering the Waipara River
catchment. The maps may be used to assess mean flow and MALF (7d) for any ungauged site within
the Waipara River catchment. The report also describes the makeup of surface water flow throughout
the catchment, including the contribution of spring flow emanating from the Omihi Stream.
As part of the larger project to map the MALF (7d) s and update the current mean flow map for the
entire Canterbury region, this report discusses the methods, results and limitations of the mapping of
7-day mean annual low flows and mean flows for the tributaries and mainstem of the Waipara River.
Environment Canterbury Technical Report
i
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
ii
Environment Canterbury Technical Report
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
Table of Contents
Executive Summary ...................................................................................................i
1
2
3
4
5
6
Introduction .....................................................................................................1
1.1
The study ........................................................................................................................1
1.2
Description of the Waipara River catchment ..................................................................1
1.3
Previous studies..............................................................................................................2
1.4
Hydrological data recording ............................................................................................2
Water use and impacts on hydrological data records .................................2
2.1
Consents issued to take water........................................................................................2
2.2
Method used to correct observed flow for upstream abstraction (naturalising flows) ....4
Calculating mean flow and mean annual low flow (MALF (7d)) for
principal sites..................................................................................................6
3.1
Mean flow........................................................................................................................6
3.2
Mean annual low flow MALF (7d) ...................................................................................6
Estimating mean flow and MALF (7d) at tertiary sites .................................8
4.1
Methodology ...................................................................................................................8
4.2
Limitations.......................................................................................................................8
4.3
Mean flow and MALF (7d) for tertiary sites.....................................................................9
Isohydal mapping of mean flow and MALF (7d) data.................................24
5.1
Mean flow......................................................................................................................24
5.2
Mean annual low flow ...................................................................................................24
5.3
Make-up of flow in the Waipara River under mean and low flow conditions ................24
Conclusions and Recommendations ..........................................................32
6.1
Conclusions ..................................................................................................................32
6.2
Recommendations ........................................................................................................32
7
Acknowledgements ......................................................................................33
8
References.....................................................................................................33
Appendix 1A: Listing of consented water takes from Waipara River and
unconfined groundwater ...................................................................34
Appendix 1B: Consented ground water takes considered not to be
hydraulically connected to surface water resources ......................37
Appendix 2A: Waipara River at White Gorge - Mean monthly flow (l/s)..............38
Appendix 2B: Waipara River at Teviotdale - Mean monthly flow (l/s) corrected
for abstraction upstream ...................................................................39
Environment Canterbury Technical Report
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Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
List of Figures
Figure 1-1:
Figure 2-1:
Figure 3-1:
Figure 4-1:
Figure 4-2:
Figure 4-3:
Figure 4-4:
Figure 4-5:
Figure 4-6:
Figure 4-7:
Figure 4-8:
Figure 4-9:
Figure 4-10:
Figure 4-11:
Figure 4-12:
Figure 4-13:
Figure 4-14:
Figure 4-15:
Figure 4-16:
Figure 5-1:
Figure 5-2:
Waipara River – Catchment boundaries, site locations and rainfall isohyets .................3
Proportion of authorised average take assumed to be exercised each month.................5
Correlation weekly mean flow – Waipara River at White Gorge versus Waipara River
at Teviotdale ......................................................................................................................7
Waipara River North Branch at Heathstock Road.............................................................9
Waipara River North Branch at Greys Road ...................................................................10
Tommys Stream at Heathstock Road .............................................................................10
Waipara River North Branch at Broxton Road Bridge.....................................................11
Waipara Middle Branch at MacDonald Downs Road ......................................................12
Waipara River South Branch at Karetu Downs ...............................................................12
Waipara River at Laidmore Road Bridge ........................................................................13
Boby Stream upstream from Waipara River confluence .................................................14
Waipara River at Stringers Bridge...................................................................................15
Weka Creek at Dam ........................................................................................................16
Archers Stream at 900 m upstream from dam ................................................................17
Waipara River upstream from Omihi Stream confluence................................................19
Omihi Stream at Waipara River confluence ....................................................................20
Waipara River downstream from Omihi confluence........................................................21
Smothering Gully Stream at State Highway 1.................................................................22
Home Creek at Kings Road.............................................................................................23
Waipara River Catchment – mean flow isohydal map ....................................................28
Waipara River Catchment – mean annual low flow (MALF (7d)) isohydal map .............29
List of Tables
Table 2.1:
Table 3.1:
Table 4.1:
Table 4.2:
Table 4.3:
Table 4.4:
Table 4.5:
Table 4.6:
Table 4.7:
Table 4.8:
Table 4.9:
Table 4.10:
Table 4.11:
Table 4.12:
Table 4.13:
Table 4.14:
Table 4.15:
Table 4.16:
Table 5.1:
Table 5.2:
Table 5.3:
iv
Waipara River – Method used to correct observed flow for upstream abstraction ...........5
Waipara River – Seven day low flow series ......................................................................7
Waipara River North Branch at Heathstock Road.............................................................9
Waipara River North Branch at Greys Road ...................................................................10
Tommys Stream at Heathstock Road .............................................................................10
Waipara River North Branch at Broxton Road Bridge.....................................................11
Waipara River Middle Branch at MacDonald Downs Road ............................................12
Waipara River South Branch at Karetu Downs ...............................................................12
Waipara River at Laidmore Road Bridge ........................................................................13
Boby Stream at Upstream Waipara Confluence .............................................................14
Waipara River at Stringers Bridge...................................................................................15
Weka Creek at Dam ........................................................................................................16
Archers Stream at 900 m upstream Dam........................................................................17
Waipara River at Upstream Omihi Stream Confluence...................................................19
Omihi Stream at Waipara River Confluence ...................................................................20
Waipara River at Downstream Omihi Stream Confluence ..............................................21
Smothering Gully Stream at State Highway 1.................................................................22
Home Creek at Kings Road.............................................................................................23
Waipara River – estimates of mean annual flow and MALF(7d) for sites included in
this analysis .....................................................................................................................27
Approximation of mean flow as provided through integration of the isohydal map ........30
Approximation of MALF (7d) as provided through integration of the isohydal map .......31
Environment Canterbury Technical Report
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
1
Introduction
1.1
The study
This report seeks to update:
a) the low flow statistics for the Waipara River and tributaries, presented by Chater (2002),
and
b) the Mean Annual Low Flow (7 day) (MALF (7d)) mapping contained in Chater (2003)
report.
It also examines the surface water make-up in detail and maps the mean flow and MALF (7d)
resources for the Waipara catchment.
Figure 1-1 shows the catchment boundary and location of flow recording and flow gauging sites
referred to in this study.
1.2
Description of the Waipara River catchment
From its headwaters to the sea, the Waipara River is some 60 km long and drains a catchment area of
approximately 726 km2. Altitude ranges from sea level up to 1116 m at The Brothers in the headwaters
of the Middle Branch. It is bounded by the Hurunui River catchment to the north and by the Ashley
River catchment to the south.
Lloyd (2002a) provides a comprehensive description of the Waipara River catchment. In summary, the
upper catchment above Stringers Road Bridge (area 410 km2) includes three main tributaries; namely
the North, Middle and South branches. These drain moderately sloping downlands to steep hill country
comprising greywacke and argillite overlain with medium to shallow soils. The North Branch emerges
from its upper gorge onto Masons Flat, an inland basin of about 10 km2. From there, the river
becomes more entrenched as it again enters downlands country where it is joined in turn by Tommys
Stream, the Middle Branch, and the South Branch before entering the Ohuriawa Gorge. The main flow
recording site at White Gorge (catchment area 370 km2) is located about 4 km downstream of this
gorge. Boby Stream joins the river between this point and Stringers Road Bridge where the river flows
out across a broad alluvial basin.
The lower catchment is dominated by an alluvial basin of about 160 km2 in area flanked by downlands
and hill country of sedimentary geology (limestone, sandstone, mudstone and conglomerate). The
soils in the basin area comprise a mixture of deep fertile clay loams and shallow stony silt loams.
Much of the lower catchment basin is drained by the Omihi Stream, which joins the Waipara River
about 9 km downstream from Stringers Bridge and 11 km from the coast.
The fertile soils within the basin support a diverse range of farming activity ranging from lifestyle blocks
to intensive pastoral farming, cropping and particularly viticulture. Vineyard expansion and increasing
annual harvest over recent years now puts Waipara as one of the recognised wine producing areas of
New Zealand.
Extensive pastoral farming and forestry dominate throughout the steeper downlands and hill areas that
surround the basin and valley floors.
Environment Canterbury Technical Report
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Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
1.3
Previous studies
A number of hydrological studies have been completed throughout the past 20 years. Horrell (1992)
report summarises the water resources of the Waipara River and neighbouring Kowai and Motunau
catchments based on records to that date. Sanders (1996 and 2000) detail annual water use
throughout Canterbury including the Waipara catchment. Chater (2002) summarises the surface water
hydrology while, Chater (2003) provides preliminary mapping of MALF (7d) for the catchment. Loris
(2000) and Lloyd (2002, a and b) detail the hydrogeology and groundwater availability within the
catchment.
1.4
Hydrological data recording
Flow has been recorded at White Gorge since February 1988. Flow has also been recorded at
Teviotdale about 6 km from the mouth, since April 2000. Unlike White Gorge the flow record at the
Teviotdale site is impacted by abstraction of water mainly for irrigation purposes occurring upstream
from the recording site. The extent of that abstraction is addressed in the following section.
2
Water use and impacts on hydrological data
records
2.1
Consents issued to take water
Up to this time, there has been no abstraction of water upstream from White Gorge. However,
consents to dam three unnamed small tributaries of the North Branch have recently been issued (Oct
and Nov 2006) to Greys Road Ltd, together with consents to take water from those storages for
irrigation purposes. Future hydrological analyses for the White Gorge site will need to consider the
impacts, if any, relating to this consent.
Appendix 1A summarises those consents authorised to take water from the Waipara River and its
tributaries and their associated unconfined (generally from wells less than 30 m deep) groundwater
resources. The summary partitions the consents to take from the river into four sections as follows:
a) between White Gorge and the Omihi Stream confluence,
b) from the Omihi Stream and its tributaries,
c) between the Omihi Stream confluence and Teviotdale, and
d) between Teviotdale and the sea.
Appendix 1B lists consents granted to take from deep groundwater. Exercise of these consents is
considered not to result in any immediate stream depletion effects on the surface water resources of
the Waipara catchment. This appendix is included in this report solely for completion.
Of interest are the low rates of take within this catchment compared to other catchments throughout
Canterbury. This is a reflection of the scarcity of water resources generally throughout the catchment.
Many of the irrigation consents authorised to date have been issued at low application rates of 0.02 to
0.38 l/s/ha associated with vineyard application. This is low by regional standards where 0.45 l/s/ha is
seen as being conservative.
Most takes are restricted to a daily or period (e.g. allowed to operate 8 days in any 14 day period)
volume limit. For this reason both appendices list the maximum rate of take and the average rate of
take. Some consents allow the holder to take more water in the winter period than during the more
water competitive summer season. Generally this is for frost protection and to allow the holder to divert
water into off river storage.
2
Environment Canterbury Technical Report
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North Canterbury
Figure 1-1:
Waipara River – Catchment boundaries, site locations and rainfall isohyets
Environment Canterbury Technical Report
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Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
The main points from Appendices 1A and 1B are summarised below:
a) Currently the total consented maximum rate of takes from surface water resources and
associated unconfined groundwater exercised within the Waipara River catchment for the
Waipara River above Omihi Stream confluence, excluding the water taken by the Weka
Scheme, is: 218 l/s in January to April; 150 l/s in May; 159 l/s in June to August; 146 l/s in
September and 224 l/s in October to December. The total consented average rate of takes
from surface water resources and associated unconfined groundwater exercised within this
reach of the Waipara River, excluding the water taken by the Weka Scheme, is: 186 l/s in
January to April; 117 l/s in May; 121 l/s in June to August; 107 l/s in September and 192 l/s in
October to December.
b) Currently the total consented maximum rate of takes from surface water resources and
associated unconfined groundwater exercised within the Waipara River catchment for Omihi
Stream above Waipara River confluence is: 166 l/s in May to September and 137 l/s in
October to April. The total consented average rate of takes from surface water resources and
associated unconfined groundwater exercised within the Omihi Stream catchment is: 114 l/s in
May to September and 69 l/s in October to April.
c) Currently the total consented maximum rate of takes from surface water resources and
associated unconfined groundwater exercised within the Waipara River catchment for the
Waipara River below the Omihi Stream confluence to Teviotdale is: 73 l/s in August to
November and 28 l/s in December to July. The total consented average rate of takes from
surface water resources and associated unconfined groundwater exercised within this reach
of the Waipara River; 39 l/s in August to November and 24 l/s in December to July.
d) In summer the average consented rate of take for all surface water and hydraulically
connected ground water takes in the Waipara catchment for the headwaters to the coast
currently is about 315 l/s.
e) In winter the average consented take is about 295 l/s but little of this is utilised other than by a
few consent holders who exercise a proportion of their consented take during periods of
higher river flows to fill local storages.
f) Currently the total consented average rate of takes from deep groundwater in the Waipara
catchment from the headwaters to the coast is about 536 l/s. However some consents were
issued based on projected well yields prior to drilling and whether those rates were finally
realised is doubtful.
The month-by-month columns in Appendix 1A represent the applied correction rates used in the
method to correct observed flows for upstream abstraction, which will be discussed in the following
section.
