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<br />. 002 4 ~ation, in some cases have increased the food supply and cover for wildlife. No <br /> <br /> <br />changes in land use in the future are anticipated. <br /> <br />..;..,t <br /> <br />Thoro is an opportunity to improvo otroaFA fisRoriss habitat far tRe rivor ane! Jahn <br /> <br /> <br />Martin Rooorvoir by Bfeducing the amount of sediment, trace elements, heavy metals, <br /> <br /> <br />salts, pesticides. and nutrients entering the hydrologic system would imorove stream <br /> <br /> <br />tisheries habitat for the river and the John Martin Reservoir..,- Sediment and other <br /> <br /> <br />pollutants affect downstream fisheries diversity and populations by filling pool <br /> <br /> <br />segments and changing bottom composition and water temperature. The stressing <br /> <br /> <br />effects of high concentrations of suspended sediment also causes a reduction of the <br /> <br /> <br />quality of fish habitat. The heavy metals, especially selenium and uranium, potentially <br /> <br /> <br />harm fish and wildlife using the watershed. <br /> <br />On-site Problems <br /> <br />Irrigation induced erosion - 4,000 acres eroding at 2-7 times the acceptable <br /> level. An additional 6,000 acres have total <br /> erosion rates exceeding tolerable levels. <br />Productivity on irrigated land decreasing on erosive areas <br />Maintenance on irrigation systems high <br />Irrigation water application fair <br />effectiveness <br /> <br />;!Zm <br />