Mapping water inundation and inundated landuse which will formed due to development of Karian dam, Ci Berang Sub-Basin, Lebak Regency, Banten Province

Abstract

Overpopulation and development in Java Island have caused changes in land use from productive into non-productive land. One of the changes occurring in Indonesia is the development of the Karian Dam as a Multi-Purpose Dam in the Ci Berang Sub-Basin. This study aims to determine the area of inundated water will covering land use and many villages caused by the construction of Karian Dam. The dam was started the construction in the year 2015 and will complete in the year 2019. The variables used in this study is the elevation of inundated water and the land use of the Ci Berang Sub-Basin. The data for inundated are water level at minimum, normal, and maximum, which combined with digital elevation model (DEM). The research used the landcover data generated from Landsat 8 OLI. The results explained that the Ci Berang Sub-Basin area would be affected by the inundated water is 1,479 Ha. The changes caused by the water inundation will affect the land use in the northern area of Ci Berang Basin those are shrubs, wetlands, plantations, and urban areas more than 54.57 Ha and vacant lots 16,14 Ha. The land use, which has the highest area of inundated water coverage was shrubs 53 % and wetlands 22 %. The inundated water caused many villages covered by water with the highest land use change was Tambak Village with 335.48 Ha, and the lowest was Sindangsari Village with 3.73 Ha.