Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Simulation of Field Soil Loss by Artificial Rainfall Simulator - By Varing Rainfall Intensity, Surface Condition and Slope -

인공강우기에 의한 시험포장 토양유실량 모의 - 강우강도, 지표면 및 경사조건 변화 -

  • Shin, Minhwan (Geum-River Environment Research Laboratory) ;
  • Won, Chul-hee (Institute of Environmental Research, Kangwon National University) ;
  • Choi, Yong-hun (Division of Agricultural Engineering, Kangwon National University) ;
  • Seo, Jiyeon (Division of Agricultural Engineering, Kangwon National University) ;
  • Lee, Jaewoon (Geum-River Environment Research Laboratory) ;
  • Lim, KyoungJae (Division of Agricultural Engineering, Kangwon National University) ;
  • Choi, Joong-dae (Division of Agricultural Engineering, Kangwon National University)
  • 신민환 (국립환경과학원 금강물환경연구소) ;
  • 원철희 (강원대학교 환경연구소) ;
  • 최용훈 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 서지연 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 이재운 (국립환경과학원 금강물환경연구소) ;
  • 임경재 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 최중대 (강원대학교 농업생명과학대학 지역건설공학과)
  • Received : 2009.07.31
  • Accepted : 2009.09.01
  • Published : 2009.09.30
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Abstract

Using artificial rainfall simulator, the soil loss, which is deemed as the most cause of muddy water problem among Non-point source (NPS) pollutant, was studied by the analysis of direct runoff, groundwater discharge, and soil water storage properties concerned with rainfall intensity, slope of area, and land cover. The direct runoff showed increasing tendency in both straw covered and bared soil as slope increases from 5% to 20%. The direct runoff volume from straw covered surface were much lower than bared surface. The infiltration capacity of straw covered surface increased, because the surface sealing by fine material of soil surface didn't occur due to the straw covering. Under the same rainfall intensity and slope condition, 2.4~8.2 times of sediment yield were occurred from bared surface more than straw covered surface. The volume of infiltration increased due to straw cover and the direct runoff flow decreased with decrease of tractive force in surface. To understand the relationship of the rate of direct runoff, groundwater discharge, and soil water storage by the rainfall intensity, slope, and land cover, the statistical test was performed. It shows good relationship between most of factors, except between the rate of groundwater storage and rainfall intensity.

Keywords

Acknowledgement

Supported by : 환경부

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