CONTENTS 



FIGURES — Continued 



Page 



140 Effect of relative water depth, L/d, and comparison of dimensionless horsepower 



requirements, *, for pneumatic breakwater at a 50-percent wave height attenuation 202 



141 Effect of unit air discharge, q, and incident wave steepness, H^/L^, on effectiveness 



of pneumatic breakwater • 203 



142 Effect of unit air discharge, q, and orifice diameter on effectiveness of pneumatic 



breakwater 204 



143 Effect of unit air discharge, q, and multiple manifold systems on effectiveness of 



pneumatic breakwater 204 



144 Effect of unit air discharge, q, and manifold spacing on effectiveness of pneumatic 



breakwater 205 



145 Effect of applied horsepower per foot and wavelength, L, on effectiveness of pneumatic 



breakwater at a 40-foot water depth 206 



146 Effect of supply pipeline diameter, length of supply pipeline, and supply pipeline 



velocity on total horsepower requirements of pneumatic breakwater 206 



147 Pneumatic breakwater laboratory Investigation of effect of wave frequency and applied 



power on cumulative spectral density at a 2-foot water depth 207 



148 Current profiles of large-scale pneumatic breakwater system tests 209 



149 Air discharge versus wave height attenuation In large-scale pneumatic breakwater 



system tests • 210 



150 Experimental facility used to evaluate hydraulic breakwater effectiveness 211 



151 Effect of relative wavelength, L/d, and nozzle jet diameter on horsepower requirements, 



* , of hydraulic breakwater 212 



152 Effect of incident wave steepness, Hj/Lj, and relative wavelength, L/d, on 



horsepower requirements, *, of hydraulic breakwater 213 



153 Effect of dimensionless jet area on discharge and horsepower requirements of hydraulic 



breakwater 213 



154 Efficiency, t, of hydraulic breakwater as a function of incident wave steepness, H^/L., 



and relative wavelength, L/d 215 



155 Effect of applied horsepower per foot, and wavelength, L, on effectiveness of hydraulic 



breakwater at a 40-foot water depth • 216 



156 Effect of supply pipeline diameter, length of supply pipeline, and supply pipeline 



velocity on total horsepower requirements of hydraulic breakwater 216 



157 Two-dimensional test on effect of relative jet power, P , and incident wave steepness, 



Hj/Lj, on attenuation of deepwater waves for a hydraulic breakwater 217 



158 Two-dimensional tests on effect of relative depth of submergence, y /L, and relative 



jet power, Pj, on attenuation of deepwater waves for a hydraulic breakwater 218 



159 Effect of incident wave steepness, Hj/Lj, on efficiency, e, for various degrees 



of attenuation, two dimensional deepwater wave test, hydraulic breakwater 218 



160 Conceptual model of horizontal and vertical Wave Trap floating membrane breakwater 220 



161 Valve sheet details of Wave Trap of flexible-membrane floating breakwater concept 221 



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