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Characteristics Analysis for RUSLE Factors based on Measured Data of Gangwon Experimental Watershed(II)  

Lee, Jong-Seol (국립방재교육연구원 방재연구소)
Chung, Jae-Hak (국립방재교육연구원 방재연구소)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.9, no.6, 2009 , pp. 119-124 More about this Journal
Abstract
In this study, the characteristics of estimating methodology for RUSLE factors such as soil erodibility factor, slope length-steepness factor, and cover management factor were reviewed and then the relative error according to each methodology was analyzed. RUSLE was applied to experimental watershed for 42 storm events and their results were compared with measured sediment yield to examine the applicability of RUSLE. As a result, this paper found that it should be necessary to consider vegetation effect for forest application of RUSLE as cover management was the most sensitive factor. Also, soil erodbility factor was calculated from data of soil series by National Academy of Agricultural Science caused sediment yield to be overestimated because there were big differences between the soil series and on-site soil texture. The 22.7% of maximum relative error was shown according to selecting the rain energy equation. In addition, it will be necessary to verify the RUSLE factors with more data in order to improve their accuracy.
Keywords
RUSLE; Soil Erodibility Factor; Slope Length-Steepness Factor; Cover Management Factor;
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