Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Estimation of BOD Loading of Diffuse Pollution from Agricultural-Forestry Watersheds

농지-임야 유역의 비점원 발생 BOD 부하의 추정

  • Kim, Geonha (Department of Civil and Environmental Engineering, Hannam University) ;
  • Kwon, Sehyug (Department of Information and Statistics, Hannam University)
  • 김건하 (한남대학교 토목환경공학과) ;
  • 권세혁 (한남대학교 정보통계학과)
  • Received : 2005.06.28
  • Accepted : 2005.08.08
  • Published : 2005.11.30
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Abstract

Forestry and agricultural land uses constitute 85% of Korea and these land uses are typically mixed in many watersheds. Biological Oxygen Demand (BOD) concentration is a primary factor for managing water qualities of the water resources in Korea. BOD loadings from diffuse sources, however, not well monitored yet. This study aims to assess BOD loadings from diffuse sources and their affecting factors to conserve quality of water resources. Event Mean Concentration (EMC) of BOD was calculated based on the monitoring data of forty rainfall events at four agricultural-forestry watersheds. Exceedence cumulative probability of BOD EMCs were plotted to show agricultural activities in a watershed impacts on the magnitude of EMCs. Prediction equation for each rainfall event was proposed to estimate BOD EMCs: $EMC_{BOD}(mg/L)=EXP(0.413+0.0000001157{\times}$(discharged runoff volume in $m^3$)+0.018${\times}$(ratio of agricultural land use to total watershed area).

Keywords

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