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Groundwater Allocation Using a Groundwater Level Response Management Method—Gnangara Groundwater System, Western Australia

Author

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  • Gabor Bekesi
  • Megan McGuire
  • Dean Moiler

Abstract

The Gnangara groundwater system (Gnangara system) is an important source of groundwater for Perth, Western Australia: in the order of 350 GL of groundwater is abstracted annually. The Gnangara system also sustains groundwater dependent ecosystems (GDEs), mostly wetlands and native vegetation. Declining groundwater levels across the system have led to impacts on a number of key GDEs. Western Australia’s Department of Water recently prepared a Water Management Plan for the Gnangara system. Allocation limits were reviewed as part of the plan preparation. To assist in reviewing allocation limits, an adaptive Groundwater Level Response Management (GWLRM) methodology was developed and implemented. This paper describes the methodology and its application to the Gnangara system. The methodology was developed to be used as a corrective tool for the short- and medium-term, to assist in achieving long-term sustainability of groundwater management in the context of changing climate and declining groundwater levels. The GWLRM methodology is based on groundwater storage depletion and can be applied to existing allocation limits as an interim tool to assist in making management decisions aimed at recovering groundwater resources. The key to the GWRLM correction is that it will direct water allocation towards sustainable levels on the basis of measured trends. Allocations corrected through application of the GWRLM would therefore represent interim and improved water allocation figures. GWLRM can also identify potential problem areas where the principles or calculations used for long-term sustainable groundwater allocation would need to be reviewed. For the Gnangara system, the calculated storage changes or GWLRM corrections were considered together with results of predictive modelling as part of an expert panel process to derive a more sustainable interim groundwater allocation regime while further research is being completed. Copyright Springer Science+Business Media B.V. 2009

Suggested Citation

  • Gabor Bekesi & Megan McGuire & Dean Moiler, 2009. "Groundwater Allocation Using a Groundwater Level Response Management Method—Gnangara Groundwater System, Western Australia," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 23(9), pages 1665-1683, July.
    • Handle: RePEc:spr:waterr:v:23:y:2009:i:9:p:1665-1683
    DOI: 10.1007/s11269-008-9346-5
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    Citations

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    Cited by:

    1. Chen-Wuing Liu & Yen-Lu Chou & Shien-Tsung Lin & Gin-Jie Lin & Cheng-Shin Jang, 2010. "Management of High Groundwater Level Aquifer in the Taipei Basin," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 24(13), pages 3513-3525, October.
    2. Wen-Ping Tsai & Yen-Ming Chiang & Jun-Lin Huang & Fi-John Chang, 2016. "Exploring the Mechanism of Surface and Ground Water through Data-Driven Techniques with Sensitivity Analysis for Water Resources Management," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 30(13), pages 4789-4806, October.
    3. Adrian Werner & Qi Zhang & Lijuan Xue & Brian Smerdon & Xianghu Li & Xinjun Zhu & Lei Yu & Ling Li, 2013. "An Initial Inventory and Indexation of Groundwater Mega-Depletion Cases," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 27(2), pages 507-533, January.
    4. Adrian Werner & Darren Alcoe & Carlos Ordens & John Hutson & James Ward & Craig Simmons, 2011. "Current Practice and Future Challenges in Coastal Aquifer Management: Flux-Based and Trigger-Level Approaches with Application to an Australian Case Study," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 25(7), pages 1831-1853, May.
    5. Jae Min Lee & Jong Hoon Park & Euijin Chung & Nam C. Woo, 2018. "Assessment of Groundwater Drought in the Mangyeong River Basin, Korea," Sustainability, MDPI, vol. 10(3), pages 1-26, March.

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