Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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HSPF Modeling for Identifying Runoff Reduction Effect of Nonpoint Source Pollution by Rice Straw Mulching on Upland Crops

볏짚 피복에 의한 밭 비점원오염 저감효과 분석을 위한 HSPF 모델링

  • 정충길 (건국대학교 대학원 사회환경시스템공학과) ;
  • 박종윤 (건국대학교 대학원 사회환경시스템공학과) ;
  • 이형진 (한강물환경연구소) ;
  • 최중대 (강원대학교 지역건설공학과) ;
  • 김성준 (건국대학교 사회환경시스템공학과)
  • Received : 2012.02.08
  • Accepted : 2012.03.16
  • Published : 2012.07.31
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Abstract

This study is to assess the reduction of non-point source pollution loads for rice straw surface covering of upland crop cultivation at a watershed scale. For Byulmi-cheon watershed ($1.21km^2$) located in the upstream of Gyeongancheon, the HSPF (Hydrological Simulation Program-Fortran), a physically based distributed hydrological model was applied. Before evaluation, the model was calibrated and validated using 9 rainfall events. The Nash-Sutcliffe model efficiency (NSE) for streamflow was 0.62~0.78 and the NSE for water quality (Sediment, T-N, and T-P) were 0.68, 0.60, and 0.58 respectively. From the field experiment of 16 rainfall events, the rice straw covering reduced surface runoff average 10 % compared to normal surface condition. By handling infiltration parameter (INFILT) in the model, the value of 16.0 mm/hr was found to reduce about 10 % reduction of surface runoff. For this condition, the reduction effect of Sediment, T-N, and T-P loads were 87.2, 28.5, and 85.1 % respectively. The rice straw surface covering was effective for removing surface runoff dependent loads such as Sediment and T-P.

Keywords

References

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Cited by

  1. Analysis of Effects on Soil Erosion Reduction of Various Best Management Practices at Watershed Scale vol.30, pp.6, 2014, https://doi.org/10.15681/KSWE.2014.30.6.638
  2. HSPF and SWAT Modelling for Identifying Runoff Reduction Effect of Nonpoint Source Pollution by Rice Straw Mulching on Upland Crops vol.55, pp.2, 2013, https://doi.org/10.5389/KSAE.2013.55.2.047