Abstract : Bedono Village of Sayung District belongs to Demak Regency and is situated on the northern coast of Central Java Province. This area has many rivers and other important habitats: mangrove forests and silty-clay beaches. These rivers transport sediment to the waters of Bedono. With the development, the construction of the Port of Semarang causes changes in current and sediment transportation patterns, leading to erosion and deposition of sediments in various areas in the waters of Demak. Therefor