2.2
Method used to correct observed
abstraction (naturalising flows)
flow
for
upstream
Not all consents are exercised at the same time. Furthermore demand varies over time, generally
more water is taken in December to January than during the early spring months September and
October and the late autumn months of March and April. To correct the observed gaugings for those
sites affected, and most importantly the daily flows recorded at Teviotdale, it is necessary to make
some assumptions regarding the exercise of take consents throughout the year. This is outlined in
Table 2.1 and Figure 2-1.
In case of takes that are used for public water supply or stock water only, it is assumed that the intake
flow is continuous throughout the year. Therefore a constant rate is added back to the river flows.
When takes are used for irrigation purposes, based on experience and previous studies by Sanders
(1996), it was assumed that the actual take in September is about 25% of that authorised rising to
60% in the peak irrigation months December and January, and then reducing back to 25% in April. For
the winter months it is assumed only 5% of the authorised take is abstracted, this being mainly for
stock water and some filling of off-river storage ponds. Generally it is assumed that any water diverted
to a storage facility occurs mainly in winter and during times of high flow.
Environment Canterbury Technical Report
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Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
The month-by-month columns in Appendix 1A show the corrections applied to gauged and recorded
flows for the sites listed. When dealing with surface water abstractions, the correction amounts are
based on the average take rates. In case of ground water abstractions the estimated stream depletion
rates are used.
Table 2.1:
Waipara River – Method
used
to
correct
observed
flow
for
upstream abstraction
Month
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Proportion
of take*
0.05
0.05
0.25
0.35
0.50
0.60
0.60
0.55
0.45
0.25
0.05
0.05
Proportion of authorised take
During the summer of 2003/2004 compliance monitoring staff carried out a large scale monitoring
exercise in the Waipara catchment. All consented water abstractions that were current at that time
were monitored and measured. Some takes were continuously monitored, but most intakes and
pumps were visited once and the instantaneous abstraction rates measured. All of the abstraction
points could not be monitored on the same day, therefore the results obtained for the individual takes
do not represent identical conditions. Irrigation practices and water application rates vary spatially,
temporarily and with the method and system used. The results obtained from the one off monitoring
exercise could not be used in correcting observed flows, because they do not represent general
irrigation practices for all abstractors in the Waipara catchment over time.
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun
Figure 2-1:
Proportion of authorised average take
assumed to be exercised each month
*Proportion of average consented take
rate
5
Environment Canterbury Technical Report
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
3
Calculating mean flow and mean annual low
flow (MALF (7d)) for principal sites
3.1
Mean flow
3.1.1
Waipara River at White Gorge
Appendix 2A summarises the monthly mean flow for the Waipara River at White Gorge. Based on the
annual mean flows for the hydrological years 1988/89 to 2006/07, the mean flow at this site is 2790 l/s.
From the sample of 19 annual mean flow values there is a 95% probability that the normal flow at
White Gorge falls within the range 2790 +/- 480 l/s. Draining a catchment area of 370 km2, the 2790 l/s
translates to a specific discharge of 7.5 l/s/km2.
3.1.2
Waipara River at Teviotdale
The Teviotdale site has a much shorter flow record with only 7 complete hydrological years to June
2007. Observed daily mean flows were corrected for abstraction as outlined in section 2.2 and the
monthly mean and annual mean flow calculated. Those corrected values are shown in Appendix 2B.
Mean flow for that period has been 3490 l/s.
To obtain some measure of comparison between White Gorge and Teviotdale, the daily flow records
for the period of common record were examined. From 8 April 2000 through to 31 August 2007, the
flow at Teviotdale averaged 3440 l/s. For that same period the average flow at White Gorge was 2378
l/s. On a proportional basis this leads to the conclusion that the mean flow at Teviotdale for the past 19
years has been about 4035 l/s.
3.2
Mean annual low flow MALF (7d)
3.2.1
Waipara River at White Gorge
The daily flow record for the site was examined and the lowest moving average flow over 7
consecutive days in each water year noted. These data are shown listed in Table 3.1. The average
for the 19 water years of record to date has been 107 l/s. This is slightly lower to that reported by
Chater (2002).
3.2.2
Waipara River at Teviotdale
Annual minima for the Teviotdale site are also shown listed in Table 3.1. The MALF (7d) based on the
7 years of record to date is 313 l/s. For the period of common record, White Gorge over the past 7
years has an average of 110 l/s from which on a proportional basis it is assumed that the MALF (7d)
for Teviotdale is about 304 l/s.
To further check the low flow relationships between the two sites, average flow for each week
commencing 15 April through to 15 October each year were calculated for the period of common
record from 2000 to 2007. Only those pairs where the average flow for the week was less than 1000
l/s (~ median flow) at White Gorge were retained for subsequent correlation analysis. The decision to
limit the data to the April-October period was an attempt to minimise irrigation abstraction impacts as
they applied to the Teviotdale site data.
Correlating the data pairs (Figure 3-1) gave the regression equation:
Teviotdale = 1.3108 * White Gorge + 220.12
Inserting the MALF (7d) for White Gorge into this equation leads to the conclusion that MALF (7d) for
Teviotdale is about 360 l/s. However, looking at the bottom end of the range, it appears that the trend
line is riding high on the data pairs and from this it is considered that the 304 l/s previously concluded
as the MALF (7d) for this site is about right.
Inserting the mean flow for White Gorge (2790 l/s) into this equation leads to an estimated mean flow
for the Teviotdale site of 3877 l/s which is slightly lower than the 4035 l/s obtained previously.
Environment Canterbury Technical Report
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Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
Table 3.1:
Waipara River at Teviotdale - weekly average flow
during winter period 15 April - 15 October for the
years 2000/2001 to 2006/2007 (l/s)
Water
Year
1988/89
1989/90
1990/91
1991/92
1992/93
1993/94
1994/95
1995/96
1996/97
1997/98
1998/99
1999/00
2000/01
2001/02
2002/03
2003/04
2004/05
2005/06
2006/07
Average
Waipara River – Seven day low flow series
White Gorge
Min
flow
commencing
57
31-Dec-88
69
1-Feb-90
88
8-Feb-91
101
6-Mar-92
187
24-Jan-93
305
3-Mar-94
108
15-Feb-95
78
31-Jan-96
121
23-Dec-96
27
11-Feb-98
33
18-Feb-99
77
6-Mar-00
50
24-Mar-01
265
9-Jul-01
70
19-Mar-03
86
18-Jan-04
82
7-Feb-05
89
1-Feb-06
131
30-Mar-07
107
1800
Min
(obs)
flow
Teviotdale
Min
Correction (crt)
185
475
182
240
184
219
239
246
48
27
68
92
84
101
70
flow
commencing
222
505
251
334
268
321
292
313
29-Apr-01
9-Jul-01
21-Mar-03
19-Jan-04
27-Feb-05
30-Jan-06
31-Mar-07
y = 1.3108x + 220.12
R2 = 0.91
SE of equation= 98.6
1600
1400
1200
1000
800
600
400
200
0
0
200
400
600
800
1000
1200
Waipara River at White Gorge - weekly average flow during winter period 15 April - 15
October for the years 2000/2001 to 2006/2007 (l/s)
Figure 3-1:
7
Correlation weekly mean flow – Waipara River at White Gorge versus Waipara
River at Teviotdale
Environment Canterbury Technical Report
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
4
Estimating mean flow and MALF (7d) at tertiary
sites
4.1
Methodology
To estimate the mean flow and MALF (7d) for sites other than the primary sites (long-term recorder
sites), it is common practice to carry out a series of concurrent gaugings at the site followed by
standard regression analyses to establish a relationship between that tertiary (spot gauging site) site
and the nearest primary site. The regression equation is then used to estimate the mean flow and
MALF (7d) values for the tertiary site. Generally throughout this study, the Waipara River at White
Gorge was used as the primary site.
Flow gaugings at various locations on the Waipara River and its tributaries have been carried out
since March 1969. Earlier gaugings were often carried out at the nearest accessible site for the stream
of interest and for that reason the numbers of gaugings are limited to only one or two measurements.
In later years the demand for increased understanding of, in particular, the low flow resources of the
catchment, has resulted in gaugings being carried out at permanent tertiary flow sites located in the
main river near the confluence of the mainstem and tributaries.
In all, gaugings have been undertaken at 81 different locations (excluding White Gorge and
Teviotdale) within the catchment, of these only 27 sites have had 7 or more measurements. For the
final analyses, the data for 16 sites were used, the remaining 11 being discarded for one or more of
the following reasons:
a) all or most of the gaugings were carried out prior to February 1988 and the establishment of
the White Gorge recorder site;
b) there was a nearby site with more gaugings on the same stream; or
c) there were a number of zero flow observations within the data set.
4.2
Limitations
4.2.1
Gauging accuracy where flows are less than 20 l/s
The Waipara catchment is noted for its scarcity of natural water resources. During late summer and
autumn, many of the tributaries exhibit little or no flow with flows less than 20 l/s being the norm for
these streams.
Within a natural stream environment and using standard Pygmy and Ott type current meters, it is
extremely difficult, to the extent of being nigh impossible, to measure such flows within acceptable
accuracy expectations, generally regarded as +/- 8%. The depth and velocities encountered under
such flow conditions are often outside the range of depth and velocities used to calibrate the meter.
Irregularities in bed and bank surfaces within the wetted perimeter and immediately upstream assume
higher significance and because of the dimensions of the current meter it is impractical to undertake
velocity measurements within the usual 17-20 verticals expected without overlap and duplication.
Gauging accuracy is often further compromised by the integrity of the site with at least a portion
occurring as non-measurable subsurface flow. Generally measurements undertaken in such
circumstance tend to underestimate the flow. Caution should be used when flows are in this range.
4.2.2
Correlation accuracy at higher flows
Low flow conditions, by and large, tend to be relatively universal throughout the catchment. Generally
the whole catchment has undergone a period of little or no rainfall for some time, and the low flow
measured at any particular tertiary site is reflected in the low flow recorded concurrently in adjacent
catchments and at the primary site.
In establishing a relationship linking the two sites there is an inherent presumption that when the flow
at the primary site is at or about MALF(7d), then the flow at the tertiary site is also at or about
Environment Canterbury Technical Report
8
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
MALF(7d). In studies such as these, it is common to undertake a series of concurrent gaugings
covering a range of flows extending from less than MALF (7d) up to about mean flow as recorded at
the primary site. However in progressing from low to median and to mean flow conditions, the stability
between data pairs becomes increasingly less reliable. This occurs due to the timing and spatial
distribution of recent rainfall events and with that the timing and magnitude of stream or river flow
reflected at both the tertiary and primary sites. A number of higher concurrent flows have been
removed, and are listed.
4.3
Mean flow and MALF (7d) for tertiary sites
4.3.1
Waipara River North Branch and Tommys Stream
The Waipara River North Branch drains the southern slopes of the Cavendish Hills and the northern
slopes of Double Tops both ranging up to about 850 m in altitude. Tommys Stream drains the
southern faces of Double Tops. On emergence from its upper gorge, the North Branch flows out onto
a broad basin known as Masons Flat. From there it continues for about 8 km through to Greys Road
where the river again becomes more incised.
Looking at the gaugings data it appears there is some loss from surface water to the surrounding
streambed through this section. At Greys Road (Table 4.2) the specific discharge estimate for mean
flow shows 3.3 l/s/km2; well down on that for the Heathstock Road site (Table 4.1) where the specific
discharge is 6.7 l/s/km2. Tommys Stream (Table 4.3) at 5.8 l/s/km2 appears consistent with the North
Branch at Heathstock Road recognising that it drains an area of slightly lower altitude. At Broxton
Road (Table 4.4), below its confluence with Tommys Stream the specific discharge is 4.8 l/s/km2
indicating a partial recovery of flow between Greys Road and the confluence with Tommys Stream.
It should be noted that these results are based on limited data, MALF(7d) and mean flow conditions
are outside of the measured range and therefore the uncertainties are large.
Waipara River North
Branch at Heathstock
Road
Catchment area 47.2 km2
Waipara
Waipara Nth
Date
White GorgeHeathstock
21-May-91
53
574
28-May-91
53
478
12-Jul-91
257
2395
16-Jul-91
200
1388
29-Sep-01
647
53
25-Jan-01
1
129
300
Waipara River North Branch at
Heathstock Road (l/s)
Table 4.1:
y = 0.1136x
R2 = 0.98
250
200
150
100
50
0
0
30-Apr-91
11-Jun-91
Flow (l/s)
sp discharge
35183*
5017*
5292*
367*
MALF(7d) mean flow
12.2
317
0.3
6.7
500
1000
1500
2000
2500
3000
Waipara River at White Gorge (l/s)
Figure 4-1:
Waipara River North
Heathstock Road
Branch
at
Note:*
observations
considered
outliers and not used for
correlation.
White Gorge flows in bold are gauged
flows, while remainder are Daily Mean
flows.
9
Environment Canterbury Technical Report
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
Waipara River North
Branch at Greys Road
Catchment area 99.4 km2
Waipara
Waipara Nth
Date
White GorgeGreys Road
21-May-91
71
574
28-May-91
51
478
12-Jul-91
283
2395
16-Jul-91
173
1388
29-Sep-01
647
72
30-Apr-91
11-Jun-91
35183*
5017*
4332*
423*
300
Waipara River North Branch at Greys
Road (l/s)
Table 4.2:
y = 0.1192x
R2 = 0.99
250
200
150
100
50
0
0
500
1000
1500
2000
2500
3000
Waipara River at White Gorge (l/s)
MALF(7d) mean flow
flow (l/s)
12.8
333
sp discharge
0.1
3.3
Figure 4-2:
Note:*
observations
considered
outliers and not used for
correlation.
