Accuracy of Long Wave Simulation in Harbors by Boussinesq Model

Abstract

Accuracy of numerical simulations by Boussinesq model for long waves in harbors was investigated through a comparison between numerical and observed long wave spectra at two stations in Shibushi harbor, Kagoshima prefecture, Japan. To reduce the computational load, which is formidably large in two-dimensional computations for long waves accompanied by wind waves, one-dimensional Boussinesq model computation was conducted first, and incident wave spectra at a point closer to the harbor were estimated from the observed spectra. It was found that the long waves in harbors can be well predicted by using the model at least in terms of long wave spectral power and overall frequency distributions.