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<br />4 <br /> <br />side channel. The October Flaming Gorge Dam releases averaged 2,700 ft3/s <br />with a high flow of 3,240 ft3/s and the November releases averaged <br />3,800 ft3/s with a high flow of 4,180 ft3/s. Apparently flows of this <br />magnitude were strong enough to displace, and degrade sandbars. In con- <br />trast, after this high flow event total backwater area increased 56 percent <br />from 2.56 acres on September 12, 1986 to 4.02 acres on December 4, 1986. <br /> <br />The results seem to indicate that color infrared aerial photography can be <br />successfully used to determine backwater size and numbers on the Green <br />River. By studying various flow scenarios for a larger portion of the <br />river, the-optimum flow for producing backwaters may be predicted either <br />for specific sites on the river, or the entire river section. <br /> <br />Recommendation <br /> <br />It is recommended that future studies be long term (several years in <br />scope) to account for channel movement caused by spring flows and annual <br />released from Flaming Gorge Dam. <br /> <br />Future recommendations for monitoring backwater habitat were discussed <br />in length with members of the UC Regional staff and the U.S. Fish and <br />Wildlife Service. A proposal for this work will be transmitted to the <br />Regional Office at a later date. <br /> <br />Acknowledgments <br /> <br />I commend Mr. Bob Williams of the Upper Colorado Regional Office for the <br />excellent job he has done coordinating among the many members of the <br />Green River Studies. I acknowledge the efforts of Rich Clark and <br />Stan Wilds for interpreting the photography. I also acknowledge the <br />special efforts of Joanne Halls for digitizing the data and preparing <br />the map products. <br /> <br />Copy to: 0-150 <br />0-400 <br />0-842B <br />0-1522 <br />0-1524 <br />0-1524 (Puchere11i) <br /> <br />~~ <br />