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<br />Clifton Site - 9/27/84 <br /> <br />Comparison of aerial photos from 1954 and 1980 indicate many <br />floOd plain alterations. Channel pattern has changed most <br />notably in sections 13, 21 and 22 between the two photO dates. <br />As in the Walter Walker area, channel pattern is presently <br />influenced by land use activities adjacent to the river. Bars <br />in the study reaCh ShOW more vegetated conditions presently than <br />in the 1954 photos. Morphological changes (SUCh as those <br />reportea for 1984) are possible during flood years when existing <br />manmade controls and structures are overtopped. Dynamic <br />equiliDrium is assumed. <br /> <br />Conclusion: Current conditions are maintained by floodplain <br />manipulation. <br /> <br />... <br /> <br />Palisade - DeBeque Canyon - 9/27/84 <br /> <br />Aerial photos from 1954 and 1980 indicate few changes in channel <br />pattern have occurred during the Photo interval. Channel condi- <br />tions are controlled by the canyon walls however flOOdplain <br />nevelopment ana use have impinged upon the channel in some <br />instances. Overal" dynamic stability is an adequate assumption <br />for this reaCh. <br /> <br />Conclusion: Physical conditions are essentially the same <br />presently as existed historically. <br />