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토양유실량 및 유사량 산정시 지형 입력 자료의 영향 평가
우원희 ( W. H. Woo ),최재완 ( J. W. Choi ),김기성 ( K. S. Kim ),이지원 ( J. W. Lee ),금동혁 ( D. H. Kum ),강현우 ( H. W. Kang ),임경재 ( K. J. Lim ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2011 강원 농업생명환경연구 Vol.23 No.2
With accelerated soil erosions at the watershed, many computer models have been develoed and utilized for various purposes in recent years. The Universal Soil Loss Equation(USLE) and USLE-based soil erosion and sediment modelling system have been developed and tested because of its ease-of-use and readily available data sets in many countries. The Sediment Assessment Tool for Effective Erosion Control(SATEEC) system was one of these models. In this study, The SATEEC system ver 2.1 and ArcGIS Tool were used to evaluate effects of topographic factors on soil erosion estimation by adjusting values by ±50%. With these changes, there was 24.8% change in estimated soil erosion values. However, the R2 and the Nash-sutcliffe coefficient were 0.688 and 0.642, respectively. Similar trends were also found for estimated sediment yield values. These results indicated that the soil erosion values at the field levels should be evaluated first prior to its application at the watershed scale with the SATEEC system.