Analysis of the Effect of Reducing Wave Overtopping by Wave Return Walls

摘要

The effect of reducing wave overtopping by use of the wave return wall was quantitatively analyzed based on physical experiments.The overtopping discharge for the arc seawall and the inclined seawall was measured and compared with the predictive formula that estimates reduction of overtopping by the wave return wall.When the overtopping discharge was relatively large ( q/gH3s−−−−√10−3q/gHs310−3mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="mm2" display="inline"mml:mrowmml:miq/mml:mimml:mo//mml:momml:msqrtmml:mrowmml:mig/mml:mimml:msubsupmml:mrowmml:miH/mml:mi/mml:mrowmml:mis/mml:mimml:mn3/mml:mn/mml:msubsup/mml:mrow/mml:msqrtmml:mo/mml:momml:msupmml:mrowmml:mrowmml:mn10/mml:mn/mml:mrow/mml:mrowmml:mrowmml:mo−/mml:momml:mn3/mml:mn/mml:mrow/mml:msup/mml:mrow/mml:math),the agreement in terms of overtopping reduction rate was fairly good between the prediction and the measurement.For the condition of smaller overtopping than the above criterion,however,the discrepancy was large between the predicted and measured result.In this context,it is required to develop a better formula for estimating reduction of wave overtopping by the wave return wall.