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DRAFT DRAFT DRAFT <br />Peak Flows at Dolores and Bedrock <br />10000 <br />9000 <br />~ ~ • <br />8000 <br />7000 <br />to <br />6000 <br />v <br />°1 5000 <br />m ~ ~ <br />y 4000 ~ • <br />3000 <br />2000 <br />1000 ~ <br />0 <br />1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 <br />• Peak Flow at Bedrock ®Peak Flow at Dolores <br />Figure 7. Peak flows at Bedrock and Dolores gages from 1974-1985. Because of <br />timing variability and the relatively small amount of water diverted relative to the <br />size and timing of the peak flow, daily MVIC diversions were not added back into <br />the Bedrock record. <br />The annual inflow data for McPhee presented in Figure 5 were also used to <br />examine average daily flows over dry, average, and wet years (Figure 8). The <br />relative amount of geomorphic work done on the channel to flush fines and mobilize <br />bed sediments is shown by the magnitude of average flows, especially over the <br />months of April-June. In the wettest years, average daily flows were an order of <br />magnitude (10 times) more than those in dry years, indicating that channel form, <br />especially in the alluvial reaches, was predominantly controlled by flows in the <br />average to wet range. However, as shown by daily peak flow data (Figure 6), even <br />dry years had flows that were able to flush fine sediments from pools and to scour <br />fines from riffles, though the amount of work to reshape alluvial environments was <br />relatively insignificant compared to wet years. <br />9/5/06 17 <br />