Coastal zone is a transition area which always influenced by the changes of the land and ocean. the change may occur due to the tide, current, wave, wind, sea water instrusion, runoff, contamination, or continental shelf area. As an effect, erosion and sedimentation phenomenon are occurted and could cause the changes of coasline shape.Kecamatan Muara Gembong which belongs to Kabupaten Bekasi is…