NZQA registered unit standard
28932 version 1
Page 1 of 4
Title
Design and plan an irrigation system
Level
5
Credits
75
Purpose
This unit standard is for people working in the irrigation
industry, and recognises the knowledge and skills required to
design and plan irrigation systems for an agricultural or
horticultural property, sports turf, or public ground.
Classification
Water Industry > Irrigation
Available grade
Achieved
Explanatory notes
1
All regulations including Resource Management Act 1991, Building Act 2004, Health
and Safety and Employment Act 1992, National Policy Statement for Freshwater
Management 2014 and any other relevant legislation is followed.
2
The following technical publications are adhered to:
Irrigation New Zealand Technical Glossary
New Zealand Piped Irrigation Systems Design Code of Practice, Irrigation New
Zealand, ISBN 978-0-473-25350-9
New Zealand Piped Irrigation Systems Design Standards, Irrigation New Zealand,
ISBN 978-0-473-25346-2
New Zealand Piped Irrigation Systems Installation Code of Practice, Irrigation New
Zealand, ISBN 978-0-473-25348-6
Irrigation New Zealand Irrigation Overview, Irrigation New Zealand, ISBN 978-0-47324106-3
Irrigation New Zealand Irrigation Development, Irrigation New Zealand, ISBN 978-0473-24121-6
New Zealand Water Measurement Code of Practice
Guide for Writing an Irrigation System Commissioning Report
The Irrigation New Zealand Guideline for Backflow Prevention
The Irrigation New Zealand Guideline for Writing a Design Brief
Available from the Irrigation New Zealand website, http://irrigationnz.co.nz/
3
The irrigation system could be an upgraded system or a new system.
4
Definitions
Capex is the cost of developing or providing non-consumable parts for the product or
system.
Opex is an ongoing cost for running a product, business, or system.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
28932 version 1
Page 2 of 4
5
It is recommended that learners have completed unit standard 28933 concurrently
with this unit standard.
6
All control components for Irrigation Systems should follow manufacturer’s
specifications.
7
All electrical work related to the planning and design of control components for
Irrigation Systems must be carried out in accordance with the New Zealand Electricity
Regulations 2010.
Outcomes and evidence requirements
Outcome 1
Select a system to best fit the client specifications and design brief.
Evidence requirements
1.1
Calculates KPI’s, seasonal variations, peak demand and implications of each in
relation to the design brief in accordance with New Zealand Piped Irrigation
Systems Design Standards and the New Zealand Irrigation Piped Irrigation
Systems Design Code of Practice.
1.2
Evaluates a range of irrigation systems and determine system type most
suitable to the design brief taking into account opex and capex considerations.
System selection must be in accordance with the Irrigation New Zealand
Irrigation Overview and Irrigation New Zealand Irrigation Development.
Outcome 2
Determine the distribution components for an irrigation system.
Evidence requirements
2.1
Calculates the pressures and flows in pipelines and determine a range of
system parameters in accordance with New Zealand Piped Irrigation System
Design Code of Practice and New Zealand Piped Irrigation Systems Design
Standards.
2.2
Implements measures to mitigate the operational risks of pipelines in
accordance with New Zealand Piped Irrigation System Design Code of
Practice and New Zealand Piped Irrigation Systems Design Standards.
2.3
Specifies most suitable pipe type, size and specifications, and headwork
componentry in accordance with New Zealand Piped Irrigation Systems Design
Code of Practice and New Zealand Piped Irrigation Systems Design Standards.
Outcome 3
Determine the pumping components for an irrigation system.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
28932 version 1
Page 3 of 4
Evidence requirements
3.1
Explains the characteristics of pumps and motors and their relationships, and
determine range of system parameters.
Range
includes operating flow and pressure.
3.2
Carries out opex and capex calculations in relation to pumping components.
3.3
Specifies most suitable pump components to match suction and discharge
requirements in accordance with New Zealand Piped Irrigation System Design
Code of Practice.
Outcome 4
Determine the control components for an irrigation system.
Evidence requirements
4.1
Describes electrical safety requirements in accordance with New Zealand Piped
Irrigation Systems Installation Code of Practice.
4.2
Identifies electrical regulatory thresholds relevant to irrigation in accordance
with New Zealand Piped Irrigation Systems Installation Code of Practice.
4.3
Describes irrigation control systems and their applications in accordance with
New Zealand Piped Irrigation System Design Code of Practice.
4.4
Specifies the most suitable control system for the irrigation system in
accordance with New Zealand Piped Irrigation System Design Code of Practice.
Replacement information
This unit standard replaced unit standard 25139, 25140,
25141, 25135, 20956
Planned review date
31 December 2020
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
20 August 2015
N/A
Consent and Moderation Requirements (CMR) reference
0179
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
28932 version 1
Page 4 of 4
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the CMR. The CMR also includes useful information about
special requirements for organisations wishing to develop education and training
programmes, such as minimum qualifications for tutors and assessors, and special
resource requirements.
Comments on this unit standard
Please contact the Primary Industry Training Organisation standards@primaryito.ac.nz if
you wish to suggest changes to the content of this unit standard.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016