Identification of Coastal Problem and Prediction of Coastal Erosion Sedimentation in South Sulawesi

Abstract

Dynamic processes that occur on the coast and the development of coastal areas can cause problems in coastal areas such as erosion and sedimentation. To solve these issues, some types of coastal protection can be applied. On the other hand, to determine the right choice of protection, it must be known in advance whether the erosion or sedimentation would be issued. Incidence of erosion or sedimentation on the coast can be predicted by using the wave parameters for instance wave height and wave period. For the case of grain sediment, the parameters are performed such as diameter and settlement velocity of sediment grain. To predict the erosion and sedimentation, the Kraus's equation is used. It is predicted that erosion and coastal sedimentation in South Sulawesi shows the sedimentation occurs on the Pare-Pare Mattirotasi Beach with the small wave conditions (normal), while the big wave conditions at several points along the eroding shoreline. For the case of Tanjung Bayang, te erosion takes place either in small wave or big wave. On the other hand, the wave height in Tanjung Bira obtained from the wave forecasting results based on the wind data BMKG Selayar waters relatively large yield is 0.89∼1.64 m. So that the sediment grain size is relatively large will experience sedimentation and the smaller grains will easily carried away by the waves and currents that occur so easily eroded.