Author(s): Prem Rangsiwanichpong
Linked Author(s):
Keywords: Mapping; RUSLE; Spatial analysis; Thailand
Abstract: Every year, greater than millions of tons of sediment are occurred around the world. One of ma jor sources of sediment is soil erosion. Water erosion also delivers millions of tons of sediment to river, lake, reservoir, and ocean. Soil erosion and sediment are thoughtful problems in agricultural area of the Yom River Basin of Thailand. The purpose of this research aimed to assess the potential of soil erosion and sediment deposition in the Yom River Basin. Erosion model is necessary to develop land use planning. In this research, soil erosion hazard was analyzed by remote sensing data and GIS technique. The volume of soil erosion in each grid cell was estimated by the Revised Universal Soil Loss Equation (RUSLE). This method has been broadly used around the world in mountain, forest, including agriculture areas to estimate average annual soil loss. Moreover, new technique was developed to estimate the capacity of sediment yield or deposition in each sub catchment by modifying the original RUSLE method. It was assumed that the amount of sediment flow from one grid cell to another downstream grid cell depends on the sediment yield of the original grid cell compared to the average sediment yield capacity of the whole catchment. All catchments were considered, and average spatial parameters were calculated for each catchment.
Year: 2020