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Platte River Ecosystem Resources and Management, with Emphasis on the Big Bend Reach in Nebraska

Figures

Figure 13. Average monthly shortage of water near Grand Island under various FERC alternatives in the FERC supplemental revised draft environmental impact statement (SRDEIS) (FERC 1994b) for re-regulation of Kingsley Dam and associated facilities (M. Butler, USFWS, personal communication). The shortages were computed using the Opstudy model by comparing the lowest 25% of the years in the study period against the dry year average instream flow recommendation (IFR) of USFWS, and all other years against the average IFR. The average shortage for present conditions (SRDEIS baseline) is approximately 358,000 acre-feet (Opstudy model). Under the Nebraska Plan the total shortage is 347,000 acre-feet. Although 96,00 acre-feet of water in the Nebraska Plan is release specifically for instream flow purposes and not hydropower/irrigation, the average shortage is reduced by only 11,000 acre-feet. USFWS IFR require a total of 1,266,500 acre-feet.

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