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2007 Water Supply Summary

2007 Water Supply Summary. Idaho Department of Water Resources. Atmospheric Sources and Sinks Streamflow River Basin Review: Salmon Big Wood Snake Boise Bear and other Basins County Drought Declarations. UNIQUE APSECTS OF 2007.

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2007 Water Supply Summary

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  1. 2007 Water Supply Summary Idaho Department of Water Resources

  2. Atmospheric Sources and Sinks • Streamflow • River Basin Review: • Salmon • Big Wood • Snake • Boise • Bear and other Basins • County Drought Declarations

  3. UNIQUE APSECTS OF 2007 • Below average snowpack followed by melting and runoff a month earlier than normal. • Irrigation demand about the same as 2006 with similar above average temperatures in July and August, and below normal summer precipitation.

  4. Precipitation was 66% of average in 2007

  5. 2007 Streamflow

  6. 2007 April-July Runoff • Snake R. nr Heise* 1923 kaf 58 % of avg 6 th / 97 years • Big Wood at Hailey 102 45 % 12 / 92 • Boise R. nr Boise* 668 48 % 11 / 112 • Payette at HSB* 921 57 % 13 / 88 • Weiser nr Weiser 150 36 % 5 / 65 • Snake at Weiser 2485 45 % 10 / 97 • Salmon at Whitebird 3664 64 % 16 / 95 • St. Joe at Calder 816 71 % 19 / 88 • Bear at Stewart Dam 22 11 % 9 / 47 • * Unregulated or natural flow

  7. 2006 April-July Runoff • Snake R. nr Heise* 3621 kaf 109 % of avg 61 st / 96 years • Big Wood at Hailey 432 191 % 85 / 91 • Boise R. nr Boise* 2062 145 % 96 / 111 • Payette at HSB* 2238 139 % 74 / 87 • Weiser nr Weiser 718 172 % 62 / 64 • Snake at Weiser 8061 144 % 78 / 96 • Salmon at Whitebird 6440 113 % 58 / 94 • St. Joe at Calder 1191 103 % 45 / 88 • Bear at Stewart Dam 250 125 % 11 / 46 • * Unregulated or natural flow

  8. Salmon

  9. 2007 APR-SEP VOLUME 4058 KAF 63 % OF AVERAGE

  10. Big Wood

  11. Upper Snake 2007 APR-SEP NATURAL FLOW SNAKE R NR HEISE 2371 KAF 57% AVG

  12. Boise

  13. Bear and Other River Basins

  14. 2007 County Drought Declarations

  15. Precipitation at Winchester, Idaho

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