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<br />. <br /> <br />ATTACHMENT 5 <br /> <br />ESTIMATED VALUES FOR MODEL INPUT <br /> <br />Parameter Estimated Value <br />Manning's n .022 <br />Water Temperature 700F * <br />Width of Fan Flow T = 9.5Q.4 ** <br />Fan Slope 4% <br />Time Increment 15min <br />Specific Gravity (Sediment) 2.65 *** <br /> <br />. <br /> <br />* <br /> <br />Based upon a summer average of 790F obtained from a USGS gaging <br />station for the Las Vegas Wash near Henderson, NV. It was assumed <br />that the temperature in our design area would be cooler. <br /> <br />Dawdy's Equation where: T = top width of flow (feet) <br />Q = discharge (ets) <br />Specific gravity of sediment particles flowing in the stream, not the <br />specific gravity of deposited sediment. <br /> <br />** <br /> <br />*** <br /> <br />. <br />