White Gorge flows in bold are gauged
flows, while remainder are Daily Mean
flows.
Tommys Stream
Heathstock Road
at
Catchment area 32.3 km2
Waipara
Tommys St
Date
White Gorge Heathstock
21-May-91
43
574
28-May-91
31
478
12-Jul-91
161
2395
16-Jul-91
91
1388
29-Sep-01
647
36
30-Apr-91
11-Jun-91
35183*
5017*
1690*
203*
MALF(7d) mean flow
flow (l/s)
7.1
186
sp discharge
0.2
5.8
Note:*
observations
outliers and
correlation.
not
Tommys Stream at Heathstock Road (l/s)
Table 4.3:
Waipara River North Branch at Greys
Road
180
y = 0.0665x
R2 = 0.99
160
140
120
100
80
60
40
20
0
0
500
1000
1500
2000
2500
3000
Waipara River at White Gorge (l/s)
Figure 4-3:
Tommys Stream at Heathstock Road
considered
used for
White Gorge flows in bold are gauged
flows, while remainder are Daily Mean
flows.
Environment Canterbury Technical Report
10
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
Waipara River North
Branch at Broxton
Road Bridge
Catchment area 151 km2
Waipara
Waipara Nth
Date
White Gorge Broxton Rd
21-May-91
132
574
12-Jul-91
642
2395
16-Jul-91
358
1388
29-Sep-01
647
110
11-Jun-91
29-Apr-91
987*
5017*
132*
635*
Waipara North Branch at Broxton Road
Bridge (l/s)
Table 4.4:
700
y = 0.2594x
R2 = 0.99
600
500
400
300
200
100
0
0
500
1000
1500
2000
2500
3000
Waipara River at White Gorge (l/s)
flow (l/s)
sp discharge
Note:*
MALF(7d) mean flow
27.8
723.7
0.2
4.8
observations
outliers and
correlation.
not
Figure 4-4:
Waipara River North Branch at
Broxton Road Bridge
considered
used for
White Gorge flows in bold are gauged
flows, while remainder are Daily Mean
flows.
4.3.2
Waipara River Middle Branch and Waipara River South Branch
The Middle Branch drains the eastern slopes of The Brothers, approximately 1000 m altitude. At its
junction with the Waipara mainstem, this tributary (Table 4.5) exhibits an estimated specific discharge
of 7.7 l/s/km2 for mean flows.
Bordering the Middle Branch to the south is the South Branch, which drains the southern slopes of the
Brothers and the eastern slopes of the Okuku Range. The median elevation for this catchment is
higher than that for the Middle Branch. At its junction with the Waipara mainstem just above the
Ohuriawa Gorge, the specific discharge for the South Branch (Table 4.6) mean flow is estimated to be
9.4 l/s/km2.
During the period 1998-2001, a number of gaugings were carried out at the Laidmore Road Bridge,
which is located immediately below the Ohuriawa Gorge and about 3.5 km upstream from the White
Gorge recorder site. The mean flow at this site (Table 4.7) is assessed to be 2559 l/s with a specific
discharge of 7.6 l/s/km2.
11
Environment Canterbury Technical Report
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North
Canterbury
Waipara River Middle
Branch at MacDonald
Downs Road
Catchment area 58.8 km2
Waipara
Waipara Mid
Date
White Gorge MacDonald
29-Apr-91
987
175
21-May-91
112
574
28-May-91
98
478
12-Jul-91
398
2395
16-Jul-91
176
1388
25-Jan-01
23
129
5-Apr-01
12
71
29-Sep-01
647
105
11-Jun-91
flow (l/s)
sp discharge
Note:*
5017*
642*
450
Waipara River Middle Branch at
MacDonald Downs Road (l/s)
Table 4.5:
y = 0.1612x
R2 = 0.97
400
350
300
250
200
150
100
50
0
0
500
Figure 4-5:
MALF(7d) mean flow
17.2
449.7
0.3
7.7
observations
outliers and
correlation
not
1000
1500
2000
2500
3000
Waipara
Middle
Branch
MacDonald Downs Road
at
Waipara River at White Gorge (l/s)
considered
used for
White Gorge flows in bold are gauged
flows, while remainder are Daily Mean
flows.
Waipara River South
Branch
at
Karetu
Downs
Catchment area 113 km2
Waipara
Waipara Sth
Date
White
Karetu
Gorge
Downs
29-Apr-91
987
376
21-May-91
240
574
28-May-91
155
478
12-Jul-91
915
2395
16-Jul-91
508
1388
11-Jun-91
5017*
2445*
1000
Waipara River South Branch at Karetu
Downs (l/s)
Table 4.6:
y = 0.3784x
R2 = 0.99
900
800
700
600
500
400
300
200
100
0
0
500
1000
1500
2000
2500
3000
Waipara River at White Gorge (l/s)
flow (l/s)
sp discharge
Note:*
MALF(7d) mean flow
40.5
1055.7
0.4
9.4
observations
outliers and
correlation.
not
Figure 4-6:
Waipara River South Branch at
Karetu Downs
considered
used for
White Gorge flows in bold are gauged
flows, while remainder are Daily Mean
flows.
Environment Canterbury Technical Report
12
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
Waipara
River
at
Laidmore Road Bridge
Catchment area 347 km2
Waipara
Waipara
Date
White GorgeLaidmore
21-Sep-98
1158
714
14-Dec-98
239
196
25-Mar-99
1829
1916
13-Sep-99
1132
988
6-Dec-99
1669
1547
21-Mar-00
1024
627
8-Nov-00
1254
936
25-Jan-01
67
129
5-Feb-01
50
60
5-Mar-01
62
15
5-Apr-01
42
71
5-Jun-01
164
126
30-Sep-01
403
426
28-Jun-99
21-Jun-00
5-Dec-00
flow (l/s)
sp discharge
Note:*
2395*
2760*
820*
1251*
1947*
351*
Waipara River at Laidmore Road Bridge
(l/s)
Table 4.7:
2500
y = 0.9172x
R2 = 0.96
2000
1500
1000
500
0
0
500
1000
1500
2000
Waipara River at White Gorge (l/s)
Figure 4-7:
Waipara River at Laidmore Road
Bridge
MALF(7d) mean flow
98.1
2559.0
0.3
7.3
observations considered outliers
and not used for correlation
White Gorge flows in bold are gauged flows,
while remainder are Daily Mean flows
4.3.3
Boby Stream
Boby Stream drains the lower slopes of Mount Grey. The gaugings data (Table 4.8) tends to suggest
the existence of a small spring of about 15-20 l/s, possibly at or immediately upstream from its
confluence with the Waipara River. In saying this, there is a great deal of uncertainty surrounding the
correlation with only one of the 8 measurements in the mid flow range. There are no gaugings in
Boby’s Stream even close to mean flow conditions and therefore the mean flow has not been
estimated here.
13
Environment Canterbury Technical Report
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North
Canterbury
Boby Stream at Upstream
Waipara Confluence
Catchment area 25.3 km2
Waipara
Boby Str
Date
White Gorgeu/s Waipara
18-Jan-01
22
139
30-Sep-01
47
426
10-Jan-03
133
29
23-Jan-03
26
168
13-Feb-03
18
122
19-Feb-03
13
99
27-Feb-03
18
138
27-Mar-07
20
127
Boby Stream at upstream Waipara River
confluence (l/s)
Table 4.8:
60
y = 0.0921x + 8.5518
R2 = 0.86
50
40
30
20
10
0
0
100
200
300
400
500
Waipara River at White Gorge (l/s)
flow (l/s)
sp discharge
MALF(7d) mean flow
18.4
NA
0.7
Figure 4-8:
Boby Stream upstream from Waipara
River confluence
Note: White Gorge flows in bold are gauged
flows, while remainder are Daily Mean flows.
4.3.4
Waipara River at Stringers Bridge
Prior to the establishment of the White Gorge recorder site the Stringers Bridge was widely used for
monitoring low flows on the Waipara River. Regular gaugings at this site (Table 4.9) have continued
through to the present day. From the regression analysis the mean flow at Stringers Road Bridge is
assessed to be 3257 l/s and a specific discharge of 7.9 l/s/km2.
Environment Canterbury Technical Report
14
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
Waipara
Bridge
River
at
Stringers
Catchment area 410 km2
Waipara
Waipara Waipara Stringers
Date
White
Gorge Stringers Corrected #
23-Mar-88
172
172
146
20-Apr-88
165
221
221
4-May-88
265
265
217
9-Jun-88
778
778
688
2-Feb-90
92
92
74
16-Feb-90
233
233
177
28-Mar-90
468
468
329
29-Apr-91
987
846
846
21-May-91
676
676
574
28-May-91
538
538
478
12-Jul-91
2570
2570
2395
16-Jul-91
1656
1656
1388
13-Dec-91
1607
2030
2030
11-Feb-92
262
243
243
28-Nov-97
213
224
199
16-Dec-97
179
192
146
8-Jan-98
107
120
80
16-Jan-98
65
78
50
27-Jan-98
68
68
43
10-Feb-98
43
43
33
27-Feb-98
48
48
29
21-Sep-98
1158
1154
1160
14-Dec-98
239
256
269
28-Dec-98
122
135
110
12-Jan-99
61
74
51
26-Jan-99
39
41
41
12-Feb-99
43
43
48
13-Sep-99
1132
1323
1329
6-Dec-99
1669
2196
2210
29-Sep-00
2990
3607
3613
18-Jan-01
150
164
139
21-Feb-01
74
117
130
23-Feb-01
88
101
65
5-Mar-01
62
68
78
13-Mar-01
59
107
117
2-Apr-01
99
105
53
15
Waipara
Waipara Waipara Stringers
Date
White
Gorge Stringers Corrected #
19-Apr-01
71
97
103
5-Jun-01
164
147
148
5-Oct-01
489
375
383
5-Feb-03
188
226
239
26-Mar-03
71
86
96
9-Jan-04
122
127
141
9-Feb-05
81
129
142
12-Apr-06
405
411
261
11-Jun-91
25-Mar-99
28-Jun-99
21-Mar-00
21-Jun-00
8-Nov-00
5-Dec-00
5017*
1418*
2395*
627*
2789*
1254*
820*
MALF(7
d)
flow (l/s)
124.9
sp discharge 0.3
4804
2846
2229
1353
2167
840
512
4804
2856
2230
1363
2168
852
526
mean
flow
3256.5
7.9
Note:* observations considered outliers and not
used for correlation
White Gorge flows in bold are gauged flows, while
remainder are Daily Mean flows.
# corrected for upstream abstraction
4000
Waipara River at Stringers Bridge (l/s)
Table 4.9:
y = 1.1672x
R2 = 0.99
3500
3000
2500
2000
1500
1000
500
0
0
500
1000
1500
2000
2500
3000
3500
Waipara River at White Gorge (l/s)
Figure 4-9:
Waipara River at Stringers
Bridge
Environment Canterbury Technical Report
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North
Canterbury
4.3.5
Weka Creek and Archers Stream
Weka Creek drains the eastern slopes of Doctors Hills while Archers Stream drains a less elevated
area east of the Weka catchment. The Weka Creek gaugings (Table 4.10) do not correlate well with
White Gorge, notwithstanding discarding four gaugings considered to be outliers. This is not
unexpected. The gauging site is below the Weka Dam structure and therefore represents augmented
flows, especially under low flow conditions. The scheme is required to release a flow of at least 18 l/s
from the storage dam at all times. At best the mean and low flow estimates for this catchment are little
more than an educated guess and as a result data should be treated with caution.
Archers Stream (Table 4.11) fares better. However it is noted that many of the measurements on
Archers involve flows less than 20 l/s and are likely of low accuracy.
Weka Creek at Dam
Catchment area 41.1 km2
Waipara
Weka
Date
White Gorge dam
21-Feb-01
74
3-Apr-01
74
5-Jan-04
91
24-Mar-04
253
12-Apr-06
260
23-Dec-92
28-Sep-00
15-Jan-01
16-Jan-03
flow (l/s)
sp discharge
1447*
3214*
149*
712*
35
y = 0.054x + 11.018
R2 = 0.70
30
18
15
12.5
28.6
21.6
15
658
30
23
MALF(7d) mean flow
16.8
161.7
0.4
3.9
Weka Creek at dam (l/s)
Table 4.10:
25
20
15
10
5
0
0
50
100
150
200
250
300
Waipara River at White Gorge (l/s)
Figure 4-10: Weka Creek at Dam
Note:* observations considered outliers
and not used for correlation.
White Gorge flows in bold are gauged
flows, while remainder are Daily Mean
flows.
Environment Canterbury Technical Report
16
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
Archers Stream at 900
m upstream Dam
Catchment area 14.7km2
Waipara
Archers
Date
White Gorge u/s dam
27-Feb-03
3
138
24-Sep-04
15.6
1326
5-Nov-04
7.4
760
18-Nov-04
6.1
316
9-Sep-04
2981
43.4
28-Jan-05
3.1
147
2-Mar-05
3.1
81
50
Archers Stream at upstream dam (l/s)
Table 4.11:
y = 0.014x
R2 = 0.99
45
40
35
30
25
20
15
10
5
0
0
500
1000
1500
2000
2500
3000
3500
Waipara River at White Gorge (l/s)
21-Oct-04
10-Dec-04
16-Nov-05
2068*
557*
730*
18.5
4.8
3.6
Figure 4-11:
Archers Stream at 900 m upstream
from dam
MALF(7d) mean flow
flow (l/s)
1.5
39.1
sp discharge
0.1
2.8
Note:*
observations considered outliers
and not used for correlation
White Gorge flows in bold are gauged
flows, while remainder are Daily Mean
flows.
