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The inflow into the River Murray system for July 2007 was approximately 400 GL, compared to only 125 GL at the same time last year. Despite the recent improvement, this is well below the long-term median inflow of 940 GL for July, and inflows still remain at critically low levels. The River Murray system requires significant rainfall over the coming months to increase allocations and storage volumes in Hume and Dartmouth Reservoirs and Lake Victoria.
The total storage volume at the end of July 2007 was 1,661GL (including Menindee Lakes), compared to 3,814 GL at the end of July 2006. The long term average storage level for the end of July is 6,220 GL.
Table 1: Total storage volume
| Storage |
End July 2007 |
End July 2006 |
| Dartmouth Reservoir |
578 GL (12.8% capacity) |
2,533GL |
| Hume Reservoir |
615 GL (20% capacity) |
611 GL |
| Lake Victoria |
379 GL (56% capacity) |
405 GL |
| Menindee Lakes* |
89 GL* (5% capacity) |
265 GL* |
| Total |
1,661 GL# |
3,814 GL |
| % of full supply (9,352 GL) |
18% |
41% |
*Menindee Lakes surcharge capacity and not in MDBC control when storage falls below
480 GL, control to MDBC when storage exceeds 640 GL.
#Includes dead storage of 210 GL
Flows to South Australia during August will be maintained at approximately 1,120 ML/day compared to the normal minimum entitlement flow of 4,000 ML/day. Most of the weir pools in SA are being maintained at pool level immediately upstream of the weirs, with the exception of Lock 6, which is slightly below pool level.
Since March 2007, there has been a steady increase in salinity levels from the Sunraysia district right through to Lake Alexandrina as a result of reduced flows. These levels are expected to continue to increase under low flow conditions.
Further information about the current drought conditions is available at www.dwlbc.sa.gov.au/murray/rivercond/index.html.
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