PEMETAAN TINGKAT BAHAYA EROSI MENGGUNAKAN SISTEM INFORMASI GEOGRAFIS DI DAS BAMBAPUN KECAMATAN DONDO KABUPATEN TOLI-TOLI

A watershed is an area bounded by topography and a complex ecosystem unit starts from upstream, middle and downstream or capable of receiving, storing and draining rainwater to the main river.The current condition of the Bambapun watershed needs attention because there have been several phenomena that are detrimental to the community, such as erosion, landslides and floods when rainfall increases.Erosion rate research in the Bambapun watershed was carried out for 3 months, from February to April 2020 using the USLE method and the Geographic Information System, namely Overlay from several data (the determining parameters of erosion)to determine the level of erosion hazard in the Bambapun watershed.Based on the results of the analysis using the Geographic Information System and the USLE method, it is known that the amount of soil eroded in the Bambapun watershed is 6,894.34 tons/ha/year divided into five classes of erosion hazard levels, namely class I erosion rate <15>480 tons/ha/year with an area of 55.87 Ha.
Keyword: DAS, Erosion, SIG, USLE.