Shoreline change assessment due to coastal structure development: A case study of Plumbon Estuary, Central Java, Indonesia

Plumbon Estuary shoreline erosion have been a serious problem since early 2000’s. Several mitigations have been implemented to sustain wave abrasion and tidal erosion such as rubble mound. However, the shoreline changes still occur as the implemented coastal structures could not match the wave force and tidal erosion to protect the shoreline. In this study, the analysis of coastal protection effectiveness was conducted based on field observation data and an analysis of abrasion forces caused by dominant waves and tidal currents. The objective of the present study was to identify the shoreline change due to the development of coastal structure in the area. The results indicate that the coastal protection structures implemented at the study site are under designed and their layout is not suitable for the wave configuration at the location.