Spatial Data Set Title:
Shallow Water Monitoring Program – Continuous Monitoring
Abstract:
This monitoring project consists of 6 CBP segments (YRKPH, YRKMH, MPNOH,
MPNTF, PMKOH, PMKTF) which are monitored continuously using YSI 6600 (or YSI
6000) data sondes, which record water quality parameters once every 15 minutes over a
one to two week deployment at which time they are replaced to maintain the continuity of
the data set. There are a total of 8 stations; two in YRKPH, two in YRKMH and one
each in the MPNOH, MPNTF, PMKOH, and PMKTF segments.
Purpose:
Monitoring water quality within Chesapeake Bay Tributaries.
Originator:
VIMS - College of W&M
Time Span:
01 Jan – 31 Dec, 2003
Progress:
Complete
Maintenance/Update Frequency:
As Needed
Access Constraints:
Not Applicable
Use Constraints:
Not Applicable
Subject Keywords:
Monitoring, Nutrients, Salinity, Tributaries, Water, Water Quality
Other Keywords:
Turbidity, Chlorophyll, Fluorescence, DO Profiles
Place Keywords:
York River, Mattaponi River, Pamunkey River, Virginia (VA)
Bounding Box:
W -77.26778 E -76.445833 N 38.012500 S 37.284167
Distribution Contact:
Joy Austin
Laboratory Manager
VIMS - College of W&M
PO Box 1346
Rt 1208 Greate Rd
Gloucester Point, VA 23062
804-684-7307
Distribution Liability:
The user of this database should carefully review all pertinent documentation. All water
quality data are submitted or translated to the format described in the Water Quality
Database Design and Data Dictionary.
Target Audience:
Scientists
Geographic Description:
York, Mattaponi, and Pamunkey Rivers, Virginia, USA
Attribute Accuracy Report:
All data generated by the laboratory is subjected to QA/QC protocol and peer review.
Instrument maintenance is performed and recorded in instrument manuals.
Laboratory QC: Sensor specifications, range of measurements, units, resolution, and
accuracy:
YSI 6000/6600 datalogger
Variable
Range of Measurements
Resolution
Accuracy
Date
1-12, 1-31, 00-99 (Mo,Day,Yr) 1 mo, 1 day, 1 yr NA
Time
0-24, 0-60, 0-60 (Hr,Min,Sec) 1 hr, 1 min, 1 s
NA
Temp
-5 to 45 (c)
0.01 C
+/-0.15C
Sp COND 0-100(mS/cm)
0.01mS/cm
+/-0.5% Of
reading + 0.001mS/Cm
Salinity 0-70 Parts per thousand (ppt)
0.01 ppt
+/- 1% of Reading or 0.1
ppt, (whichever is greater)
DO
0-200 (% air saturation)
0.1% @air sat
+/-2% @air Saturation
DO
200-500 (% air saturation
0.1% @ air sat
+/- 6% @ Saturation
DO
0-20 (mg/l)
0.01 mg/l
+/- 0.2mg/l
DO
20-50 (mg/l)
0.01 mg/l
+/- 0.6mg/l
Depth (shallow) 0-9.1 (m)
0.001m
+/- 0.018m
PH
2-14 units
0.01 units
+/- 0.2units
Turb
0-1000 NTU
0.1 NTU
+/- 5% of
Reading or 2 NTU (whichever is greater)
Logical Consistency Report:
None
Completeness Report:
All deployment schedules were adherred to, except for the time period following
Hurricane Isabel when the Yorktown station (YRK006.77) was destroyed and the data
sonde was never recovered. This station was rebuilt and a sonde deployed in October.
This corresponds with a gap in the data from 9/9/03 to 10/16/03 and this is noted in the
COMMENTS column. Any other gaps in the data, due to sonde or probe malfunction are
noted in the PROBLEM column, where available, or in the COMMENTS column if it is
not.
Horizontal and Vertical Accuracy Report:
A WAAS enabled Garmin GPSMAP 168 using NAD83 was used to determine position
in associated with each station location.
Process Description:
For Continuous Monitoring water quality parameters WTEMP, SPCOND, SALINITY,
PH, DO_SAT, DO, TURB_NTU, FLUOR, TCHL, and DEPTH a YSI 6600 or YSI 6000
sonde unit was used. For LATITUDE and LONGITUDE, a Garmin GPSMAP 168
WAAS enabled GPS unit is used. The methods are found in the METHOD column,
which corresponds to a method code. The data were uploaded to a PC from either YSI
6000 or 6600 dataloggers and reviewed using PC6000/6600 software from YSI. Graphs
were produced and examined using the PC6000/6600 software then printed out and filed.
