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<br />II <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />- <br /> <br />Step g) Wave Runup, Rs <br /> <br />Slope of face must be greater than 5H: 1V <br />Not applicable to rockfill dams <br />Additional steps are required for concrete and smooth surface dams <br /> <br />_ ri" <br />~ - 0.4 + (ri" IL)05 cote <br /> <br />Slope of Face (H:V) = ~ <br />8= <br /> <br />3 ~(Equation should not be used for slopes less than 5: 1) <br /> <br />18.4 degrees <br />1.00 I(Up to 1.5; 1.0 for an embankment with riprap) <br /> <br />Smooth Surface Factor = I <br /> <br />Rs= <br /> <br />3.6 feet (normal water surface) <br /> <br />Angle of Wave Propo- <br />gation to embankment = <br /> <br />o ~degrees <br /> <br />Adjusted Rs = <br /> <br />Rs x cosO = <br /> <br />3.6 <br /> <br />feet <br /> <br />Step h) Wind Setup, S <br /> <br />Is = 14~~F D I <br /> <br />F = wind fetch in miles, normally equal to 2Fe <br />D = average reservoir depth along the central radial <br /> <br />D= <br /> <br />I <br /> <br />17 <br /> <br />Ifeet <br /> <br />S= <br /> <br />0.5 <br /> <br />feet (normal water surface) <br /> <br />Step I) Normal Freeboard Requirement, FB <br /> <br />FB = Rs + S = <br /> <br />4.1 <br /> <br />feet <br /> <br />. <br /> <br />Page 4 of 4 <br /> <br />Filename: Freeboard Wave Runup.xls <br />11/29/2007 <br /> <br />