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Environmental Management of Groundwater from the Gnangara Mound Annual Compliance Report July 2016 – June 2017

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Environmental Management of Groundwater from the Gnangara Mound Annual Compliance Report July 2016 – June 2017 Environmental management of groundwater from the Gnangara Mound Annual compliance report July 2016 – June 2017 Environmental management of groundwater from the Gnangara Mound Annual compliance report July 2016 – June 2017 Department of Water and Environmental Regulation December 2017 Department of Water and Environmental Regulation 168 St Georges Terrace Perth Western Australia 6000 Telephone +61 8 6364 7600 Facsimile +61 8 6364 7601 National Relay Service 13 36 77 www.dwer.wa.gov.au © Government of Western Australia December 2017 This work is copyright. You may download, display, print and reproduce this material in unaltered form only (retaining this notice) for your personal, non-commercial use or use within your organisation. Apart from any use as permitted under the Copyright Act 1968, all other rights are reserved. Requests and inquiries concerning reproduction and rights should be addressed to the Department of Water and Environmental Regulation. ISBN 978-1-925524-61-1 (online) Acknowledgements This document was prepared by the Water Allocation Planning Branch with assistance from the Regulation, Water Resource Assessment and Water Information and Modelling branches; and regional operations officers of the Swan–Avon Region (Welshpool office). For more information about this report, contact: Ben Drew, Manager Water Allocation Planning. Disclaimer This document has been published by the Department of Water and Environmental Regulation. Any representation, statement, opinion or advice expressed or implied in this publication is made in good faith and on the basis that the Department of Water and Environmental Regulation and its employees are not liable for any damage or loss whatsoever which may occur as a result of action taken or not taken, as the case may be in respect of any representation, statement, opinion or advice referred to herein. Professional advice should be obtained before applying the information contained in this document to particular circumstances. The Department of Water and Environmental Regulation was established by the Government of Western Australia on 1 July 2017. It is a result of the amalgamation of the Department of Environment Regulation, Department of Water and the Office of the Environmental Protection Authority. This publication may contain references to previous government departments and programs. Please email the Department of Water and Environmental Regulation to clarify any specific information. This publication is available at our website <www.dwer.wa.gov.au> or for those with special needs it can be made available in alternative formats such as audio, large print, or Braille. Environmental management of groundwater from the Gnangara Mound – annual compliance report 1 Summary ............................................................................................................... 1 2 Background ........................................................................................................... 3 2.1 Ministerial statement no. 819 ......................................................................................... 3 2.2 Allocation limits and licensing ........................................................................................ 3 2.3 The Gnangara groundwater system .............................................................................. 5 3 Rainfall ..................................................................................................................6 4 Groundwater use ................................................................................................... 7 4.1 Public water supply ........................................................................................................ 7 4.2 Private licensed use ....................................................................................................... 7 4.3 Use that is exempt from licensing .................................................................................. 8 5 Compliance ......................................................................................................... 11 5.1 Compliance with water level criteria ............................................................................. 11 6 Environmental monitoring, management, research and consultation .................. 13 6.1 Environmental monitoring ............................................................................................ 13 Wetland vegetation ............................................................................................................................. 13 Wetland macroinvertebrates and water quality ................................................................................... 14 Mound spring macroinvertebrates and water quality........................................................................... 15 Wetland frogs ...................................................................................................................................... 15 6.2 Management actions ................................................................................................... 16 Managing public water supply use ...................................................................................................... 16 Managing private licensed use ........................................................................................................... 17 Managing groundwater use exempt from licensing ............................................................................. 17 Updating the 2009 Gnangara groundwater areas allocation plan ....................................................... 18 Strategic Assessment of the Perth and Peel region ............................................................................ 18 6.3 Research initiatives ...................................................................................................... 19 Perth Regional Aquifer Modelling System ........................................................................................... 19 Future climate tool .............................................................................................................................. 19 Perth Region Confined Aquifer Capacity project ................................................................................. 19 Smarter solutions for recycled water ................................................................................................... 20 6.4 Consultation ................................................................................................................. 20 Appendices ................................................................................................................ 21 Appendix A — Water level monitoring results for Ministerial sites on the Gnangara Mound for 2006–2017 ................................................................................................................... 23 Appendix B — Audit tables: Environmental conditions, procedures and commitments for the Gnangara groundwater resources ............................................................................... 29 Appendix C — History of Ministerial statements for the Gnangara Mound ............................ 43 Appendix D — Map information and disclaimer ..................................................................... 44 References ................................................................................................................ 45 Figures Figure 1 Location of Gnangara Ministerial sites, public water supply production bores and private licensed drawpoints ................................................... 4 Figure 2 Annual and average water-year (July–June) rainfall at Perth Airport (BoM site no. 9021) ................................................................................ 6 Department of Water and Environmental Regulation iii Environmental management of groundwater from the Gnangara Mound – annual compliance report Tables Table 1 Rainfall, licensing totals from all aquifers and compliance summary ...... 2 Table 2 Licensed and garden bore water use from all aquifers in the Gnangara groundwater system, comparing 2015–16 and 2016–17 ........................ 8 Table 3 Licensed entitlements from the Superficial aquifer in subareas of the Gnangara groundwater areas allocation plan ......................................... 9 Table 4 Summary of non-compliance with Ministerial criteria for the Gnangara Mound .................................................................................................. 12 iv Department of Water and Environmental Regulation Environmental management of groundwater from the Gnangara Mound – annual compliance report 1 Summary The Department of Water and Environmental Regulation (DWER) was established by the Government of Western Australia on 1 July 2017. It is a result of the amalgamation of the Department of Environment Regulation, Department of Water and the Office of the Environmental Protection Authority. This report contains references to previous government departments and programs. This report describes the previous Department of Water’s compliance with Ministerial conditions and commitments for the Gnangara Mound for the period 1 July 2016 – 30 June 2017. These conditions and commitments, including water level criteria, were set by the Minister for Environment in Ministerial statement no. 819 (Government of Western Australia 2009a). Over the 2016–17 reporting period, the number of sites that were non-compliant with absolute minimum
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