Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study to Define USLE P Factor from Field Survey in the Four Major Watersheds

현장조사를 통한 4대강 유역의 보전관리인자 산정 연구

  • Yu, Nayoung (Rural construction Engineering, Konju National University) ;
  • Shin, Minhwan (Korea Water Environment Research Institute) ;
  • Seo, Jiyeon (National Institute of Environmental Research) ;
  • Park, Youn Shik (Rural construction Engineering, Konju National University) ;
  • Kim, Jonggun (Department of Regional Infrastructures Engineering, Kangwon National University)
  • Received : 2017.12.04
  • Accepted : 2017.12.26
  • Published : 2018.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

Universal soil loss equation (USLE) had been employed to estimate potential soil loss since it was developed from the statewide data measured and collected in the United States. The equation had an origin in average annual soil loss estimation though, it was modified or improved to provide better opportunities of soil loss estimation outside the United States. The equation has five factors, most studies modifying them to adapt regional status were focused on rainfall erosivity factor and cover management factor. While the conservation practice factor (USLE P factor) is to represent distinct features in agricultural fields, it is challenging to find studies regarding the factor improvements. Moreover, the factor is typically defined using slopes. The factor defining approach was suggested in the study, the approach is a step-by-step method allowing USLE P factor definition with given condition. The minimum condition is slope and field location to provide an opportunity for using in any GIS software and to reflect regionally distinct features. If watershed location, slope, crop type, and mulching type on furrows are given, detailed definition of the factors are possible. The approach was developed from field survey in South-Korea, it is expected to be used for potential soil loss using USLE in South-Korea.

Keywords

References

  1. Jung, K. H., W. T. Kim, S. O. Hur, S. K. Ha, P. K. Jung, and Y. S. Jung, 2004. USLE/RUSLE factors for national scale soil los estimation based on the digital detailed soil map. Korean J. Soil Sci. Fert., 37(4): 19-206.
  2. Kongju National University, 2016. Development of topsoil erosion model for Korea. Yesan-gun: Republic of Korea (http://npslab.kongju.ac.kr/KORSLE/).
  3. Ministry of Environment, 2012. A bulletin on the survey of the erosion of topsoil. Sejong-si: Ministry of Environment.
  4. Park, M., J. L. Lee, K. Y. Shin, I. Ryu, H. S. Cho, J. D. Choi, and J. K. Lee, 2015. A study on management and reduction plan of non-point source in Doam lake watershed (I). Han River Environment Research Center, National Institute of Environmental Research, NIER-RP2015-356.
  5. Park, Y. S., J. Kim, N. W. Kim, S. J. Kim, J. H. Jeon, B. A. Engel, W. Jang, and K. J. Lim, 2010. Development of new R, C and SDR modules for the SATEEC GIS system, Comp. Geo., 36: 726-734. doi:10.1016/j.cageo.2009.11.005.
  6. Park, Y. S., B. A. Engel, and J. Harbor, 2014. A web-based model to estimate the impact of best management practices, WATER, 6, 455-471. doi:10.3390/w6030455.
  7. Sung, Y. S., 2016. Study of the USLE P factor in USLE Equation. Master's thesis, Kangwon National University of Korea.
  8. Wischmeier, W. H., and D. D. Smith, 1978. Predicting rainfall erosion losses: A guide to conservation planning Handbook No.537. U. S. Department of Agriculture.