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Groundwater sources of the Murray Alluvium water resource plan
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Groundwater Source Update Department of Planning, Industry & - - PowerPoint PPT Presentation
Groundwater Source Update Department of Planning, Industry & - - PowerPoint PPT Presentation
MURRAY PUBLIC EXHIBITION | MURRAY ALLUVIUM WATER RESOURCE PLAN Groundwater Source Update Department of Planning, Industry & Environment | Water July 2019 Groundwater sources of the Murray Alluvium water resource plan Page 2 Lower Murray
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Lower Murray Cross Sectional Map
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Cross Section A Swan Hill to near Corowa
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Cross Section B Echuca to Jerilderie
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Existing Access Licenses & Extraction Limit – Lower Murray Deep
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Access License Category Number of Licenses Share Component Aquifer 345 84,710 Local Water Utility/Town Water Supply 4 79
Existing extraction limit: 83,700 ML/year Existing extraction limit including BLR: 85,225 ML/year
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Existing Access Licenses & Extraction Limit – Lower Murray Shallow
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Access License Category Number of Licenses Share Component Aquifer 258 57,653 Local Water Utility/Town Water Supply 2 87 Salinity and Watertable Management 2 20,010
Existing extraction limit including BLR: 81,893 ML/year
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Groundwater Trading – Lower Murray Deep
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Year Allocation assignment dealings (71T) Share Component assignment dealings(71Q) number volume (ML) number volume (ML) 2015-16 207 35,055 5 1,011 2016-17 68 14,748 11 2,650 2017-18 149 29,782 4 798 Year Allocation assignment dealings (71T) Share Component assignment dealings(71Q) number volume (ML) number volume (ML) 2015-16 2016-17 1 360 2017-18 1 360
Groundwater Trading – Lower Murray Shallow
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Extraction and Long Term Average Annual Extraction Limit (LTAAEL) – Lower Murray Deep
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Water Source Overview (Usage Distribution)
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Monitoring Bore Locations
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GW036743 GW036586
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Hydrograph – GW036823 Swan Hill
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Hydrograph – GW036765 Womboota
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Hydrograph – GW036742 Deniliquin
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Hydrograph – GW036743 Blighty
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Hydrograph – GW036586 Blighty
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Hydrograph – GW036638 Urana
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Hydrograph – GW036352 Lowesdale
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Conclusions
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- Water levels have recovered to pre WSP levels by 2010/11 after a
period of decline, particularly in Deniliquin – Finley area. Recovery is related to wet years and low extractions. Since 2010/11, levels have remained stable and but have began to decline since 2016.
- The large drawdowns (18m Deniliquin; 21m Blighty) in monitoring
bores are indicative of areas of significant groundwater extractions.
- Annual groundwater extractions have not exceeded the Long Term
Average Annual Extraction Limit (LTAAEL) in Lower Murray deep groundwater source except in 2018/19. The rolling average has not yet been exceeded.
- Annual groundwater extractions of the Lower Murray Shallow water
source were between 1,200 ML and 7,400 ML from 2012/13 to 2017/18 (limited metering).
- Temporary (71T) and permanent trading (71Q) within the deep