4.3.6
Omihi Stream and Waipara River above and below Omihi Stream confluence
The hydrogeology of the Waipara Alluvial Basin is described in detail by Lloyd (2002b). Moving
clockwise, the Basin covers about 120 km2 and is bounded by Doctors Hills in the headwaters of
Weka Creek, Mount Macdonald within Home Creek catchment, and Moores Hill South, Centre Hill and
Mount Cass along the northern and eastern margins of the Omihi Stream catchment.
Lloyd (2002b) describes the Tertiary sedimentary formations surrounding the basin and the more
recent gravels that form the central part of the basin. He notes the presence of numerous sinkholes
and springs within the Tertiary beds together with surface water losses to groundwater where rivers
and streams cross those beds. Together with rainfall infiltration, these stream flow losses recharge the
underlying aquifers within the basin. He estimates that annual recharge from rainfall averages about
12.6 million cubic meters per year while that from stream flow loss is around 3.9 million cubic metres
per year. The latter equates to a constant flow of about 120 l/s.
Streamflow gauging throughout the Omihi catchment is notable for its paucity of any visible surface
flow. The only time any flow is observed in the upper catchment tributaries is during periods of intense
2
rainfall events that might occur only 4-5 times per year. At Baxters Road (catchment area 92.5 km )
the Omihi Stream is dry for much of the year irrespective of variable flows within the neighbouring
Waipara River above the Omihi confluence.
Springs within or close to the Omihi Stream occur in the lower reaches of the system, downstream of
SH1. These contribute a small flow until a point about 500 m upstream from Glen Ray (map reference
N34: 915-940) where a number of springs through to below Glen Ray progressively increases the flow
in the Omihi Stream from less than 50 l/s to more than 150 l/s even in the driest part of the year.
17
Environment Canterbury Technical Report
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North
Canterbury
Correlating the flows observed in the Omihi Stream at the Waipara River confluence (catchment area
176 km2) with flows recorded concurrently at White Gorge (Table 4.13) was not particularly successful.
This is not surprising given the lag time that typically occurs between groundwater recharge whether it
be from rainfall seepage or streamflow loss, the attenuation of those recharge events, and ultimate reemergence as spring flow. That lag is likely to be measured in weeks as opposed to immediate as is
generally assumed when using these low and mean flow mapping techniques.
The flow duration for the Omihi Stream likely bears little resemblance to that for the neighbouring
Waipara. Where the mean flow is exceeded for about 23% of the time in the Waipara River, the
corresponding figure for the Omihi Stream upper catchment is likely to be much lower than this,
possibly as low as 10%. In other words flood and fresh events still occur but are dampened by losses
to groundwater recharge.
The only conclusion that might safely be drawn from the regression analysis is that MALF (7d) for the
Omihi Stream at the Waipara River confluence is about 150 l/s.
For the Waipara River immediately upstream of the Omihi Stream confluence, for the gauging site
above the Omihi Stream confluence (Table 4.12) the regression analysis indicates the mean flow for
this site is about 3295 l/s. The mean flow estimate for the site below the Omihi confluence (Table 4.14)
is 3844 l/s. This would suggest that the mean flow of the Omihi Stream is about 550 l/s as opposed to
the 312 l/s obtained from the less than adequate correlation (Figure 4-13).
The regression equation for the site below the Omihi confluence indicates that the MALF(7d) for this
site is about 300 l/s. Adding the MALF(7d) estimates for the Omihi Stream and Waipara River
upstream of their confluence, suggests that MALF(7d) for the site below the Omihi confluence should
be around 280 l/s. This estimate is consistent with the Teviotdale estimate of 307 l/s recognising the
2
difference in catchment area is only 25 km . However concurrent gaugings between Waipara at
downstream Omihi confluence and Teviotdale suggest a gain in flow between these two sites. The
difference in flow varies between low and high flow conditions from 0 l/s to over 1000 l/s.
Environment Canterbury Technical Report
18
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
Table 4.12:
Waipara River at Upstream
Omihi Stream Confluence
Catchment area 515 km2
18-Jan-01
2-Apr-01
11-Dec-03
15-Jan-04
17-Feb-04
17-Mar-04
23-Apr-04
27-May04
24-Jun-04
20-Jul-04
25-Aug-04
24-Sep-04
3-Nov-04
12-Jan-05
2-Feb-05
2-Mar-05
24-Mar-05
14-Mar-06
12-Apr-06
29-Sep-00
flow (l/s)
sp
discharge
Waipara
White
Gorge
139
53
291
101
2103
411
545
Waipara
u/str
Omihi
137
35
316
54
2267
408
622
2847
2235
1455
4156
1326
1007
911
109
81
112
95
261
3550
2407
1553
5035
1369
1147
1171
76
56
126
92
337
3554
2412
1559
5040
1388
1203
1235
135
105
175
141
364
2990*
4495
4533
MALF(7
d)
126.4
mean
flow
3295.0
0.2
6.4
6000
Waipara River at upstream Omihi Stream
confluence (l/s)
Date
Waipar
a
u/s
Omihi
corrected
#
201
53
384
118
2336
457
649
y = 1.181x
R2 = 1.00
5000
4000
3000
2000
1000
0
0
1000
2000
3000
4000
Waipara River at White Gorge (l/s)
Figure 4-12: Waipara River upstream from
Omihi Stream confluence
Note:*
observations considered outliers and not
used for correlation.
White Gorge flows in bold are gauged flows, while
remainder are Daily Mean flows.
# Corrected for upstream abstraction.
19
Environment Canterbury Technical Report
5000
Seven day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North
Canterbury
Table 4.13:
Omihi Stream at
River Confluence
Waipara
Catchment area 176 km2
4-Oct-88
20-Dec-89
11-Dec-03
15-Jan-04
17-Feb-04
17-Mar-04
24-Mar-04
23-Apr-04
27-May-04
24-Jun-04
20-Jul-04
26-Aug-04
9-Sep-04
24-Sep-04
21-Oct-04
3-Nov-04
5-Nov-04
12-Jan-05
2-Feb-05
24-Mar-05
7-Jul-05
12-Apr-06
30-Aug-06
18-Oct-06
16-Nov-06
20-Dec-06
Waipara
Whitegorge
734
1220
291
101
2103
411
253
545
2847
2235
1455
3472
2981
1326
2068
1007
760
911
109
124
500
261
1827
2017
1336
1920
23-Jan-07
8-Mar-07
27-Mar-07
519
168
127
flow (l/s)
sp
discharge
122
96
85
y = 0.0581x + 149.72
R2 = 0.45
400
350
300
250
200
150
100
50
0
0
1000
2000
3000
4000
Waipara River at White Gorge (l/s)
Figure 4-13: Omihi Stream at Waipara River
confluence
150
107
95
MALF(7d)
155.9
mean
flow
311.8 (refer text)
0.9
1.8 (refer text)
Note:
# Corrected for upstream abstraction
Note:
White Gorge flows in bold are gauged
flows, while remainder are Daily Mean
flows.
Environment Canterbury Technical Report
450
Omihi Stream at Waipara River
confluence (l/s)
Date
Omihi at
Waipara
Omihi at
confluence
Waipara
Confluence corrected #
140
182
154
352
227
235
136
151
168
181
169
183
139
153
166
173
260
267
205
212
228
235
395
402
348
382
322
356
335
358
261
295
215
249
208
220
150
161
132
142
180
187
125
136
190
196
143
167
141
165
175
203
20
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
Table 4.14:
Waipara River at Downstream
Omihi Stream Confluence
Catchment area 691 km2
Waipara
Whitegorge
199
146
80
50
43
33
29
1158
239
51
48
1829
2395
1132
1508
627
2789
4223
3944
1254
656
131
65
62
74
164
109
Waipara
d/str
Omihi
385
261
157
154
129
94
90
1169
341
134
44
953
2120
1462
2359
1366
2513
7397
5440
1338
601
300
205
141
191
361
237
MALF(7d)
flow (l/s)
299.8
sp discharge
0.4
mean
flow
3843.8
5.6
28-Nov-97
16-Dec-97
8-Jan-98
16-Jan-98
27-Jan-98
10-Feb-98
27-Feb-98
21-Sep-98
14-Dec-98
12-Jan-99
12-Feb-99
25-Mar-99
28-Jun-99
13-Sep-99
6-Dec-99
21-Mar-00
21-Jun-00
4-Oct-00
6-Oct-00
8-Nov-00
5-Dec-00
19-Jan-01
23-Feb-01
5-Mar-01
3-Apr-01
5-Jun-01
2-Feb-05
8000
Waipara River at d/s Omihi Stream
confluence (l/s)
Date
Waipara
at d/s
Omihi
conf
corrected
#
612
531
423
420
350
298
294
1297
611
375
248
1166
2156
1590
2644
1580
2549
7561
5604
1570
878
436
330
244
251
389
307
y = 1.3209x + 158.49
R2 = 0.88
7000
6000
5000
4000
3000
2000
1000
0
0
1000
2000
3000
4000
Waipara River at White Gorge (l/s)
Figure 4-14: Waipara River downstream
from Omihi confluence
Note # Corrected for upstream abstraction.
White Gorge flows in bold are gauged flows, while
remainder are Daily Mean flows.
21
Environment Canterbury Technical Report
5000
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North
Canterbury
4.3.7
Smothering Gully Stream and Home Creek
Smothering Gully and Home Creek are tributaries of Omihi Stream, and are notable in as much that
both have some surface water flow throughout the year, albeit minimal.
Smothering Gully Stream (catchment area 5.5 km2) drains the western slopes of Totara and noting
that all of the flows measured at this site are less than 20 l/s, the mean flow of this stream (Table 4.15)
is assessed to be 21 l/s and a specific discharge of 3.8 l/s/km2.
Correlating Home Creek gaugings (Table 4.16) with concurrent flows observed at White Gorge
suggests that the mean flow for this Omihi Stream tributary is about 126 l/s. The creek appears to
receive some 20-25 l/s of spring flow.
Smothering
Stream
at
Highway 1
Gully
State
Catchment area 5.5 km2
Waipara
Smothering
Date
White Gorge SH1
4-Apr-01
73
4
10-Jan-03
133
2
30-Jan-03
2
386
15-Apr-03
1434
7.8
9-Sep-03
13.4
1357
8-Mar-07
0.1
168
2-Apr-03
4383*
8
16
Smothering Gully Stream at SH1 (l/s)
Table 4.15:
y = 0.0075x
R2 = 0.87
14
12
10
8
6
4
2
0
0
500
1000
1500
2000
Waipara River at White Gorge (l/s)
flow (l/s)
sp discharge
MALF(7d) mean flow
0.8
20.9
0.1
3.8
Figure 4-15: Smothering Gully Stream at State
Highway 1
Note:*
observations
considered
outliers and not used for
correlation.
White Gorge flows in bold are gauged
flows, while remainder are Daily Mean
flows.
Environment Canterbury Technical Report
22
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
Table 4.16:
Home Creek at Kings Road
Date
4-Oct-88
20-Dec-89
22-Dec-98
16-Jan-01
13-Mar-01
3-Apr-01
10-Jan-03
23-Jan-03
13-Feb-03
19-Feb-03
24-Mar-04
9-Sep-04
24-Sep-04
21-Oct-04
17-Dec-04
9-Feb-05
12-Apr-06
30-Aug-06
18-Oct-06
16-Nov-06
23-Jan-07
8-Mar-07
27-Mar-07
10-Oct-00
5-Nov-04
20-Dec-06
flow (l/s)
sp
discharge
Waipara
Home Cr
White
gorge
Kings Rd
734
33
37
1220
196
21
21
146
59
46
74
36
133
22
20
168
22
122
20
99
253
44
2981
98
88
1326
64
2068
3161
168
81
32
20
261
1827
69
56
2017
36
1336
18
519
20
168
22
127
5221*
713*
2052*
85
0
20
MALF(7d)
28.6
mean
flow
126.3
0.8
3.5
Home Cr
at Kings
Road
Bdge
corrected
#
45
91
42
42
62
45
24
22
24
22
46
113
103
85
204
34
22
72
57
38
21
22
24
Home Creek at Kings Road Bridge (l/s)
Catchment area 35.9 km2
250
y = 0.0364x + 24.747
R2 = 0.69
200
150
100
50
0
0
500
1000
1500
2000
2500
3000
Waipara River at White Gorge (l/s)
Figure 4-16: Home Creek at Kings Road
117
0
23
Note:*
observations considered outliers and not
used for correlation.
White Gorge flows in bold are gauged flows, while
remainder are Daily Mean flows.
23
Environment Canterbury Technical Report
3500
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North
Canterbury
5
Isohydal mapping of mean flow and MALF (7d)
data
Table 5.1 summarises for each of the 16 tertiary sites used in the study, the estimates of mean flow
and MALF(7d) obtained from the correlation analyses. The specific discharge values for MALF(7d)
and mean flow conditions are listed in Table 5.2 and 5.3. Also included in the table are mean flow and
MALF(7d) values for the two principal sites.
5.1
Mean flow
Using the NZMS 260 series maps (1:50,000 scale) covering the Waipara catchment, the specific
discharge for each mean flow shown in Table 5.2 was plotted in the centre of mass for the catchment
area concerned. The same process was extended to include differences in catchment area and flow
estimates between successive sites on the main stem (e.g. between Laidmore Road and White
Gorge) and plotting that specific discharge value in the centre of mass of the residual catchment area.
