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Last modified
7/14/2009 5:02:30 PM
Creation date
5/20/2009 10:44:51 AM
Metadata
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Template:
UCREFRP
UCREFRP Catalog Number
7423
Author
U.S. Bureau of Reclamation.
Title
Glen Canyon Environmental Studies Draft Report, September 1987.
USFW Year
1987.
USFW - Doc Type
Washington, D.C.
Copyright Material
NO
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<br />Figure VI-6. Pathways of adverse effects of <br />fluctuating releases on the <br />critical resources . . .. .. 54 <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 />I <br />I <br />I <br />I <br />I <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) . . . . . . . 39 <br /> <br />Figure VI-1a. The releases for 1986, a <br />high-water year, were used in the <br />study to represent current <br />operations. Hourly releases for <br />August 21, 1986 illustrate <br />steady flows . . . . . . . . . . . 44 <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. Hourly releases for <br />August 4, 1982 illustrate <br />fluctuating flows . . . . . . . . . 45 <br /> <br />Figure VI-2. Pathways of adverse effects of <br />flood releases on the critical <br />resources . . . . . . . .. .. 49 <br /> <br />Figure VI-3. Large areas of beach, which are <br />exposed at low flows (5,000 cfs <br />- top photo), are submerged at <br />flood flows (40,000 cfs - bottom <br />photo) ........... . 51 <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) . 52 <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 />chub . . . . . . . . . .. .. 53 <br />
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