Remedial Measures to Combat Sea Erosion Along West Coast of India

Abstract: Kraus, N.C. and Harikai, S., 1983. Numerical model of the shoreline change at Oarai Beach. Coastal Eng., 7: 1–28. A numerical simulation was made of the long-term shoreline evolution of the sandy beach adjacent to Oarai Harbor, Japan. The sand transport and shoreline change at Oarai are dominated by wave diffraction at a long breakwater and interruption of the current and sand transport at a large groin. The model was first calibrated using detailed wave data for a recent 7 1 2-month period. The shoreline change which occurred over three years was then simulated to verify the model's predictive capability. The calculation procedure for the breaking wave height and angle along the beach under combined diffraction and refraction was also verified with field measurements. The availability of detailed wave and survey data stimulated a number of improvements in the calculation procedures for the breaking waves and shoreline change. A comprehensive description of the site is given, and relevant shoreline survey and wave data are listed in an appendix to enable interested parties to test and refine their own models.