Soil Erosion Assessment of a Hilly Terrain by RUSLE Model - A Case Study of Chittagong Hill Tracts

Among many environmental problems, soil erosion poses a serious threat to the region known as Chittagong Hill Tracts (CHTs) in Bangladesh, comprising three districts, namely Bandarban, Rangamati, and Khagrachari. The annual rate for this hilly terrain was calculated using Revised Universal Soil Loss Equation (RUSLE) model integrated with Remote Sensing Geographic Information System (GIS). ranges of estimated erosivity rainfall, erodibility soil, slope length steepness, crop management factor conservation practices are 806.2 1513.2 MJ.mm.ha-1.h-1.yr-1 (or an average 1121.5 MJ.mm.ha-1.h-1.yr-1), 0 0.02 t.h.MJ-1 mm-1, 78.8 0.41), 0.63 0.57) 0.55 1 0.73), respectively. As per findings, study area is expected lose 182621.5 tons annually, 15.18 t.ha-1.yr-1 also predicted. weighted overlay index approach used produce probability zone map, which shows that majority research falls within slight only small percentage inside high very zones. This proves RS-GIS useful predicting can be programs.