Hendra Achiari
Pondokbali Beach located in Mayangan Village, Legon Kulon Subdistrict, Subang Regency, Indonesia is one of the beaches that experienced serious coastal damage problems due to mangrove damage and coastline setbacks. It was reported that the decline of the coastline of 56.8 m / year has influenced the land use around it or the development of ponds since 2006 to 2015. They also suggested that changes in land forms from mangrove forests to fish and shrimp farms can affect the decline of the coastline. However, the main cause of erosion is still unknown. This problem caused a significant decrease in tourist visits. This paper aims to examine our previous assumptions that changes in the coastline at Pondokbali Beach allegedly affected the estuary area which caused flooding and changes in water quality namely saltwater intrusion until the upstream of the Mayangan River. Hydrodynamics and water quality results show that river discharge and sea level rise are more influential than changing coastlines in the Muara Mayangan estuary. The intrusion of salinity on the Mayangan river occurred due to falling river discharge from full capacity in the past into a puddle of water in the Mayangan River in the current conditions.
Application of appropriate technology, the application of writing
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