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BEsT MANAGEMENT PRACTICEs HANDbooK - Tahoe BMP

BEsT MANAGEMENT PRACTICEs HANDbooK - Tahoe BMP

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• Calculate the remaining height of the uprushing wave based on the effectivewater depth deff at the toe of the protective measure:Htb d(Equation 16.19)b8.16.1.6 HEIGHT OF BROKEN WAVE – JUST BREAKING AT THE TOEeffThe broken wave height at the toe, Htb, is just the breaking wave heightcalculated from CEM II-4-4 and II-4-8 (see above), if the wave is just breaking atthe toe of the protective structure:Htb H b(Equation 16.20)8.16.1.7 HEIGHT OF UNBROKEN WAVECalculate the wave height of the unbroken wave at the toe of the protectivemeasure, Htu, using linear wave theory.One acceptable method is to interpolate values based on the following table.This calculates the unbroken significant wave height H and wavelength L atdepth d, based on the significant wave height H0 in deep water and thewavelength L0 in deep water.Table 8-24: Interpolation Values for Wave Run-UpD / L 0 D / L H / H 0 L / L 00.001 0.01263 2.515 0.079180.002 0.01788 2.119 0.11190.003 0.02192 1.917 0.13690.005 0.02836 1.692 0.17640.007 0.03362 1.561 0.20820.01 0.04032 1.435 0.24800.02 0.05763 1.226 0.34700.03 0.07135 1.125 0.42050.05 0.09416 1.023 0.53100.07 0.1139 0.9713 0.61440.10 0.1410 0.9327 0.70930.20 0.2251 0.9181 0.88840.30 0.3121 0.9490 0.96110.50 0.5018 0.9905 0.99641.00 1.0000 1.0000 1.0000Source: Shore Protection Manual 1984, Table C.1.CHAPTER 8: Shorezone Protective Structures and <strong>BMP</strong>sTRPA <strong>BMP</strong> HandbookPage 8-110 2012

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