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0 0 <br />Park reaches will be re- surveyed on an annual basis for 2 additional years to <br />establish the short-term dynamics of the river at these locations. Long -term trends <br />will then be documented by re- surveying all 4 reaches on a rotational basis at 5- to <br />10 -year intervals. The specific rotation schedule will be identified at a later time <br />based on runoff conditions (surveys should be performed after high runoff years) and, <br />to the extent possible, minimize cost by performing the surveys in conjunction with <br />other funded work in the vicinity of each site. <br />H. i Aerial photography of adjustable reaches of the Yampa and Green River systems will <br />be taken during the first year, and should be repeated after subsequent high -flow <br />v years to provide a means of documenting changes in channel width and vegetation <br />patterns. Ideally, the entire Yampa River downstream from Cross and the Green <br />River from Flaming Gorge Dam to the Colorado River confluence should be <br />photographed. At minimum, the photographed reaches should include Deerlodge <br />Park, Echo Park, Rainbow - Island Park, the reach between Split Mountain and Sand <br />Wash, the Canyonlands reach. <br />An annual report will be prepared that summarizes the data that was collected during <br />that year, presents comparisons of the newly collected data with previous data, and <br />provides an evaluation of the relationship between the magnitude and duration of the <br />discharges, the relative sediment transport balance through the system and the <br />morphological changes to the river channel. <br />J. After the third year of the program, a more detailed evaluation of the results should <br />be prepared for publication as a USGS Water- Resources Investigations report. This <br />report will focus on trends in both the sediment load and morphometric (cross <br />section) data, and their implications to management decisions that would provide <br />flows to maintain or improve habitat conditions for the endangered fish. <br />A summary of the work tasks and the proposed schedule is presented in Table 1. <br />R <br />