Isohyds of equal specific discharge were then drawn through a process of interpolation. The resulting
mean flow isohydal map is shown in Figure 5-1.
To decide the likely upper limit of the isohydal range for the mean flow map, reference was made to
the rainfall isohyetal map together with evapotranspiration estimates provided by Chater (2002).
Annual rainfall in the headwaters of the Middle Branch is considered to be about 1200 mm. Allowing
for 680 mm of evapotranspiration, this suggests that the upper isohydal limit in this area is about
2
16 l/s/km .
5.2
Mean annual low flow
Generally, the MALF (7d) map mirrors the isohydal pattern shown in the mean flow map (Figure 5-2).
In this case the uppermost limit is considered to be about 1 l/s/km2.
5.3
Make-up of flow in the Waipara River under mean and low flow
conditions
Tables 5.2 and 5.3 summarises the make-up of flow within the Waipara River under mean and low
flow conditions respectively based on integration of the isohydal map.
When considering the differences in flow values between the estimates obtained from integration of
the isohydal maps and the estimates based on flow relationships discrepancies can be caused by:
a) Gains or losses above the site.
b) Uncertainties around the relationship between the primary and tertiary site. These can be due
to the flow value estimates being outside the gauged range, i.e. the concurrent gaugings were
done at higher flows than MALF(7d) conditions and therefore may not represent low flow
conditions accurately. Other causes for uncertainties are insufficient gauging data and/or a
poor relationship between sites (due to errors in abstraction correction, flow characteristics of
considered catchments are significantly different).
For each tertiary site the mean flow and MALF(7d) estimates derived from the specific yield contours
were tested against values obtained from the regression analyses. Most sub-catchments were found
to have a difference of less than 5% between the values except the ones discussed in the paragraphs
below.
Environment Canterbury Technical Report
24
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
5.3.1
Mean flow conditions
When comparing the flow values in column five and seven in Table 5.2, the mean flow estimate
obtained through map integration for the Waipara North Branch at Greys Road is much higher than
the estimate resulting from the regression relationship. This suggests a loss of surface flow over the
reach from Heathstock to Greys Road. Based on the available concurrent flow gaugings, combined
with the geology and geomorphology of the basin, known as Masons Flat, this could be the case.
However, the data are limited and more concurrent gaugings need to be carried out to confirm this.
The discrepancies between the mean flow estimates based on the isohydal map and the regression
relationship for Waipara at Broxton Road Bridge suggest a gain between the gauging at Greys Road
and Broxton Road Bridge. The available concurrent flow gauging data appears to support this,
however the data are limited and more concurrent gaugings need to be carried out to confirm this.
The difference between the mean flow estimates for Boby Stream is large. This is most likely due to
the uncertainty surrounding the relationship between flows at White Gorge and Boby Stream, instead
of losses above the gauging site. The measurements done at low flows suggest the existence of a
spring in the lower part of the catchment. More data are needed to confirm the reliability and accuracy
of the estimates.
For the site at Stringers Bridge the mean flow estimate derived from the isohydal map is lower than the
estimate resulting from the regression relationship with White Gorge. This suggests a gain in flow over
the reach between these two sites. Due to the high number of samples, relatively low standard error
around the estimate and the close proximity of the two sites, the estimate is considered to be highly
representative of the mean flow conditions at Stringers Bridge. The flow data from concurrent
gaugings carried for the Waipara River at White Gorge and at Stringers Bridge confirms a gain, likely
from seepage out of the alluvial sediments from the surrounding terrace.
Weka Creek is discussed in section 4.3.5. Estimates of mean flows are not expected to be
representative of natural flow conditions, due to the existence of a storage dam above the site. The
mean flow value obtained from integration of the specific yield contours is therefore different than that
calculated from the regression relationship. Mean flow for Weka Creek is likely to be higher than the
estimate obtained from the regression, due to harvesting of high flows.
Data for the Waipara River at Stringers Bridge and Waipara River at upstream Omihi confluence
suggests a substantial loss of surface flows between the sites. Concurrent flow measurements for
both sites confirms this, however the flows at the site upstream of the Omihi confluence are greatly
influenced by surface water and hydraulically connected water takes.
The discrepancy between the mean flow estimates based on correlation and the isohydal map for
Omihi at Waipara confluence is significant. This is due to the poor relationship between White Gorge
and the Omihi as is discussed in section 4.3.7, but also likely the result of uncertainties around
abstractions in the Omihi catchment. The flow characteristics of the upper Waipara and the Omihi
catchment are that different, that additional flow information is required to gain a better understanding
of the Omihi catchment and derive flow estimates that are more accurate and reliable.
The mean flow estimate for Teviotdale based on the relationship with White Gorge compared to the
mean flow value derived from the specific yield contours suggests a gain between the gauging site on
the mainstem of the Waipara just below the confluence with Omihi Stream. Concurrent gauging data
appears to confirm this, although uncertainty exists around the impact of abstractions and the
contribution of Omihi Stream on the measured flows at Teviotdale.
5.3.2
MALF(7d) conditions
The make-up of flow for MALF(7d) conditions is similar to that of the mean flow conditions, as is to be
expected. Data suggests a small loss in the upper Waipara catchment from the North Branch at
Heathstock to Greys Road. Flows appear to recover over the reach to Broxton Road Bridge. From
White Gorge to Stringers Bridge there appears to be a further gain in flow, however less apparent than
when considering mean flow estimates. Surface water flow losses occur over the reach from Stringers
25
Environment Canterbury Technical Report
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North
Canterbury
to the site just upstream of the confluence with Omihi Stream. According to the mean flow estimates
the river likely gains surface water flow over the reach downstream of the Omihi confluence to
Teviotdale. The MALF(7d) estimates however do not show a similar pattern under low flow conditions.
For the following tertiary sites the MALF(7d) estimates derived from the specific yield contours tested
against values obtained from the regression analyses were found to have a difference greater than 5%
between the values due to the fact that small discrepancies in values cause large percentage errors
when considering low flows: Boby Stream; Archers Stream; Smothering Gully; and to a lesser extent
Waipara Middle Branch; Waipara South Branch; and Home Creek.
Estimates of MALF(7d) for Weka Creek are not expected to be representative of natural flow
conditions, due to the existence of a storage dam above the site. The low flow value obtained from
integration of the specific yield contours is therefore different than that calculated from the regression
relationship. MALF(7d) for Weka Creek is likely to be lower than the estimate obtained from the
regression, due to a residual flow condition of 18 l/s related to the storage dam.
Environment Canterbury Technical Report
26
27
Waipara River – estimates of mean annual flow and MALF(7d) for sites included in this analysis
Site
number
River/ Tributary
65901 Waipara River
Environment Canterbury Technical Report
231
233
1421
246
248
1497
1647
949
252
2151
1535
1859
2384
945
1189
511
Waipara North Branch
Waipara North Branch
Tommys Stream
Waipara North Branch
Waipara Middle Branch
Waipara South Branch
Waipara River
Boby Stream
Waipara River
Archers Stream
Weka Creek
Waipara River
Smothering Gully Stream
Home Creek
Omihi Stream
Waipara River
65904 Waipara River
Site
White Gorge
Map
reference
Regression equation
M34:786-937 Primary
N
R2
Heathstock Road
Greys Road
Heathstock Road
Broxton Road Bridge
Macdonald Downs Road
Karetu Downs
Laidmore Road Bridge
U/str Waipara River Confl
Stringers Bridge
U/str Dam
Dam
U/str Omihi Str Confl
State Highway 1
Kings Road Bridge
Waipara Rvr Confl
D/str Omihi Str Confl
M33:727-081
M33:734-039
M33:710-019
M34:724-998
M34:729-989
M34:726-958
M34:765-940
M34:726-962
M34:829-937
M34:864-986
M34:861-983
N34:922-923
N34:967-976
N34:922-982
N34:922-925
N34:923-922
6
5
5
4
8
5
13
8
44
7
5
19
6
23
29
27
0.98
0.99
0.99
0.99
0.97
0.99
0.96
0.86
0.99
0.99
0.70
1.00
0.87
0.69
0.55
0.88
Teviotdale
N34:918-887 Secondary
y = 0.1136x
y = 0.1192x
y = 0.0665x
y = 0.2594x
y = 0.1612x
y = 0.3784x
y = 0.9172x
y = 0.0921x + 8.5518
y = 1.1672x
y = 0.014x
y = 0.054x + 11.018
y = 1.181x
y = 0.0075x
y =0.0364x+24.747
y = 0.0581x + 149.72
y = 1.3209x + 158.49
Note: Values highlighted in blue indicate high reliability
SE Standard Error
^ use data with caution as flows are not natural, as measured below Weka Dam
* use data with caution due to poor correlations
SE of
Estimated
MALF(7d) MALF(7d)
SE
estimate
(l/s)
equation
107
24
6
4
37
22
22
190
4
92
3
4
111
3
24
63
615
12
13
7.1
28
17
41
98
19
125
1.5
17^
126
0.80
29*
156*
300
304
30
8
6
31
26
29
212
4
95
3
5
118
3
25
66
83
Estimated SE of mean
flow
mean flow
estimate
(l/s)
2790
317
333
186
724
450
1056
2559
NA
3257
39
162^
3295
21
126*
312*
3844
4035
38
10
8
35
34
34
278
97
3
55
124
5
27
68
87
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
Table 5.1:
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North Canterbury
Figure 5-1:
Waipara River Catchment – mean flow isohydal map
Environment Canterbury Technical Report
28
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North Canterbury
Figure 5-2:
29
Waipara River Catchment – mean annual low flow (MALF (7d)) isohydal map
Environment Canterbury Technical Report
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North
Canterbury
Table 5.2:
Approximation of mean flow as provided through integration of the isohydal map
(Figure 5-1)
Integration of
Figure 5-1
Site
number
231
233
1421
246
248
1497
1647
65901
949
252
2151
1535
1859
945
2384
1189
511
65904
Correlation
(Table 5.1)
Catchment
2
area (km )
47.6
99.5
32.3
151.6
58.5
112.8
26
348.9
mean
flow
(l/s)
321
503
178
779
451
1068
215
2512
specific
discharge
2
(l/s/km )
6.7
5.1
5.5
5.1
7.7
9.5
8.3
7.2
mean
flow
(l/s)
317
333
186
724
450
1056
329
2559
specific
discharge
(l/s/km2)
6.7
3.3
5.8
4.8
7.7
9.4
12.7
7.3
River/Stream
Waipara North Br
Waipara North Br
Tommys Stream
Waipara North Br
Waipara Middle Br
Waipara South Br
(Residual)
Waipara River
Site
Heathstock Road
Greys Road
Heathstock Road
Broxton Road Bridge
Macdonald Downs Road
Karetu Downs
(Residual)
Waipara River
Laidmore to White Gorge
White Gorge
23.3
372.2
186
2698
8.0
7.2
231
2790
9.9
7.5
Boby Stream
(Residual)
Waipara River
Waipara Rvr Confluence
White Gorge to Stringers
Stringers Bridge
25.3
12.4
409.9
na
260
2958
21.0
7.2
89
467
3257
3.5
37.7
7.9
Archers Stream
Weka Creek
(Residual)
Waipara River
U/str of Dam
Dam
Stringers to U/str Omihi
U/str of Omihi Confl.
14.1
41.1
52.8
517.9
38
223
358
3316
2.7
5.4
6.8
6.4
39
162
38
3295
2.8
3.9
0.7
6.4
Home Creek
Smothering Gully Stream
(Residual)
Omihi Stream
Kings Road Bridge
State Highway 1
U/str Waipara Rvr Confl.
35.7
5.5
132.7
173.9
123
21
358
502
3.4
3.8
2.7
2.9
126
21
165
312
3.5
3.8
1.2
1.8
Waipara River
D/str of Omihi Confl.
691.9
3813
5.5
3844
5.6
(Residual)
Waipara River
D/str Omihi to Teviotdale
Teviotdale
24.4
716.3
59
3873
2.4
5.4
191
4035
7.8
5.6
Laidmore Road Bridge
Environment Canterbury Technical Report
30
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North
Canterbury
Table 5.3:
Approximation of MALF (7d) as provided through integration of the isohydal map
(Figure 5-2)
Integration of
Figure 5-2
Site
number
231
233
1421
246
248
1497
1647
65901
949
252
2151
1535
1859
945
2384
1189
511
65904
31
Correlation
(Table 5.1)
River/Stream
Waipara North Br
Waipara North Br
Tommys Stream
Waipara North Br
Waipara Middle Br
Waipara South Br
(Residual)
Waipara River
specific
specific
Catchment MALF(7d) discharge MALF(7d) discharge
2
2
2
(l/s)
(l/s)
area (km )
(l/s/km )
Site
(l/s/km )
Heathstock Road
47.6
12.6
0.26
12.2
0.26
Greys Road
99.5
15.6
0.16
12.8
0.13
Heathstock Road
32.3
7.0
0.22
7.1
0.22
Broxton Road Bridge
151.6
24.8
0.16
27.8
0.18
Macdonald Downs Road
58.5
18.4
0.32
17.2
0.29
Karetu Downs
112.8
43.3
0.38
40.5
0.36
26
10.4
0.40
Laidmore Road Bridge
348.9
96.9
0.28
98.1
0.28
(Residual)
Waipara River
Laidmore to Whitegorge
White Gorge
23.3
372.2
9.6
106.5
0.41
0.29
4
107
Boby Stream
(Residual)
Waipara River
Waipara Rvr Confluence
White Gorge to Stringers
Stringers Bridge
25.3
12.4
409.9
13.1
1.5
121.1
0.52
0.12
0.30
19
2
125.2
0.75
Archers Stream
Weka Creek
(Residual)
Waipara River
U/str of Dam
Dam
Stringers to U/str Omihi
U/str of Omihi Confl.
