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• DRAFT February 25, 1998 <br />reduced tailwater downstream, and sediment delivery tot he chute channels is reduced by <br />deposition in an upstream pool. The process-response model appears to be validated by <br />fish-capture data at this, and another spawning bar at RM 18.5, on the Yampa River <br />during both the 1991 and 1992 runoff seasons. <br />Pick, T.A. 1996. Peak flow computations, Green River tributaries below Flaming Gorge <br />Dam, Colorado and Utah. Memorandum dated June 18, 19969 U.S. Bureau of Reclamation <br />Technical Service Center, Denver, Colorado. 29p. <br />Streamflow records for U.S. Geological Survey gauges on six tributary streams in the <br />Green River basin were evaluated by Pick (1996) and the magnitude of flood flows for a <br />range of occurrence frequencies was determined. The gauges used in this analysis were: <br />Yampa River near Maybell, Colorado <br />Little Snake River near Lily, Colorado <br />Duchesne River near Randlett, Utah <br />White River near Watson, Utah <br />Price River at Woodside, Utah <br />• San Rafeal River near Green River, Utah <br />For the stations with major upstream reservoirs, especially the Duchesne River with four <br />upstream reservoirs, no attempt was made to remove the effects of regulation from the <br />record. Also, it was assumed that log-Pearson type III was the proper distribution to be <br />used in analysis of the flood records for these gauges. <br />Rakowski, C.L. and J.C. Schmidt. 1996. The geomorphic basis of Colorado Squawfish <br />nursery habitat in the Green River near Ouray, Utah. Draft Final Completion Report and <br />Executive Summary, Department of Geography and Earth Resource, Utah State <br />University, Logan, Utah. 73p. <br />In the sand-bedded alluvial reaches of the Green River where nursery habitat is of primary <br />importance, the magnitude of flood peaks may be separated in three categories: (1) very <br />low peaks that do not inundate the bar tops but rearrange sediment along the bar margins, <br />(2) low-peaks that inundate the bars but do not overtop the banks, and (3) large floods <br />that overtop the banks. While the channel responds rapidly to changes in discharge, the <br />imprint of the antecedent conditions on the low-flow channel form (for example, the <br />relative elevation of the bar tops and the distribution of sediment within the channel) <br />survive flood passage, especially the passage of low-magnitude floods. Nursery habitat <br />availability is a product of low-flow channel form, and that channel form is a product of <br />flood dynamics and antecedent conditions. <br />• <br />24