GIS 및 RUSLE 기법을 활용한 금호강 유역의 토양침식위험도 평가 = Soil Erosion Risk Assessment of the Geumho River Watershed using GIS and RUSLE Methods

다국어 초록 (Multilingual Abstract)

This study integrates the revised universal soil loss equation(PUSLE) with a grid-based GIS method to assess the potential risk of soil erosion at the watershed scale. Data used in this study to generate the RUSLE factors include several thematic maps such as land use, topographic and soil maps, together with tabular precipitation data. Based on the RUSLE estimation for all the grids(10m cells) in the corresponding watershed, a cumulative histogram for the annual soil loss can be constructed. As the results, it shows that the 83.5% value of the annual soil loss for the watershed is less than 1ton/ha. However, the above 30% of agricultural land is defined as a medium or very high-risk area(more than 10ton/ha/yr). So it is necessary to establish soil conservation practices to reduce soil erosion based on the field observation.