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TMT Annual Review

TMT Annual Review. Weather, Water, System Flood Control, and Rock Island GBT. Presented by Kasi Rodgers USACE, Water Management Division. December 5, 2012. Basin precipitation for 02 June to 02 July. 2012 Water Supply Forecast at The Dalles (Apr – Aug).

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TMT Annual Review

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  1. TMT Annual Review Weather, Water, System Flood Control, and Rock Island GBT Presented by Kasi Rodgers USACE, Water Management Division December 5, 2012

  2. Basin precipitation for 02 June to 02 July

  3. 2012 Water Supply Forecast at The Dalles (Apr – Aug)

  4. 2012 Reservoir Space Available for Flood Risk Mgmt

  5. Historic and 2012 Flow at Col. River at Birchbank

  6. The Dalles Average Daily Flow 2012 April-July

  7. The year in comparison to highest years

  8. 2011 vs. 2012 Gas Bubble Trauma (GBT) at Rock Island Dam • GBT associated with elevated Total Dissolved Gas (TDG) at Rock Island Dam was significantly lower in 2012 compared to 2011 • Based on the gradually increasing March 2012 forecast the AAs coordinated with the TMT an early draft (3rd wk of March) of Grand Coulee • The early GCL draft helped to minimize GBT at Rock Island in 2012 when compared to the higher levels observed in 2011

  9. Questions? Kasi.a.rodgers@usace.army.mil 503-808-3950

  10. Columbia Basin Snowpack above The Dalles 2011 2012

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