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(Photos 3,4, 5,6, and 7). The most dramatic change visible can be seen in the image of the <br />confluence of the Green and the Price Rivers (Photo 7 and 8). The greatly reduced flows of <br />the Price River have caused substantial aggradation at the confluence. A complete change <br />in the vertical structure of vegetation is seen by the expanse on tamarisk that now inhabits <br />an area that once had majestic cottonwoods. <br />CONCLUSIONS <br />Within Desolation and Gray Canyons, channel geometries at measured cross <br />sections do not adjust uniformly with increasing discharge. Reaches with armored beds <br />and banks are stable and show little adjustment to increased discharge. The channel in <br />predominantly sand bedded reaches does not behave uniformly and adjusts to localized <br />conditions as discharge increases. The deepest parts of the channel through a range of <br />discharges occurs within the thalweg adjacent to large recirculating eddies. <br />The most abundant surficial deposit within the river corridor of the Cedar Ridge <br />reach is debris flow material, but this unit is not the dominant bank material in the channel. <br />Shoreline habitat and bank material at low discharge are predominantly fine-grained <br />alluvium. As discharge increases the total area of low velocity and recirculating zones <br />i <br />increases while the total length of shorelines encompassed by those zones decreases. Withl, <br />increased discharge eddies become larger in volume but less frequent. On-going analysis 'll <br />will determine if these relations are consistent for the other 3 study reaches. <br />The increase of vegetation and deposition and the processes that have caused such <br />increases are likely to continue. The stabilization of the sand bars and banks that were <br />historically scoured leads us to conclude that vegetation is important in maintaining the <br />channel form as it is today. This narrowing of the channel due to stronger banks will <br />impact future high flows in Desolation Canyon, by channelizing the flow and causing <br />deeper scouring which could in turn affect sensitive habitats along the channel bottom.