14.1
41.1
52.8
517.9
2.6
11.2
0.4
135.3
0.18
0.27
0.01
0.26
1.5
16.7
32
126
0.11
0.41
Kings Road Bridge
State Highway 1
35.7
5.5
132.7
0.90
0.16
0.08
29.4
0.8
126
0.82
0.15
U/str Waipara Rvr Confl.
173.9
24.8
32.1
0.9
10.2
149.7
168.1
0.97
156
0.90
Waipara River
D/str of Omihi Confl.
691.9
309.3
0.45
300
0.43
(Residual)
Waipara River
D/str Omihi to Teviotdale
Teviotdale
24.4
716.3
1.8
311.1
0.07
0.43
7
304
0.42
Springs
Home Creek
Smothering Gully Stream
(Residual)
Springs
Omihi Stream
0.29
0.31
0.24
Environment Canterbury Technical Report
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North
Canterbury
6
Conclusions and Recommendations
6.1
Conclusions
The following conclusions are reached:
a)
Estimates for MALF (7d) and mean flows for most sites within the Waipara catchment. These
have been used to construct MALF (7d) and mean flow specific yield isohyds. These contours
are considered to be reliable for calculation of MALF (7d) and mean flows at given sites,
however as discussed, some sub-catchments can be improved with further data collection and
analysis.
b)
There is poor correlation between concurrent primary and tertiary flow observations for only a
few catchments, either through a lack of gaugings or inconsistencies created by orographic
storm events affecting only part of the catchment.
c)
There is a lack of good low flow data throughout the Omihi Stream catchment. Flows, if present
at all in the tributaries, are generally less than 20 l/s and difficult to measure with accuracy
within their natural setting. The isohydal range for MALF (7d) within this catchment is very low
2
(0.0 – 0.2 l/s/km ) by regional standards reflecting the long hot dry late summers and
consequential low flows typical of the area.
6.2
Recommendations
The following recommendations are made:
a)
The water resources of the Omihi Stream are important and as yet are not adequately defined.
Clearly, the natural flow in the lower catchment is dominated by spring flow occurring below
State Highway 1. How and to what extent that occurs remains unknown. There is a requirement
for reliable information about flow duration, the frequency and magnitude of freshes and floods,
and their attenuation in relation to the timing of peak spring flow and persistence.
Operating a temporary flow station sited near Limestone Creek Road for about 12 months
would provide the necessary information. Additional rainfall and groundwater data collection
within the catchment over the same period would assist better understanding of the complex
groundwater/surface water relationships that exist within the Omihi Stream.
b)
In the Upper Waipara the Greys Road Ltd consents have been granted, but are not operative as
of yet. There is limited data for Upper Waipara gaugings sites. Secondly most of the gaugings
are done outside of the MALF(7d) to mean flow range. This results in large uncertainties around
the estimated flow values and losses/gains between sites. To improve the knowledge and
understanding of this part of the catchment and confirm the results obtained during this mapping
exercise, additional gaugings are recommended at the following sites: Waipara North Branch at
Heathstock, Waipara North Branch at Greys Road, Tommys Stream at Heathstock Road,
Waipara River at Broxton Road Bridge, Waipara River Middle Branch at MacDonald Downs
Road, Waipara South Branch at Karetu Downs. Waipara River at Laidmore Road Bridge, Boby
Stream at upstream Waipara River confluence.
c)
Gaugings done for Weka Creek mostly represent augmented flow conditions, since they were
carried out below the dam. The relationship between White Gorge and Weka Creek gaugings is
therefore extremely poor and relatively insignificant for this mapping exercise. To obtain
information about the natural flows in the Weka Creek catchment, at least eight flow gaugings
above the dam (for example Antills Bridge) are recommended. To complete the picture for
inflows into the dam structure and improve the relationship for Archers Stream, additional
gaugings at Archers Stream upstream of the dam are also recommended.
d)
Metering of water takes would reduce the uncertainty around corrections for abstractions and
increase the reliability and accuracy of the estimates that affected by surface water abstractions
and or hydraulically connected groundwater takes.
Environment Canterbury Technical Report
32
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North
Canterbury
7
Acknowledgements
The assistance of Environment Canterbury staff that provided data and comment during the course of
this study is acknowledged. This report has been reviewed by Jeanine Topelen.
8
References
Chater A.M. (2002): Waipara River water resource report. Environment Canterbury. Report No
U02/84.
Chater A.M. (2003): Seven day mean annual low flow mapping for the Waipara Catchment area.
Environment Canterbury. Report No U03/14.
Horrell G.A. (1992): Water resources of the Waipara, Kowai and Motunau catchments. Canterbury
Regional Council. Unpublished report.
Lloyd I (2002a): The water resources of the Waipara catchment and their management – M.Sc thesis
summary. Environment Canterbury. Report No U02/20.
Lloyd I (2002b): Groundwater in the Waipara alluvial basin – Recharge and allocation. Environment
Canterbury. Report No U02/27.
Loris P (2000): Hydrogeology of the Waipara alluvial basin – M. Sc. thesis summary. Environment
Canterbury. Report No U00/59.
Sanders R (1996): Irrigation water use survey – report on a three year survey of groundwater use on
the Canterbury Plains 1994 to1997. Environment Canterbury. Report No U97/39.
Sanders R (2000): Irrigation water use survey – report on the 2000/01 irrigation season. Environment
Canterbury. Report No U01/50.
33
Environment Canterbury Technical Report
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North Canterbury
Appendix 1A: Listing of consented water takes from Waipara River and unconfined groundwater
Waipara River from White Gorge to Omihi Stream confluence
applied corrections (l/s)
consent no.
consent holder
grid
reference
gw
/
sw
from
to
use
min flow (l/s)
min flow site
max
rate
(l/s)
av
rate
(l/s)
stream
depletion
rate (l/s)
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
NCY800745
Hurunui District Council
N34:902-931
SW
28/03/1969
1/10/2001
ws
-
-
12.0
12.0
-
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
a
NCY840049
Maungatahi Farm Ltd
M34:853-941
SW
28/03/1969
26/02/2002
irr
-
-
22.0
11.3
-
0.6
0.6
0.6
0.6
2.8
4.0
5.7
6.8
6.8
6.2
5.1
2.8
b
NCY870135
Boys Brigade
M34:890-930
GW
2/10/1987
30/04/1992
ws
-
-
1.0
-
0.1
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
c
NCY870059
Maungatahi Farm Ltd
M34:852-939
SW
4/12/1987
30/04/1992
irr
-
-
50.0
50.0
-
2.5
2.5
2.5
2.5
12.5
17.5
25.0
30.0
30.0
27.5
22.5
12.5
b
NCY880031
George G D
M34:838-937
SW
6/05/1988
30/04/1992
irr
-
-
23.0
17.3
-
0.9
0.9
0.9
0.9
4.3
6.0
8.6
10.4
10.4
9.5
7.8
4.3
NCY870273A
Glenmark Irrigation Committee
M34:883-971
SW
7/10/1988
30/04/1992
irr
-
-
45.0
45.0
-
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
NCY870275A
Glenmark Irrigation Committee
N34:900-949
SW
7/10/1988
30/04/1992
irr
-
-
27.0
27.0
-
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
e
NCY870060
Rangatahi Downs Ltd
M34:855-936
SW
20/10/1989
30/04/1992
irr & ws
-
-
38.0
38.0
-
1.9
1.9
1.9
1.9
9.5
13.3
19.0
22.8
22.8
20.9
17.1
9.5
b
CRC900300
Ashmore A A
N34:901-942
GW
2/11/1990
30/04/1994
irr
-
-
0.8
-
0.1
0.0
0.0
0.0
0.0
0.0
0.0
0.1
0.1
0.1
0.1
0.0
0.0
CRC920498/
CRC021176
Tutton, Sienko & Hill
M34:815-934
GW
16/07/1992
9/11/2036
irr
50
White Gorge
22.2
-
22.2
1.1
1.1
1.1
1.1
5.6
7.8
11.1
13.3
13.3
12.2
10.0
5.6
CRC920803
Whyte & 13 others
M34:864-982
SW
10/12/1992
30/04/9999
irr
28 (residual)
Weka Creek below dam
820.0
-
-
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
CRC920650
Retallick T E & M C L
M34:864-929
SW
23/12/1992
11/09/2002
irr
60
Stringers
15.0
3.3
-
0.2
0.2
0.2
0.2
0.8
1.2
1.7
2.0
2.0
1.8
1.5
0.8
CRC920790
Smith P J & Long M
M34:868-930
SW
24/12/1992
20/04/2004
irr
600
White Gorge
45.0
22.5
-
1.1
1.1
1.1
1.1
5.6
7.9
11.3
13.5
13.5
12.4
10.1
5.6
CRC030339
Porter T M & S E
M34:864-929
SW
24/12/1992
30/04/9999
irr
60
Stringers
15.0
1.6
-
0.1
0.1
0.1
0.1
0.4
0.6
0.8
1.0
1.0
0.9
0.7
0.4
CRC000546
Chapman B A & J L
M34:862-929
SW
24/12/1992
30/04/9999
irr
61
Stringers
7.7
2.6
-