Next, files were uploaded in comma-delimited format, which were opened in Excel 5.0
software and edited to remove extraneous information (headers, footers, spaces, and preand post-deployment data). Macros supplied by NERRS/CDMO and MD DNR were
used to help with editing, formatting and identifying outliers in the database. Outliers
were determined according to the instruments' manufacturers manual. Suspect data (as in
data believed to result from a damaged or biofouled probe) were evaluated according to
internal protocols and tagged accordingly in the PROBLEMS column associated with
that parameter.
The methods used are as follows:
PARAMETER: CHLA and FLUOR
CBP METHOD: F01
EPA METHOD AND OTHER DESCRIPTION: In-situ measurement of in-vivo
chlorophyll using a probe attached to a multi-parameter sonde. The instrument induces
chlorophyll to fluorescence by shining a beam of light and then measuring the higher
wavelength light which is emitted as a result of the fluorescence process. The output is
processed via the sonde software providing readings in UG/L.
REFERENCE: YSI 6-Series Environmental Monitoring Systems Manual. Revision A.
May 1999. YSI, Inc.; Yellow Spring: Oh: 264p.
PARAMETER NAME: SPCOND, conductivity, in-situ specific conductance at 25 C
CBP METHOD: F01
EPA METHOD OR OTHER DESCRIPTION: A calibrated conductivity sensor attached
to a multi-probe sonde is lowered into a water body and allowed to stabilize prior to
taking the meter reading.
REFERENCE: YSI 6-Series Environmental Monitoring Systems Manual. Revision A.
May 1999. YSI, Inc.; Yellow Spring: Oh: 264p.
PARAMETER NAME: DO
CBP METHOD: F01
EPA METHOD OR OTHER DESCRIPTION: 306.1 In-situ Membrane Electrode. A
calibrated dissolved oxygen sensor attached to a multi-probe sonde is lowered into a
water body and allowed to stabilize prior to taking the meter reading.
REFERENCE: YSI 6-Series Environmental Monitoring Systems Manual. Revision A.
May 1999. YSI, Inc.; Yellow Spring: Oh: 264p.
PARAMETER NAME: DO_SAT
CBP METHOD: F01 306
EPA METHOD OR OTHER DESCRIPTION: In-situ Membrane Electrode. A calibrated
dissolved oxygen sensor attached to a multi-probe sonde is lowered into a water body and
allowed to stabilize prior to taking the meter reading. DO relative to the theoretical value
at saturation (%) is then recorded.
REFERENCE: YSI 6-Series Environmental Monitoring Systems Manual. Revision A.
May 1999. YSI, Inc.; Yellow Spring: Oh: 264p.
PARAMETER NAME: PH, in-situ electrode method
CBP METHOD: F01
EPA METHOD OR OTHER DESCRIPTION: 150.1, A calibrated pH electrode,
(corrects for temperature) attached to a multi-probe sonde, is lowered into a water body
and allowed to stabilize prior to taking the meter reading.
REFERENCE: EPA, 1983. USEPA-600/4-79-020. Method 150.1.
PARAMETER NAME: SALINITY, in-situ measurement
CBP METHOD: L01
EPA METHOD OR OTHER DESCRIPTION: A calibrated conductivity sensor, which
corrects for temperature, is attached to a multi-probe sonde which is lowered into a water
body and allowed to stabilize prior to taking the meter reading. The instrument then
converts conductivity to temperature.
REFERENCE: YSI 6-Series Environmental Monitoring Systems Manual. Revision A.
May 1999. YSI, Inc.; Yellow Spring: Oh: 264p.
PARAMETER NAME: TURB_NTU, turbidity, nephelometric method
CBP METHOD: L01
EPA METHOD OR OTHER DESCRIPTION: 180.1 A nephelometric sensoris attached
to a multi-probe sonde which is lowered into a water body and allowed to stabilize prior
to taking the meter reading
REFERENCE: EPA, 1993. EPA/600/R93/100, Method 180.1, Rev 2.
PARAMETER NAME: WTEMP, water temperature, in-situ
CBP METHOD: F01
EPA METHOD OR OTHER DESCRIPTION: 170.1
REFERENCE: EPA, 1983. USEPA-600/4-79-020. Method 170.1
Entity and Attribute Overview:
In the database there is a WQ_STATIONS table as well as a dataset from each of the 8
stations.
Entity and Attribute Detail Citation:
WQ_STATIONS table contains station name, location and detailed information.
Datasets from each site contain location and water quality data.
Direct Spatial reference Method:
Point
Latitude Resolution:
.00001
Longitude Resolution:
.00001
Geographic Coordinate Units:
Decimal Degrees
Horizontal Datum Name:
NAD 83
Semi-major Axis:
6378137
Denominator of Flattening Ratio:
298.257