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Direct Contributions: Maintenance of the Native Fish Community. ...... 27 <br />Physical Habitat . .......................................... 27 <br />Native Fish Diversity . ........................................ 27 <br />Indirect Contributions: Stream Flow, Sediment, and Water Quality......". 30 <br />Definition ......................................................30 <br />Flows .........................................................31 <br />Data Record ................................................31 <br />Impoundments ...............................................31 <br />Annual Flow Contributions ......... ~ ............................. 34 <br />Components of the Hydrograph ............................. ..... 36 <br />Timing of Peak Snowmelt Runoff ............................... 36 <br />Base Flow ................................................. 37 <br />Peak Runoff .................................................39. <br />Peak Flow Contributions .............................. .... 41 <br />Storm Flow .........................................:~......42 <br />Sediment ...................................................... 42 <br />Sediment Data Record ....................................:...42 <br />Uncorrected Sediment Estimates ................................43 <br />Bias-Corrected Estimates ..................................... 44 <br />Comparisons ............................................... 45 <br />Water Quality ....................................................46 <br />Definition of Concerns ........................................ 46 <br />Selenium ..................................................47 <br />Heavy Metals ...............................................47 <br />Suspended Sediment .........................................48 <br />Hazardous Materials ......................................... 49 <br />Overview of Indirect Contributions ................................ 50 <br />