0.1
0.1
0.1
0.1
0.6
0.9
1.3
1.5
1.5
1.4
1.2
0.6
CRC940475
Johns B S
M34:869-930
SW
24/12/1992
28/05/1994
irr
600
White Gorge
45.0
22.5
-
1.1
1.1
1.1
1.1
5.6
7.9
11.3
13.5
13.5
12.4
10.1
5.6
CRC920587
Maungatahi Farm Ltd
M34:855-937
SW
24/12/1992
30/04/9999
irr
60
Stringers
50.0
50.0
-
0.0
0.0
0.0
0.0
0.0
17.5
25.0
30.0
30.0
27.5
22.5
12.5
b
CRC920588
Rangatahi Downs Ltd
M34:855-937
SW
24/12/1992
30/04/9999
irr
60
Stringers
38.0
38.0
-
0.0
0.0
0.0
0.0
0.0
13.3
19.0
22.8
22.8
20.9
17.1
9.5
b
CRC940238
Canterbury House Vineyards Ltd
N34:908-923
SW
7/03/1994
7/03/2029
irr
50
White Gorge
26.4
26.4
-
1.3
1.3
1.3
1.3
3.3
4.6
6.5
7.8
3.9
3.6
2.9
1.6
h
CRC940475.2/3/4
Fiddlers Green Wines Ltd
M34:870-924
SW
28/05/1994
30/04/9999
irr
50 Jun-Sep, 53 Oct-May
White Gorge
12.5
6.3
-
0.3
0.3
0.3
0.3
1.6
2.2
3.1
3.8
3.8
3.4
2.8
1.6
i
CRC020962
Xenophon Ltd
M34:870-930
SW
28/05/1994
30/04/9999
irr
50 Jun-Sep, 53 Oct-May
White Gorge
12.5
6.3
-
0.3
0.3
0.3
0.3
1.6
2.2
3.1
3.8
3.8
3.4
2.8
1.6
i
CRC980403
New Zealand Vineyard Estates Limited
N34:906-923
GW
17/10/1997
15/10/2032
irr
-
-
21.0
-
10.5
0.5
0.5
0.5
0.5
2.6
3.7
5.3
6.3
6.3
5.8
4.7
2.6
j
CRC992499
Renowden G
M34:791-925
GW
11/06/1999
10/06/2034
irr
-
-
1.0
-
1.0
0.1
0.1
0.1
0.1
0.3
0.4
0.5
0.6
0.6
0.6
0.5
0.3
CRC002019
Hurunui District Council
N34:903-933
GW
14/08/2000
14/08/2035
ws
-
-
4.4
-
1.1
1.1
1.1
1.1
1.1
1.1
1.1
1.1
1.1
1.1
1.1
1.1
1.1
k
CRC010463
Smith P J & Long M
M34:868-930
SW
27/09/2000
25/09/2035
irr
65
White Gorge
12.5
12.5
-
0.2
0.6
0.6
0.6
3.1
1.1
1.5
1.8
1.8
1.7
1.4
0.8
l
CRC020061
Dickson P B & E M
M34:856-930
GW
9/11/2001
9/11/2036
irr
-
-
2.5
-
2.5
0.1
0.1
0.1
0.1
0.6
0.9
1.3
1.5
1.5
1.4
1.1
0.6
CRC012868
Chapman B A & J L
M34:860-929
GW
9/11/2001
8/11/2036
irr
-
-
5.4
-
5.4
0.3
0.3
0.3
0.3
1.4
1.9
2.7
3.2
3.2
3.0
2.4
1.4
CRC012177
Maungatahi Farm Ltd
M34:855-937
SW
19/06/2002
26/02/2037
ws & irr
50
White Gorge
22.7
22.7
-
0.0
0.0
0.0
0.0
0.0
7.9
11.4
13.6
13.6
12.5
10.2
5.7
CRC021422
Waipara Nominees Ltd
N34:907-933
GW
5/03/2003
5/03/2038
irr
-
-
0.3
-
0.3
0.0
0.0
0.0
0.0
0.1
0.1
0.2
0.2
0.2
0.2
0.1
0.1
CRC030304
Porter T G
M34:863-929
GW
3/09/2003
3/09/2008
irr
-
-
2.0
-
2.0
0.1
0.1
0.1
0.1
0.5
0.7
1.0
1.2
1.2
1.1
0.9
0.5
Still A & M K
M34:851-922
/ M34:853923
GW
29/04/2005
28/04/2040
ws & irr
-
-
3.6
-
3.6
0.2
0.2
0.2
0.2
0.9
1.3
1.8
2.2
2.2
2.0
1.6
0.9
CRC082107
a
b
c
d
e
f
g
h
i
j
k
l
consent shall not be used concurrently with CRC002019, combined rate of two bores shall not exceed 4.4 l/s
Maungatahi Farm Ltd and Rangatahi Downs Ltd are consented to take up to 110.7 l/s, however only 57 l/s is taken
since water is only used by boy scouts when camping, stream depletion is assessed to be 0 l/s
is said to be taken from storage dam (McCaskey)
is said to be taken from storage dam (Forbes)
not to be added back because water is taken during high flow mostly in winter and diverted to other storage dams (see c and d), so it can be used in summer
consent shall not be used concurrently with CRC010463
rate shall not exceed 26.4 l/s May-Aug, 13 l/s Sep-Dec and 6.5 l/s Jan-Apr
combined rate of CRC020962 and 940475.2/3/4 shall not exceed 12.5 l/s from June to September and 3 l/s from October to May
combined rate of two bores (28 and 68.2 m deep) shall not exceed 21 l/s
consent shall not be used concurrently with NCY800745, combined rate of two bores shall not exceed 4.4 l/s
consent shall not be used concurrently with CRC920790
Environment Canterbury Technical Report
34
d
f
g
b
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North Canterbury
Omihi Stream above Waipara River confluence
applied corrections (l/s)
min flow site
max
rate
(l/s)
av
rate
(l/s)
stream
depletion
rate (l/s)
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
Home Creek at Kings Rd
Home Creek at Kings Rd
Home Creek at Kings Rd
Omihi at Baxters
40.0
2.0
25.0
0.3
31.0
15.0
3.0
25.0
34.0
34.0
19.0
40.0
22.0
30.0
45.0
75.0
23.0
25.0
27.0
45.0
55.0
9.0
28.0
1.6
1.4
3.7
55.0
40.0
45.0
40.0
25.0
31.0
10.5
1.9
10.4
34.0
34.0
19.0
40.0
22.0
30.0
45.0
75.0
23.0
25.0
27.0
45.0
55.0
1.6
1.4
1.9
55.0
40.0
45.0
1.0
0.0
0.2
4.4
-
2.0
0.1
1.3
0.0
1.6
0.5
0.1
0.5
0.0
0.0
0.0
2.0
0.0
0.0
2.3
0.0
0.0
1.3
0.0
2.3
2.8
0.2
0.2
0.1
0.1
0.1
2.8
2.0
2.3
2.0
0.1
1.3
0.0
1.6
0.5
0.1
0.5
0.0
0.0
0.0
2.0
0.0
0.0
2.3
0.0
0.0
1.3
0.0
2.3
2.8
0.2
0.2
0.1
0.1
0.1
2.8
2.0
2.3
2.0
0.1
1.3
0.0
1.6
0.5
0.1
0.5
0.0
0.0
0.0
2.0
0.0
0.0
2.3
0.0
0.0
1.3
0.0
2.3
2.8
0.2
0.2
0.1
0.1
0.1
2.8
2.0
2.3
2.0
0.1
1.3
0.0
1.6
0.5
0.1
0.5
0.0
0.0
0.0
2.0
0.0
0.0
2.3
0.0
0.0
1.3
0.0
2.3
2.8
0.2
0.2
0.1
0.1
0.1
2.8
2.0
2.3
10.0
0.3
6.3
0.0
7.8
2.6
0.5
2.6
0.0
0.0
0.0
10.0
0.0
0.0
11.3
0.0
0.0
6.3
0.0
11.3
13.8
0.2
1.1
0.4
0.4
0.5
13.8
10.0
11.3
14.0
0.4
8.8
0.0
10.9
3.7
0.6
3.6
0.0
0.0
0.0
14.0
0.0
0.0
15.8
0.0
0.0
8.8
0.0
15.8
19.3
0.2
1.5
0.6
0.5
0.6
19.3
14.0
15.8
20.0
0.5
12.5
0.0
15.5
5.3
0.9
5.2
0.0
0.0
0.0
20.0
0.0
0.0
22.5
0.0
0.0
12.5
0.0
22.5
27.5
0.2
2.2
0.8
0.7
0.9
27.5
20.0
22.5
24.0
0.6
15.0
0.0
18.6
6.3
1.1
6.3
0.0
0.0
0.0
24.0
0.0
0.0
27.0
0.0
0.0
15.0
0.0
27.0
33.0
0.2
2.6
1.0
0.8
1.1
33.0
24.0
27.0
24.0
0.6
15.0
0.0
18.6
6.3
1.1
6.3
0.0
0.0
0.0
24.0
0.0
0.0
27.0
0.0
0.0
15.0
0.0
27.0
33.0
0.2
2.6
1.0
0.8
1.1
33.0
24.0
27.0
22.0
0.6
13.8
0.0
17.1
5.8
1.0
5.7
0.0
0.0
0.0
22.0
0.0
0.0
24.8
0.0
0.0
13.8
0.0
24.8
30.3
0.2
2.4
0.9
0.8
1.0
30.3
22.0
24.8
18.0
0.5
11.3
0.0
14.0
4.7
0.8
4.7
0.0
0.0
0.0
18.0
0.0
0.0
20.3
0.0
0.0
11.3
0.0
20.3
24.8
0.2
2.0
0.7
0.6
0.8
24.8
18.0
20.3
10.0
0.3
6.3
0.0
7.8
2.6
0.5
2.6
0.0
0.0
0.0
10.0
0.0
0.0
11.3
0.0
0.0
6.3
0.0
11.3
13.8
0.2
1.1
0.4
0.4
0.5
13.8
10.0
11.3
aa
bb
cc
dd
ee
ff
gg
hh
ii
jj
kk
ll
mm
57
Omihi at Baxters
25.0
25.0
-
1.3
1.3
1.3
1.3
6.3
8.8
12.5
15.0
15.0
13.8
11.3
6.3
qq
57
Omihi at Baxters
45.0
45.0
-
2.3
2.3
2.3
2.3
11.3
15.8
22.5
27.0
27.0
24.8
20.3
11.3
rr
irr
-
-
8.0
-
1.1
0.1
0.1
0.1
0.1
0.3
0.4
0.5
0.6
0.6
0.6
0.5
0.3
ss
17/08/2034
irr
-
-
8.0
-
1.1
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
ss
17/08/2034
irr
-
-
8.0
-
1.1
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
ss
grid
reference
gw
/
sw
from
to
use
min flow (l/s)
N34:943-974
N34:943-973
N34:915-992
N34:908-955
N34:929-956
N34:923-984
N34:923-980
N34:924-955
N34:924-984
M34:892-974
N34:927-960
N34:927-960
N34:938-972
N34:938-975
N34:938-975
N34:907-951
N34:909-943
N34:938-975
N34:918-931
N34:918-932
N34:924-984
N34:909-950
N34:909-950
N34:941-956
N34:942-959
N34:923-980
N34:924-982
N34:926-960
N34:938-976
SW
GW
SW
GW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
GW
GW
SW
SW
SW
SW
SW
SW
21/02/1969
21/02/1969
28/03/1969
31/03/1969
1/12/1969
25/03/1970
2/10/1987
6/05/1988
7/10/1988
7/10/1988
7/10/1988
7/10/1988
7/10/1988
7/10/1988
7/10/1988
7/10/1988
7/10/1988
7/10/1988
7/10/1988
7/10/1988
7/10/1988
12/09/1991
12/09/1991
16/07/1992
24/09/1992
12/11/1992
10/12/1992
10/12/1992
10/12/1992
7/01/2002
7/01/2002
23/04/2002
1/10/2001
1/10/2001
1/10/2001
30/04/1992
30/04/1992
30/04/1992
30/04/1992
30/04/1992
30/04/1992
30/04/1992
30/04/1992
30/04/1992
30/04/1992
30/04/1992
30/04/1992
30/04/1992
30/04/1992
30/04/1992
31/12/9999
31/12/9999
30/04/2004
30/04/9999
30/04/2004
30/04/2004
30/04/2004
30/04/2004
irr
irr
irr
ws
irr
irr
irr
irr
irr
irr
irr
irr
irr
irr
irr
irr
irr
irr
irr
irr
irr
ws
irr
irr
irr
irr
irr
irr
irr
10
57
57
57
CRC920817B
Stackhouse K W
Mr K W Stackhouse
Uren S A
Hurunui District Council
Dickie M R & C A
Glenmark Homestead Ltd
McGuckin D J
Stratford B V
Glenmark Irrigation Committee
Glenmark Irrigation Committee
Glenmark Irrigation Committee
Glenmark Irrigation Committee
Glenmark Irrigation Committee
Glenmark Irrigation Committee
Glenmark Irrigation Committee
Glenmark Irrigation Committee
Glenmark Irrigation Committee
Glenmark Irrigation Committee
Glenmark Irrigation Committee
Glenmark Irrigation Committee
Glenmark Irrigation Committee
Ms P J Pollard & 14 Others
Ms P J Pollard & 14 Others
East M C
Savill E M
McGuckin D J
Gould D C
Hutt Creek Vineyard Limited
Stackhouse K W
Glenray Farming Co Limited, Alpine
Pacific Wine Co Limited & Caris
Holdings Limited
N34:916-931
SW
10/12/1992
15/11/2005
irr
CRC920816A
Montana Wines Limited
N34:937-974
SW
10/12/1992
30/04/2004
irr
CRC000056
Mr R G Black
N34:935-967
GW
19/08/1999
17/08/2034
CRC010754
Cabal Properties Limited
N34:935-967
GW
19/08/1999
CRC010755
Cabal Properties Limited
N34:935-967
GW
19/08/1999
consent no.
