Abstrak Telah dilakukan pemetaan daerah rawan erosi di Kabupaten Timor Tengah Selatan Provinsi Nusa Tenggara Timur dengan menggunakan aplikasi penginderaan jauh dan sistem infomasi geografi. Tujuan dari penelitian ini adalah untuk memetakan daerah rawan erosi dan tingkat kerawanannya di Kabupaten Timor Tengah selatan, Propinsi Nusa Tenggara Timur. Metode penelitian berupa pembuatan peta curah hujan, pembuatan peta tutupan lahan, dan pembuatan peta kelas lereng. Berdasarkan dari hasil penelitian, tingkat rawan erosi dibagi menjadi tiga kelas yaitu: kelas tidak rawan erosi dengan luas wilayah 127.218,69 Ha meliputi kecamatan Noebeba, kecamatan Amanuban Selatan, kecamatan Kualin, sebagian kecamatan Amanuban Timur dan kecamatan Fatukopa. Kelas rawan erosi dengan luas wilayah 251.082,09 Ha meliputi hampir seluruh kecamatan Timor Tengah Selatan dan kelas sangat rawan erosi sekitar 9.125,1 Ha meliputi wilayah kecamatan Fatumnasi, kecamatan Tobu, kecamatan Mollo Utara, sebagian kecamatan Kot’olin. Kata kunci: Peta Rawan Erosi, Penginderaan Jauh, Sistem Informasi Geografi. Abstract We made maps of areas prone to erosion in Timor Tengah Selatan regency, province of East Nusa Tenggara using remote sensing and geographic information system. The purpose of this study is to map areas prone to erosion and risks assessment in Timor Tengah Selatan regency East Nusa Tenggara province .The research methods include the use of GIS to make rainfall, land cover map and class slopes map. Based on the results, level of erosion can be divided into three classes. First, areas which are not prone to erosion (127.218,69 Ha), covering districts Noebeba, districts Amanuban South, districts Kualin, most districts Amanuban East and districts Fatukopa. Second, areas prone to erosion (251.082.09 Ha) covering almost all districts Timor Tengah Selatan. Third, areas highly prone to erosion (9.125,1 Ha) covering an area districts Fatumasi, districts Tobu, Mollo Utara, districts, most districts Kot`olin. Keywords: Erosion hazard map, Remote sensing, Geographic information system.
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