National Water Quality Management System Australian Guidelines for Water Recycling (Phase 2) Stormwater Harvesting and Reuse
Natural Resource Management Ministerial Council Environment Protection and Heritage Council National Health and Medical Research Council
Australian Guidelines for Water Recycling
Stormwater Harvesting and Reuse
National Water Quality Management Strategy
Document No 23
July 2009
Web copy: ISBN 1 921173 45 9
Print copy: ISBN 1 921173 44 0
A publication of the Natural Resource Management Ministerial Council, the Environment
Protection and Heritage Council, and the National Health and Medical Research Council.
July 2009
This work is copyright. It may be reproduced in part subject to the inclusion of acknowledgment of the source and no commercial sale.
The contents of this document have been compiled using a range of source materials; while reasonable care has been taken in its compilation, the member governments of the Natural Resource Management Ministerial Council, the Environment Protection and Heritage Council, and the National Health and Medical Research Council, and the organisations and individuals involved with the compilation of this document, shall not be liable for any consequences that may result from using the contents of this document.
Edited and produced by Biotext, Canberra
Contents
1
Introduction ............................................................................................................. 1
1.1Harvesting and reuse of stormwater and roofwater ......................................... 1
1.2
Purpose and scope of this document ............................................................... 2
1.3
Relationship to other national guidelines ........................................................ 3
1.4
Relationship to state and territory legislation and guidelines ........................... 4
1.5
How to use these guidelines............................................................................ 5
2Roofwater reuse ....................................................................................................... 9
2.1Application of standard approach ................................................................... 9
2.2Preparatory steps .......................................................................................... 10
2.2.1Organisational support ...................................................................... 10
2.2.2Legal requirements ........................................................................... 10
2.2.3Roof characteristics........................................................................... 10
2.3Project design ............................................................................................... 11
2.3.1Tanks ................................................................................................ 11
2.3.2Gutters.............................................................................................. 12
2.3.3Pipework and connections to mainswater .......................................... 12
2.4Operations, maintenance and monitoring ...................................................... 13
2.5Nonresidential roofwater reuse checklist....................................................... 15
3Stormwater reuse ................................................................................................... 17
3.1Reuse application ......................................................................................... 17
3.2Preparatory steps .......................................................................................... 21
3.2.1Organisational support ...................................................................... 21
3.2.2Legal requirements ........................................................................... 21
3.2.3Planning approval ............................................................................. 22
3.3Project design ............................................................................................... 22
3.3.1Stormwater extraction ....................................................................... 22
3.3.2Stormwater quality risk management ................................................ 23
3.3.3Stormwater storage ........................................................................... 27
3.3.4Distribution pipework ....................................................................... 28
3.3.5Irrigation system design .................................................................... 29
(4) (Australian Guidelines for Water Recycling: Stormwater Harvesting and Reuse)
(3)
3.4Operations, maintenance and monitoring ................................................. 30
3.4.1Qualified staff ................................................................................... 30
3.4.2Scheme management plan ................................................................. 30
3.4.3Scheme commissioning, validation and verification .......................... 31
3.4.4Catchment surveillance ..................................................................... 32
3.4.5Managing chemicals ......................................................................... 33
3.4.6Incident response .............................................................................. 33
3.4.7Occupational health and safety.......................................................... 34
3.4.8Managing storage tanks .................................................................... 34
3.4.9Access control .................................................................................. 36
3.4.10 Irrigation scheduling ......................................................................... 36
3.4.11 Operational monitoring ..................................................................... 37
3.4.12 Reporting .......................................................................................... 38
3.4.13 Record keeping ................................................................................. 38
3.4.14 Auditing scheme operations .............................................................. 38
3.4.15 Continuous improvement .................................................................. 39
3.5Additional risk management actions for projects other than
irrigation of public open spaces ................................................................. 39
3.6Stormwater irrigation scheme checklist .................................................... 39
Glossary ........................................................................................................................... 115
Tables, figures and boxes ................................................................................................. 123
References ......................................................................................................................... 125
Abbreviations and acronyms
General
AHMCAustralian Health MinistersConference
ANZECCAustralian and New Zealand Environment and Conservation Council
(replaced in 2001 by EPHC and NRMMC)
ARMCANZAgriculture and Resource Management Council of Australia and New
Zealand (replaced in 2001 by NRMMC)
ASAustralian Standard
CFUcolony forming unit
Ctterm used in disinfection to describe the product of disinfectant concentration
(Cin mg/L) and contact time (tin minutes)
DALYdisability adjusted life year/s
EPHCEnvironment Protection and Heritage Council
MPNmost probable number
NHMRCNational Health and Medical Research Council
NRMMCNatural Resource Management Ministerial Council
NTUnephelometric turbidity units
NZSNew Zealand Standard SARsodium adsorption ratio UVultraviolet
(8) (Australian Guidelines for Water Recycling: Stormwater Harvesting and Reuse)
(7)
Units
cm centimetre
dS/mdeci-Siemens per metre ggram
km kilometre
L litre
m metre
mg milligram mJ millijoule mm millimetre nm nanometre
g microgram
S microsiemens
Acknowledgments
The Natural Resource Management Ministerial Council, the Environment Protection and Heritage Council and the National Health and Medical Research Council acknowledge the contributions of the individuals listed below to the development of these guidelines.
Joint Steering Committee
Chair
Mr Chris Bell
Mr John Williamson
Members
Environment Protection Authority, Victoria
Ms Jo Beatty Department of Sustainability and Environment, Victoria
Ms Jan Bowman Department of Human Services, Victoria
Dr Paul Burrell Department of Natural Resources and Water, Queensland Dr Helen Cameron Australian Government Department of Health and Ageing Dr David Cunliffe Department of Health, South Australia
Mr Leon English Department of Water, Western Australia
Dr Helen Foard Ms Kerry Olssen Dr Paul Smith
Dr Karin Leder
Ms C
Top Related