Investigation on Wave Runup and Overtopping over a Seawall in a Numerical Flume

Abstract

In the paper, wave runup and overtopping over a seawall were reproduced by using the numerieal wave flume and compared with the experimental data available. Good agreements were obtained. In order to study the scale effeets of physical model experiments of over topping, several numerical models of different values of geometry scale were designed which satisfy Froude similitude. Using the numerical models of different scales, the numerical experimental results show that, if based on Froude similitude, the differences of the computed values of overtopping flux and the predicted values from experimental data inereases as the geometry scale inereases and the wave breaking in the front of seawalls beeomes stronger. It is suggested that the scale effeet should be considered carefully when wave overtopping over a seawall is studied in a wave flume.