Diffraction of long period water waves around Mauritius island

Abstract

Using Green's function, the Helmholtz equation with Sommerfeld condition has been solved numerically, to compute the diffracted wave potentials in wave field. Software DIFIS is developed to evaluate the diffracted wave field around the Mauritius island for the storm waves arriving from south, southeast and east directions. The diffraction coefficients exceed 1.5 along the southern and eastern sides, and they vary between 0.4 and 0.9 along the western side of the Mauritius Island. The effect of diffraction is negligible for the wave periods exceeding 600 s.