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<br />Figure VI-la. The releases for 1986, a <br />high-water year, were used in the <br />study to represent current <br />operations. Mean daily discharge <br />for water year 1986 and hourly <br />releases for August 21, 1986, <br />illustrate high steady flows .. 46 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />- <br /> <br />Figure V-2. The forecast error for the total <br />annual inflow into Lake Powell is <br />reduced as the actual runoff <br />progresses . .. ........ 39 <br /> <br />Figure V-3. When operating in a peaking <br />power mode, dam releases increase <br />during periods of high demand <br />(morning and evening) . . . . . . . 41 <br /> <br />Figure VI-lb. The releases for 1982, a <br />low-water year, were used in the <br />study to represent current <br />operations. Mean daily discharge <br />for water year 1982 and hourly <br />releases for August 4, 1982, <br />illustrate fluctuating flows .. 47 <br /> <br />Figure VI-2. Pathways of adverse effects of <br />flood releases on critical <br />resources . . . . . . . .. .. 50 <br /> <br />Figure VI-3. Large areas of beach, which are <br />exposed at low flows (top photo, <br />5,000 cfs, October 1985), are sub- <br />merged at flood flows (bottom photo, <br />40,000 cfs, June 1985) ...... 52 <br /> <br />Figure VI-4. Riverbanks, covered with sand <br />and vegetation (top photo), were <br />significantly eroded and stripped <br />of vegetation following the 1983 <br />flood releases (bottom photo) . 53 <br /> <br />Figure VI-5. Flood releases have adverse <br />impacts (-) primarily on <br />terrestrial resources and <br />recreation. They have no <br />significant impact (0) on trout <br />and common native fish, and <br />appear to benefit (+) humpback <br /> <br />chub . . . . . . . . . . . . . . . 55 <br /> <br />