The methods and results of the independent bodies of work undertaken to analyse the impact of relaxing constraints in the key focus areas are detailed in separate reports on the MDBA website. Table 2 shows the flow ranges worth further investigation, and the supporting environmental outcomes, cost and community acceptance that has been used to determine the package of constraint measures that we recommend move to the next phase. Analysis of key focus areas for constraints that Correlation Total area of Total area of Preliminary Community Key focus appear with peak red gum and Australian cost estimate acceptance area feasible flow events black box National for >60,000 ML/d inundated Aquatic continued at SA border (ha)a Ecosystems estimate) (as a wetlands surrogate for inundated overall (ha) system health) Hume to Up to 40,000 90% 5,000 4,000 $16–22 million OK, Yarrawonga ML/day concerns at (flows as end of measured at flow range Doctors Point) Yarrawonga to 50–100% 73,000–156,000 38,000–52,000 $105–218 OK at Wakool ML/day million flows, Junction concerns at (flows as upper end of measured flow range downstream of Yarrawonga Weir) SA River Up to 80,000 0% 33,000 49,000 $5 million OK Murray ML/day (flows as measured at SA border) Lower Darling Up to 16,000 40% $4–6 million OK 2,500–3,600 400–1,200 (flows as ML/day measured at Weir 32) Goulburn Up to 40,000 58% $31–47 million OK, 19,000 3,000 (flows as ML/day (assuming concerns at measured at levee end of Shepparton) upgrades) flow range Murrumbidgee Up to 48,500 45% 69,000 20,000 $66–80 million OK, (flows as ML/day concerns at measured at upper end of Wagga flow range Wagga)b
The methods and results of the independent bodies of work undertaken to analyse the impact of relaxing constraints in the key focus areas are detailed in separate reports on the MDBA website. Table 2 shows the flow ranges worth further investigation, and the supporting environmental outcomes, cost and community acceptance that has been used to determine the package of constraint measures that we recommend move to the next phase. Analysis of key focus areas for constraints Key focus area that appear feasible Correlation with peak flow events >60,000 ML/d at SA border (as a surrogate for overall system health) Total area of red gum and black box inundated (ha)a Total area of Australian National Aquatic Ecosystems wetlands inundated (ha) Preliminary cost estimate estimate) Community acceptance for continued Hume to Yarrawonga (flows as measured at Doctors Point) Up to 40,000 ML/day 90% 5,000 4,000 $16–22 million OK, concerns at end of flow range Yarrawonga to Wakool Junction (flows as measured downstream of Yarrawonga Weir) ML/day 50–100% 73,000–156,000 38,000–52,000 $105–218 million OK at flows, concerns at upper end of flow range SA River Murray (flows as measured at SA border) Up to 80,000 ML/day 0% 33,000 49,000 $5 million OK Lower Darling (flows as measured at Weir 32) Up to 16,000 ML/day 40% 2,500–3,600 400–1,200 $4–6 million OK Goulburn (flows as measured at Shepparton) Up to 40,000 ML/day 58% 19,000 3,000 $31–47 million (assuming levee upgrades) OK, concerns at end of flow range Murrumbidgee (flows as measured at Wagga Wagga)b Up to 48,500 ML/day 45% 69,000 20,000 $66–80 million OK, concerns at upper end of flow range
CMS-Annual-Report-09Dec14_0.docx