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http://dx.doi.org/10.3741/JKWRA.2011.44.8.619

Estimation of Rainfall-runoff Erosivity Using Modified Institute of Agricultural Sciences Index  

Lee, Joon-Hak (School of Civil and Environmental Engineering, Yonsei University)
Oh, Kyoung-Doo (Dept. of Civil Engineering and Environmental Sciences, Korea Military Academy)
Heo, Jun-Haeng (School of Civil and Environmental Engineering, Yonsei University)
Publication Information
Journal of Korea Water Resources Association / v.44, no.8, 2011 , pp. 619-628 More about this Journal
Abstract
The purpose of this study is to evaluate the existing method of calculating rainfall-runoff erosivity using monthly precipitation, such as Fournier's index, modified Fournier's index, IAS (Institute of Agricultural Sciences) index, etc., and to present more reasonable regression model based on monthly rainfall data in Korea. This study introduced a new simplified method of calculating rainfall-runoff erosivity based on monthly precipitation, called by modified IAS index. It was expanded form IAS index which is the simple calculation method by summing up the rainfall amount of two months with maximum amount. Monthly precipitation and annual rainfall-runoff erosivity at 21 weather stations for over 25 years were used to analyze correlation relationship and regression model. The result shows that modified IAS index is the more reasonable parameter for estimating rainfall-runoff erosivity of the middle-western and south-western regions in Korea.
Keywords
MIAS index; Monthly precipitation; Rainfall-runoff erosivity; RUSLE; Soil erosion;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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