The present study is mainly concerned with reflection of monochromatic water waves propagating normally and obliquely over submerged breakwaters. Four different shapes of submerged breakwaters are employed and compared for reflecting capability of incident monochromatic waves. The eigenfunction expansion method is employed to estimate reflection coefficients of monochromatic waves. By comparing reflection coefficients, perimeter and sectional areas, the trapezoidal shape is recommended for a desirable submerged breakwater. Predicted coefficients are compared with those of early results of laboratory experiments.
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