Pollutant Characteristics of Nonpoint Source Runoff in Okcheon Stream

강우시 소옥천에서의 비점오염원 유출 특성

  • Oh, Young-Taek (Department of Environmental Engineering Kumoh National University) ;
  • Park, Je-Chul (Department of Environmental Engineering Kumoh National University) ;
  • Kim, Dong-Sup (Korea Water Resource Corporation Water Resources Research Institute) ;
  • Rhyu, Jae Keun (Korean Institute of Environmental Science and Technology)
  • 오영택 (금오공과대학교 환경공학과) ;
  • 박제철 (금오공과대학교 환경공학과) ;
  • 김동섭 (한국수자원공사 수자원연구소) ;
  • 류재근 (한국환경기술진흥원)
  • Received : 2004.09.03
  • Accepted : 2004.10.20
  • Published : 2004.11.30

Abstract

The aims of this study are the characterization of runoff from nonpoint source, the analysis of the pollutant loads and an establishment of a management plan for nonpoint source of Okcheon. For this purpose the basin of the stream So-okcheon was selected to the investigated. During the period from May 29 to July 21 in 2003, the water automatic sampler system has been installed in Okkagkyo and parameters such as SS, COD, TOC, TP and TN were analyzed. The pollutants of nonpoint source seem to be washed out along the stream water in the beginning of rainfall, remain in water and cause the stream pollution. The runoffs during heavy rainfall, especially, much higher concentration of SS than those during dry period. With respect to the annual loading of pollutants of the nonpoint source, the COD was 124 ton/yr, TOC 396 ton/yr, TN 1,429 ton/yr and TP 4.2 ton/yr in the year 2002. With respect to the pollutants loading of the nonpoint source, the COD was 375 ton/yr(95% of the total COD loading of 394 ton/yr), TOC 844 ton/yr(96% of the tatal TOC loading of 876 ton/yr), TN 1,985 ton/yr(96% of the total TN loading of 2,062 ton/yr) and TP 37.1 ton/yr(92% of the total TP loading of 40.3 ton/yr) in the year 2003.

Keywords

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