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<br />t; <br /> <br />" <br /> <br />" <br /> <br />.' <br />,'. <br /> <br />Dam operations of the lasl decade must have caused one of the following possible effects on <br />sediment resources in the Colorado River ecosystem: sediment resources were enhanced or <br />replenished relative to conditions in the early-to-mid 1990's, sediment resources were maintained in <br />a degraded (post-dam) condition, or long-term export and loss of sediment resources is continuing. <br />Distinguishing between such possibilities has been-and should continue to be-an important <br />function of the GCMRC Adaptive Monitoring Program. The research reviewed above <br />demonstrates that current operations are failing to increase sediment resources_ At least one <br />significant measure of sediment resources, surface area of sand bars above 20,000 cfs, documents <br />continuing depletion of sand resources_ <br /> <br />;,..: <br /> <br />:." <br /> <br />, , <br /> <br />" <br /> <br />. <br />. ~ <br />L::, <br />:~.:;;~ <br />::-. <br />:<','.. <br />:.~'-~ <br /> <br />1....; <br /> <br />~, '" <br />:,~. <br />;.....~ <br />~f <br />,-;f; <br />:-~: <br />..-;. <br /> <br />5 <br />