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0 Water Year 2007 EA Inflows, Losses, Release and Volume Summary
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<br />EA accruals, evaporation and seepage loss, and total EA contents during WY07 are listed in
<br />Table 1.
<br />Table 1. Water Year 2007 EA Summary
<br />Month WY2006
<br />Carry-Over
<br />(af) 10% of Storable
<br />Natural Inflows
<br />(af) EA Evaporation
<br />& Seepage Loss
<br />(af) EA Reieases
<br />(af) End-of-Month EA
<br />Content
<br />af
<br />October (2006) 114,182* 4,654 1,094 0 117,742
<br />November 4,606 888 0 121,460
<br />December 4,601 588 0 125,473
<br />January (2007) 5,014 606 0 129,880
<br />February 4,098 379 0 134,410
<br />March 5,198 1,242 0 138,365
<br />April 3,822 1,214 0 140,974
<br />May 0 1,908 0 139,065
<br />June 0 2,010 2,265 7 134,790
<br />July 0 1,857 24,968 107,965
<br />August 0 1,612 7,141 99,213
<br />September 0 1,581 0 97,633
<br />Totals 32,083 14,979 34,374 WY07 Carry-Over
<br />* WY 2006 Carry-Over includes 314 af credited to the EA on 10-01-2006 as per CNPPID's FERC license.
<br />The EA accrued 32,803 af of the Storable Natural Inflows during October through A.pril of
<br />WY07. This accrual, combined with carry-over from WY06, minus evaporation and seepage
<br />losses, resulted in a total EA volume of 140,974 af at the start of the WY07 irrigation season
<br />(May 1 to Sept: 30).
<br />Decreases in EA volume due to evaporation and seepage loss are become increasingly significant
<br />as total reservoir level decreases and the EA volume becomes proportionally greater. For
<br />example, the average EA evaparation and seepage loss for WY00 through WY04 averaged 7,106
<br />af, or approximately 18% of the Storable Natural Inflows allocated to the EA. In WY05, WY06,
<br />and WY07, total EA losses were 14,162 af, 19,282 af, and 14,979 af, respectively, (see Appendix
<br />A, page 19), or approximately 44%, 55%, and 47% of the Storable Natural Inflows allocated to
<br />the EA, respectively.
<br />Water Year 2007 Platte River Flows and EA Releases
<br />During the WY07 whooping crane fall migration period of October 1 to November 15, flows
<br />averaged 369 cfs (median of 385 cfs) at Grand Island. During the WY07 spring whooping crane
<br />. migration period of March 23 to May 10, flows averaged 1,650 cfs (median of 1,330 cfs) at
<br />Grand Island. No EA releases were made during either migration period.
<br />Water Year 2008 EA AOP 4 October 15, 2007
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