Improvement Measures of Pollutants Unit-Loads Estimation for Paddy Fields

논으로부터 배출되는 영양물질 오염부하량 원단위 산정 방법 개선 방안 검토

  • Jung, Jae-Woon (Department of Biosystems & Agricultural Engineering, Chonnam Natational University (Institute of Agricultural Science & Technology, Chonnam National University)) ;
  • Yoon, Kwang-Sik (Department of Biosystems & Agricultural Engineering, Chonnam Natational University (Institute of Agricultural Science & Technology, Chonnam National University)) ;
  • Choi, Woo-Jung (Department of Biosystems & Agricultural Engineering, Chonnam Natational University (Institute of Agricultural Science & Technology, Chonnam National University)) ;
  • Choi, Woo-Young (Department of Biosystems & Agricultural Engineering, Chonnam Natational University (Institute of Agricultural Science & Technology, Chonnam National University)) ;
  • Joo, Seuk-Hun (Korea Rural Community & Agriculture Corporation) ;
  • Lim, Sang-Sun (Department of Biosystems & Agricultural Engineering, Chonnam Natational University (Institute of Agricultural Science & Technology, Chonnam National University)) ;
  • Kwak, Jin-Hyeob (Department of Biosystems & Agricultural Engineering, Chonnam Natational University (Institute of Agricultural Science & Technology, Chonnam National University)) ;
  • Lee, Soo-Hyung (Yeongsan River Environment Research Center, National Institute of Environmental Research) ;
  • Kim, Dong-Ho (Yeongsan River Environment Research Center, National Institute of Environmental Research) ;
  • Chang, Nam-Ik (Yeongsan River Environment Research Center, National Institute of Environmental Research)
  • 정재운 (전남대학교 생물산업공학과(농업과학기술연구소)) ;
  • 윤광식 (전남대학교 생물산업공학과(농업과학기술연구소)) ;
  • 최우정 (전남대학교 생물산업공학과(농업과학기술연구소)) ;
  • 최우영 (전남대학교 생물산업공학과(농업과학기술연구소)) ;
  • 주석훈 (한국농촌공사) ;
  • 임상선 (전남대학교 생물산업공학과(농업과학기술연구소)) ;
  • 곽진협 (전남대학교 생물산업공학과(농업과학기술연구소)) ;
  • 이수형 (국립환경과학원 영산강물환경연구소) ;
  • 김동호 (국립환경과학원 영산강물환경연구소) ;
  • 장남익 (국립환경과학원 영산강물환경연구소)
  • Received : 2008.02.19
  • Accepted : 2008.03.31
  • Published : 2008.05.30

Abstract

Pollutant unit load developed by Ministry of Environment (MOE) in 1995 has been a tool commonly used for water quality management and environmental policy decision. In spite of the convenience of the method in application, the shortcoming of the method has been criticized especially for nonpoint source pollution from paddy field. In this paper the estimation procedures of pollutant unit load from paddy field in the major river basins (Han, Nakdong, Geum, and Youngsan river) were investigated, and some suggestions of improvement measures of the unit-load estimation were made. The investigation showed that the distributions of rainfall, run-off, and run-off ratio, which are the most important factors affecting discharge amount of pollutants, were not similar among river basins. Such differences seemed to result in a greater unit loads estimation at Han river and at Nakdong river watersheds compared to the others. Therefore, it is not likely to be rationale to compare unit load among the watersheds without consideration of such differences. We conclude that estimation of unit-load through an intensive monitoring of pollutant discharge is crucial for better estimation of unit-load. When such an intensive monitoring is not easy due to labor and expense restriction, we suggest that unit-load should be estimated based on the storm-events which is a representative rainfall-runoff event of the area.

Keywords

References

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