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<br />Maybell Site - 9/25/84 <br /> <br />Air photos - channel morphology appears very stable through <br />Maybell area. Floodplainlold channels evident on photos with <br />many overbank areas noticeable. Channel substrate information <br />indicates stable gravellcobblelrock conaitions reach appears to <br />carry relatively little sand. <br /> <br />Conclusion: Dynamic stability is an adequate assumption. Area <br />measurements may be suitaDle for this reach. <br /> <br />WHITE RIVER <br /> <br />Ouray Site - 9/23/84 <br /> <br />... <br /> <br />Air photos - Three channel cutoffs noted on 1974 photos which <br />are not apparent in 1963 photos. Numerous Shifts in bar <br />numbers, location and size in the White River and Green River <br />when added to channel cutoffs suggest Shifting channel <br />conditions. Decreased sinuosity (increased slope) in this reach <br />suggests adjustment in White River to Changes in base level of <br />Green River (which adjusted to regulation of Flaming Gorge). <br />Flow width measurements may not be possible for comparison due <br />to differences in discharge on date of photo (1974 flow 2 times <br />larger than 1963 flow). Plotted cross sections indicate wide <br />Shallow conditions. <br /> <br />Conclusfon: Cannot assume dynamic equilfbrium for this site. <br />