Potential Soil Loss Prediction for Land Resource Management in the Nakdong River Basin

摘要: The purpose of this study is to analyze the potential soil loss and hazard zone by Revised Universal Soil Loss Equation(RUSLE) for preservation management land resources which base ecosystem, grasp relationship between RUSLE factors in Nakdong River Basin. All thematic maps used are constructed through GIS spatial analysis method derived from digital topographic maps, detailed land-cover mean annual precipitation 30 years collected respectively National Geographic Information Institute, Institute Agricultural Science Technology, Ministry Environment. slope length LS-factor that takes much times area's wideness was calculated automatically AML(Arc Macro Language) program developed Van Remortel et al.(2001, 2003). results as follows; First, according estimation RUSLE, it shows approximately 82% area have relatively lower possibility 1 ton/ha loss. While, 9.4% () needed intensive continuous Because amount their greater than 10 optimum level suggested Morgan(1995). For these areas, author believe a new approach can minimize environmental impacts improvement cultivation process buffer forest should be applied. Second, factors, topographical(LS-factor) cover management(C-factor) conditions lot influence on case However, because factor's affect might different based variety hierarchy extent, necessary evaluate terms extent field observations further studies.