Region-Scaled Soil Erosion Assessment using USLE and WEPP in Korea

  • Kim, Min-Kyeong (Department of Agricultural Environment, National Academy of Agricultural Science, RDA) ;
  • Jung, Kang-Ho (Department of Agricultural Environment, National Academy of Agricultural Science, RDA) ;
  • Yun, Sun-Gang (Department of Agricultural Environment, National Academy of Agricultural Science, RDA) ;
  • Kim, Chul-Soo (Department of Civil Engineering, Kyungbuk National University)
  • Published : 2008.12.31


During the summer season, more than half of the annual precipitation in Korea occurs during the summer season due to the geographical location in the Asian monsoon belt. So, this causes severe soil erosion from croplands, which is directly linked to the deterioration of crop/land productivity and surface water quality. Therefore, much attention has been given to develop accurate estimation tools of soil erosion. The aim of this study is to assess the performance of using the empirical Universal Soil Loss Equation (USLE) and the physical-based model of the Water Erosion Prediction Project (WEPP) to quantify eroded amount of soil from agricultural fields. Input data files, including climate, soil, slope, and cropping management, were modified to fit into Korean conditions. Chuncheon (forest) and Jeonju (level-plain) were selected as two Korean cities with different topographic characteristics for model analysis. The results of this current study indicated that better soil erosion prediction can be achieved using the WEPP model since it has better power to illustrate a higher degree of spatial variability than USLE in topography, precipitation, soils, and crop management practices. These present findings are expected to contribute to the development of the environmental assessment program as well as the conservation of the agricultural environment in Korea.


Soil erosion;Universal Soil Loss Equation (USLE);Water Erosion Prediction Project (WEPP)


  1. DiSilvio, G. (1996) Interrimento e riabilitazione degli invasi artificiali, L'acqua, 6, 49-54
  2. Flanagan, D.C., Gilley, J.E., Franti, T.G. (2007), Water Erosion Prediction Project (WEPP): Development history, model capabilities, and future enhancements, 50, 1603-1612
  3. Rendchler, C.S. and Harbor, J. (2002) Soil erosion assessment tools from point to regional scales-the role of geomorphologists in land management research and implementation, Geomorphology, 47, 189-209
  4. Wischmeier, W.H. and Smith S.S. (1965) Predicting rainfall erosion losses from cropland east of the Rockey Mountains: Guide for selection of practices for soil and water conservation, U.S. Department of Agriculture, Agriculture Handbook, No. 282
  5. Flanagan, D.C. and Nearing, M.A. (1995) U.S. Department of Agriculture (USDA) Water Erosion Prediction Project (WEPP): Hillslope profile and watershed model documentation. National Soil Erosion Research Laboratory (NSERL) Report No. 10, USDA-Agricultural Research Service, NSERL, West Lafayette, Indiana 47907-2077, USA
  6. Foster, G.R. and Lane, L.J. (1987) User requirements USDA-Water Erosion Prediction Project (WEPP), NSERL Report No. 1, USDA-Agricultural Research Service, NSERL, West Lafayette, Indiana 47907-2077, USA
  7. Nearing, M.A., Foster, G.R., Lane, L.J., Finkner, S.C. (1989) A process-based soil erosion model for USDA-Water Erosion Prediction Project technology, Trans. ASAE, 32, 1587-1593
  8. Wischmeier, W.H. and Smith S.S. (1978) Predicting rainfall erosion losses - a guide to conservation planning, U.S. Department of Agriculture, Agriculture Handbook, No. 537
  9. Park, J.H., Woo, H.S., Pyun, C.K., Kim, K.K. (2000) A study of distribution of rainfall erosivity in USLE/ RUSLE for estimation of soil loss. JKWRA, 33, 603-610
  10. Box. Jr.J.E. (1981) The effect of surface slaty fragment on soil erosion by water, Soil Sci. Soc. Am., 43, 111-116
  11. Kim, M.K., Flanagan, D.C., J.R. Frankerberger, C.R. Meyer (2009) Impact of precipitation changes on runoff and soil erosion in Korea using CLIGEN and WEPP, J. of Soil and Water Conserv., (In press)
  12. Pimentel, D., Harvey, C., Resosudarmo, P., Sinclair, K., Kurz, D., McNair, M., Crist, S., Shpritz, L., Fitton, L., Saffouri, R., Blair, R. (1995) Environmental and economic costs of soil erosion and conservation benefits, Science, 267, 1117-1123
  13. Clark, E.H., Haverkamp, J.A., Chapman, W. (1985) Eroding Soils. The off-farm Impacts, The Conservation Foundation, Washington, DC, USA, p.252
  14. Lal, R. (1995) Erosion-crop productivity relationships for soils of Africa. Soil Sci. Soc. Am., 59, 661-667
  15. Daily, G., Dasgupta, P., Bolin, B., Crosson, P., Guerny, J.du., Ehrlich, P., Folke, C., Jansson, A.M., Kautsky, N., Kimzig,, Levin, S., Maler, K.G., Anderson, P.P., Siniscalo, D., Walker, B. (1998) Food production, population growth, and the environment, Science, 281, 1291-1292
  16. Amore, E., Modica, C., Nearing, M.A., Santoro, V.C. (2004) Scale effect in USLE and WEPP application for soil erosion computation from three Sicilian basins, J. Hydrol., 293, 100-114
  17. Matson, P.A., Parton, W.J., Power, A.G., Swift, M.J. (1997) Agricultural intensification and ecosystem pro perties. Science, 277, 504-509
  18. Ghidey, F. and Alberts, E.E. (1996) Comparison of measured and WEPP predicted runoff and soil loss for Midwest claypan soil. Trans. ASAE, 39, 1395-1402
  19. Laflen, J.M., Flanagan, D.C., Engel, B.A. (2004) Soil erosion and sediment yield prediction accuracy using WEPP, JAWEA, 40, 289-297
  20. Lindstrom, M.J., Schumscher, T.E., Lobb, D.A., Schumacher, J.A. (1999) Soil Erosion: a combined analysis of tillage and water erosion over a complex landscape, Proceeding of 10th International Soil Conservation Organization Conference, West Lafayette, IN, USA

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