PENGGUNAAN CITRA PENGINDERAAN JAUH UNTUK KAJIAN TINGKAT BAHAYA EROSI DAS SERANG KABUPATEN KULONPROGO DAERAH ISTIMEWA YOGYAKARTA

Abstract

Abstract: This research is aimed to know erosion susceptibility  in Serang watershed, Kulonprogo Regency, using data from remote sensing image. Based on the data of erosion susceptibility, it is made land conservation by changing crop and land management, so that maximum tolerance erosion rate can be obtained. Data acquired from black and white aerial photograph scale 1 : 20 000 in 2000 are landform, land use, slope (LS), crop (C), and land management (P). Rainfall erosivity (R) was taken from secondary data, from every precipitation station in the research area. Land erodibility (K) was derived from secondary data, namely Semi Detaill Soil Map of Kulonprogo Regency. Erosion estimation was calculated by using USLE method. The image of Landsat ETM⁺ was used for interpreting geological condition of the research area. The result of the research shows that very dangerous susceptibility erosion is highest percentage from the erosion susceptibility in research area, 29.95% or 7438 hectares. The light erosion susceptibility is 11.76% or 2921 hectares. The lightest erosion susceptibility  is 23.92% or 5939 hectares.