NCY800639
NCY800640
NCY800636
NCY800767
NCY850184
NCY800618A
NCY870091
NCY870258
NCY870278C
NCY870274B
NCY870279C
NCY870279B
NCY870281B
NCY870280C
NCY870280B
NCY870277A
NCY870276B
NCY870282B
NCY870282C
NCY870281A
NCY870278B
CRC900760A
CRC900760B
CRC920699B
CRC916346B
CRC920820
CRC920808B
CRC920812B
CRC920814B
consent holder
nn
oo
pp
CRC010756
Lichfield Nominees Number 14 Limited
N34:935-967
GW
19/08/1999
17/08/2034
irr
-
-
8.0
-
1.1
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
ss
CRC020654
Waipara Fields Limited
N34:935-967
GW
19/08/1999
17/08/2034
irr
-
-
8.0
-
1.1
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
ss
CRC011833
Glenmark Homestead Limited
N34:923-983
SW
28/05/2001
12/09/2003
irr
10
Home Creek at Kings Rd
15.0
4.2
-
0.2
0.2
0.2
0.2
1.0
1.5
2.1
2.5
2.5
2.3
1.9
1.0
CRC011833.1
Gould G A C
N34:923-983
SW
12/09/2003
28/05/2036
irr
10
Home Creek at Kings Rd
15.0
4.2
-
0.0
0.0
0.0
0.0
0.0
1.5
2.1
2.5
2.5
2.3
1.9
1.0
CRC011937
Stackhouse K W
N34:934-967
SW
7/01/2002
24/12/2036
irr
57
Omihi at Baxters
26.3
21.9
-
0.0
0.0
0.0
0.0
0.0
7.7
10.9
13.1
13.1
12.0
9.8
5.5
CRC011938
Mr K W Stackhouse
N34:943-973
GW
7/01/2002
24/12/2036
irr
-
-
2.0
-
1.7
0.1
0.1
0.1
0.1
0.4
0.6
0.8
1.0
1.0
0.9
0.8
0.4
CRC040201
Greystone Wines Limited
N34:927-952
GW
13/09/2003
12/09/2038
irr
-
-
20.0
-
7.8
0.4
0.4
0.4
0.4
1.9
2.7
3.9
4.7
4.7
4.3
3.5
1.9
CRC040808
Maison Georges Limited
N34:935-967
GW
14/10/2003
17/08/2034
irr
-
-
8.0
-
1.1
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
ss
CRC040279
Hutt Creek Vineyard Limited
N34:926-960
SW
1/12/2003
27/11/2038
irr
57
Home Creek at Kings Rd
40.0
40.0
-
2.0
2.0
2.0
2.0
10.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
tt
CRC041488
Alpine Pacific Wine Company Limited &
Caris Holdings Limited
N34:916-932
SW
26/02/2004
30/04/2004
irr
90
Omihi at u/s Waipara confl
6.0
6.0
-
0.3
0.3
0.3
0.3
1.5
2.1
3.0
3.6
3.6
3.3
2.7
1.5
CRC040488
Gould G A C
N34:929-983
SW
1/04/2004
31/03/2039
irr
57
Home Creek at Kings Rd
55.0
55.0
-
2.8
2.8
2.8
2.8
13.8
0.0
0.0
0.0
0.0
0.0
0.0
0.0
uu
CRC050816
Paddock Family Trust
N34:935-967
GW
30/07/2004
17/08/2034
irr
-
-
8.0
-
1.1
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
ss
CRC032147
Glenray Farming Co Limited & Caris
Holdings Limited
N34:916-931
SW
15/11/2005
30/06/2023
irr
120
Omihi at u/s Waipara confl
25.0
23.8
-
0.0
0.0
0.0
0.0
0.0
8.3
11.9
14.3
14.3
13.1
10.7
5.9
CRC060598
Omihi Irrigation Scheme Partnership
N34:949-970
GW
26/06/2006
23/06/2016
irr
-
-
2.5
-
2.5
0.1
0.1
0.1
0.1
0.6
0.9
1.3
1.5
1.5
1.4
1.1
0.6
CRC082123
Black Estate Limited
N34:935-967
GW
19/10/2007
17/08/2034
irr
-
-
8.0
-
1.1
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
35
Environment Canterbury Technical Report
ss
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North Canterbury
aa
taken from storage King dam
ii
taken from storage Harris dam
qq
bb
taken from storage Carson dam
jj
taken from Omihi Stream to Glenray storage dam
rr
taken from Omihi Stream to Corbett dam, linked to NCY870281A
cc
taken from storage Moore dam, related to NCY870279B
kk
taken from storage Glenray dam, related to NCY870282B
ss
all use well no. N34/0127, users are in user group, essentially one consent
dd
taken from Home Creek to Moore dam, related to CRC920812B
ll
taken form Omihi Stream to Corbett dam
tt
taken from Home Creek to Moore dam, related to 870279B
uu
taken from Home Creek to King dam, related to CRC920808B
ee
taken from storage Corbett dam, related to NCY870281A
mm
taken from Home Creek to King dam, related to NCY870278C
ff
taken from storage Stackhouse dam
nn
taken from Home Creek to King dam, related to NCY870278B and CRC040488
gg
taken from Omihi Stream to Stackhouse storage dam, related to NCY870280C
oo
taken from Home Creek to Moore dam, related to NCY870279B and CRC0402789
hh
taken from storage Whyte dam
pp
relates to NCY870280B, consent to divert water from Omihi Stream to storage
relates to NCY870282B, consent to divert water from Omihi Stream to storage
applied corrections (l/s)
Waipara River from Omihi Stream confluence to Teviotdale
from
to
use
min flow (l/s)
min flow site
max
rate
(l/s)
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
NCY80062B
Landcorp Farming Ltd
N34:946-909
SW
3/07/1987
30/07/1992
ws
-
-
2.0
2.0
-
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
NCY870127
Donaldson I M & C C
N34:921-912
SW
6/05/1988
30/04/1992
irr
-
-
60.0
30.1
-
1.5
1.5
1.5
1.5
7.5
10.5
15.0
18.1
18.1
16.5
13.5
7.5
CRC920345B
Donaldson I M & C C
N34:920-912
SW
16/07/1992
27/10/2004
irr
80
Waipara at Greenwoods
12.0
12.0
-
0.6
0.6
0.6
0.6
3.0
4.2
6.0
7.2
7.2
6.6
5.4
3.0
CRC920345A
Donaldson I M & C C
N34:919-913
SW
16/07/1992
27/10/2004
irr
80
Waipara at Greenwoods
45.0
7.0
-
0.4
0.4
0.4
0.4
1.8
2.5
3.5
4.2
4.2
3.9
3.2
1.8
CRC040869
Donaldson I M & C C
N34:920-912
SW
27/10/2004
5/06/2039
irr
110
Waipara at Teviotdale
45.0
15.1
-
0.0
0.0
0.0
0.8
3.8
5.3
7.5
0.0
0.0
0.0
0.0
0.0
CRC040869
Donaldson I M & C C
N34:920-912
SW
27/10/2004
5/06/2039
irr
110
Waipara at Teviotdale
28.0
24.4
-
1.4
1.4
1.4
1.4
7.0
9.8
14.0
16.8
16.8
15.4
12.6
7.0
Jan
Feb
Mar
Apr
consent no.
consent holder
grid reference
gw
/
sw
av
rate
(l/s)
stream
depletion
rate (l/s)
Waipara River from Teviotdale to coast
consent no.
consent holder
Apr
applied corrections (l/s)
grid reference
gw
/
sw
from
to
use
min flow (l/s)
min flow site
max
rate
(l/s)
av
rate
(l/s)
stream
depletion
rate (l/s)
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
CRC920476
Douglas Cox Limited
N34:920-846
SW
29/10/1992
15/08/1994
irr
-
-
30.5
15.3
-
0.8
0.8
0.8
0.8
3.8
5.3
7.6
9.2
9.2
8.4
6.9
3.8
NCY880728
Paritai Stud Partnership
N34:926-841
SW
3/02/1989
30/04/1992
irr
-
-
90.0
90.0
-
CRC040492
Mr W H & Mrs R Croft
N34:918-849
SW
7/05/2004
5/05/2039
irr
-
-
36.0
36.0
-
4.5
1.8
4.5
1.8
4.5
1.8
4.5
1.8
22.5
9.0
31.5
12.6
45.0
18.0
54.0
21.6
54.0
21.6
49.5
19.8
40.5
16.2
22.5
9.0
Environment Canterbury Technical Report
36
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment, North
Canterbury
Appendix 1B: Consented ground water takes
considered not to be hydraulically connected to
surface water resources
consent no.
consent holder
grid
reference
from
to
max
rate
use (l/s)
av
rate
(l/s)
well
depth
(m)
CRC991435.1 Templefarm Limited
N34:986-992 25/01/1999 20/01/2034
irr
15.0
15.0
87
CRC991554
N34:912-847 22/02/1999 18/02/2034
irr
2.0
0.7
46
CRC992691.1 Mr G A C Gould
N34:922-982 23/07/1999 21/07/2034
irr
18.0
18.0
76
CRC000047
N34:978-987 26/08/1999 17/04/2000
irr
102.0 102.0
145
CRC000047.2 Omihi Creek Limited
N34:978-987 17/04/2000 25/08/2034
irr
72.0
72.0
CRC001363.1 Waipara Oaks Limited
N34:923-966
1/05/2000 27/04/2035
irr
13.7
13.7
86
CRC001804
Dr F T L & Mrs E M Hull
N33:012-015 10/07/2000 31/12/9999
irr
0.3
0.3
171
CRC001645
Penhaligon Holdings Limited
M34:812-927 28/07/2000 13/09/2007
irr
23.0
23.0
161
171
Mr & Mrs C & J D Bakker
Netherwood Trust
104 -155 six wells
CRC010647
Dr F T L & Mrs E M Hull
N33:012-015 21/11/2000 16/11/2035
irr
0.3
0.3
CRC010514
Mr & Mrs T H & D H Ensor
M34:875-931 24/11/2000 22/11/2035
irr
6.2
6.2
72
35.0
90
54
CRC020519.2 Pernod Ricard New Zealand Ltd, Napier M34:889-890
9/11/2001
8/11/2036
irr
35.0
CRC020468
Mr G Bishop
N34:931-956
9/11/2001
9/11/2036
irr
12.8
6.9
CRC020638
Tokarahi Farming Company Limited
M34:796-926 18/03/2002
9/11/2036
irr
25.0
20.8
91
CRC012592.1 Waipara Water Company Limited
M34:843-928 18/03/2002
9/11/2036
irr
7.0
7.0
195
CRC020299
Mr M J Holden
M34:762-941 16/09/2002 31/05/2007
irr
40.0
9.5
50
CRC020780
Waipara Downs Limited
M34:854-942 14/01/2003
9/11/2036
irr
19.0
19.0
114
CRC030385
Mr & Mrs B G & H L Lang
M34:898-919 22/01/2003
9/11/2036
irr
7.0
7.0
120
CRC031668
Rangatahi Downs Limited
M34:873-956 28/05/2003 14/04/2008
irr
6.0
6.0
138
CRC031043.2 Limeloader Irrigation Limited
M34:887-898 20/06/2003
9/11/2036
irr
48.0
48.0
CRC032097
New Zealand Vineyard Estates Limited
M34:887-924 13/08/2003 29/04/2004
irr
15.0
15.0
CRC040015
The Holding Paddock Limited
N34:921-979 13/08/2003 13/08/2038
irr
3.0
3.0
97
M34:848-934 14/08/2003 14/08/2038
irr
35.0
35.0
226
CRC032104.1 Waipara Water Company Limited
CRC040324
Pacific Trustees Services Limited
CRC032097.1 New Zealand Vineyard Estates Limited
N34:924-976
1/10/2003
117 - 131 two wells
195
1/10/2038
irr
1.5
1.5
158
M34:887-924 29/04/2004 13/08/2038
irr
14.2
14.2
195
195
CRC042509
The Mound Partnership
M34:887-924 29/04/2004 13/08/2038
irr
0.8
0.8
CRC050104
Full Gospel Mission Trust
M34:892-926
3/11/2039
irr
1.5
1.5
42
CRC040044.1 McKean Estates Waipara Limited
M34:866-900 22/11/2004 19/11/2039
irr
15.0
15.0
123
CRC051307
Mr & Mrs G D & L E Coles
N34:998-999
6/12/2039
irr
5.8
2.9
126
CRC042918
Xenophon Limited
M34:874-926 24/02/2005 23/02/2040
irr
8.0
6.7
96
M34:865-949 31/03/2005 31/03/2040
irr
5.0
5.0
120
CRC051842.1 Maungatahi Farm Limited
4/11/2004
6/12/2004
CRC051844.1 Maungatahi Farm Limited
M34:876-948 31/03/2005 31/03/2040
irr
25.0
25.0
126
CRC052242
Mr & Mrs M N & S H McKenzie
M34:884-917 29/04/2005 28/04/2040
irr
36.0
35.0
130
CRC061913
Rangatahi Downs Limited
M34:866-959 22/03/2006 21/03/2016
irr
48.0
48.0
110
CRC041060
Mr P J Smith & Ms M Long
M34:867-925 30/05/2006 30/05/2016
irr
7.0
7.0
72
CRC062071
Mr & Mrs AR & KH Munro
N34:954-975 31/05/2006 30/05/2016
irr
35.0
34.7
79
CRC062789
Mr D J Bedford
M34:844-925 14/11/2006 14/11/2016
irr
2.0
2.0
56
CRC062789
Mr D J Bedford
M34:844-925 14/11/2006 14/11/2016 ws
2.0
0.1
56
Environment Canterbury Technical Report
37
38
Appendix 2A: Waipara River at White Gorge - Mean monthly flow (l/s)
Environment Canterbury Technical Report
11052
3167
824
9018
10460
797
17179
5640
16491
5144
3234
9232
2406
5560
2092
2267
1396
4940
5443
6123
August
September
October
November
December
January
5270
5178
10429
7555
7094
598
5777
11883
6479
6070
2713
5100
20868
2750
3287
3286
7108
1240
3529
6117
2773
11157
3764
6743
19506
8217
4979
6651
2342
2205
1773
1214
9603
1168
1331
9717
3424
543
861
5156
875
10153
1561
1660
7823
1586
3311
6676
1059
1653
1659
2459
4032
2126
1802
7390
3380
2249
5207
3508
410
897
989
3224
1731
3274
8040
1968
560
337
863
4324
1029
4710
4524
647
525
753
3452
2224
113
964
364
1788
1384
14697
425
375
234
131
260
1306
425
1861
866
209
1563
572
3280
1622
130
213
175
1572
457
1973
249
219
744
66
49
780
125
19444
403
105
450
226
1228
1506
February
274
223
135
566
256
693
525
251
543
3216
28
129
278
73
1241
135
708
112
769
416
542
March
157
121
172
211
173
248
1474
220
318
4756
73
1069
977
58
422
103
521
223
187
187
606
April
177
200
135
2428
177
627
501
581
910
4066
87
879
1324
70
607
3349
1185
462
365
208
956
May
630
622
493
2965
1553
2570
1488
817
2295
2974
278
1460
1720
154
603
663
2138
1725
2074
540
1428
June
2797
5357
524
6283
2483
2247
3144
14376
4522
6490
712
4149
2808
312
3499
563
1073
1004
9318
676
3660
Mean
2262
2766
2547
3017
4570
3190
4684
3500
4118
1399
1520
2627
3263
3666
1593
2437
1781
1936
2086
2787
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
July
1987/88
1988/89
1989/90
1990/91
1991/92
1992/93
1993/94
1994/95
1995/96
1996/97
1997/98
1998/99
1999/00
2000/01
2001/02
2002/03
2003/04
2004/05
2005/06
2006/07
Mean
July
1999/00
2000/01
2001/02
2002/03
2003/04
2004/05
2005/06
2006/07
Mean
3277
8186
3082
2880
1826
6764
7413
4775
August
September
October
November
December
January
February
28894
3603
4164
5437
9475
1932
4618
8303
17313
1627
1976
18467
4457
1024
1239
6586
5801
2673
1934
10811
4976
3061
7638
5271
2009
7222
5149
1578
1004
1209
4316
3212
1239
2281
1389
745
2426
969
3701
1821
645
24752
708
399
868
497
1761
4233
426
2312
373
934
296
1129
668
877
March
599
1192
305
800
409
433
392
590
April
293
1215
4632
1450
882
593
405
1353
May
2411
358
1194
1217
2681
2440
2854
865
1658
June
3415
528
4351
994
1606
1584
12237
869
3167
Mean
5115
5051
2160
3982
2554
2725
2824
3487
Seven-day mean annual flow and mean annual low flow mapping of the Waipara River catchment,
North Canterbury
Environment Canterbury Technical Report
Appendix 2B: Waipara River at Teviotdale - Mean monthly flow (l/s)
corrected for abstraction upstream
39