Load factor of Nonpoint Source Pollutant owing to Land Use in Bangdong Reservoir Watershed

방동저수지 유역의 토지이용에 따른 비점오염 부하발생 원단위 산정

  • Moon, Jong Pil (Graduate School, Chungnam National University) ;
  • Kim, Tai Cheol (Dept. of Agricultural Engineering, College of Agriculture, Chungnarn National University) ;
  • Ahn, Byoung Gi (Dept. of Agricultural Engineering, College of Agriculture, Chungnarn National University)
  • 문종필 (충남대학교 대학원) ;
  • 김태철 (충남대학교 농과대학 농공학과) ;
  • 안병기 (충남대학교 농과대학 농공학과)
  • Published : 1999.12.30

Abstract

The water quality of river has been deteriorated mainly by both point source pollution and nonpoint source pollution from the watershed. Techniques to cut point source pollutants down to the level required have been developed. But, techniques of best management practices to catch the nonpoint source pollutions and to control the routine of pollutants were not successively developed. The quality of closed water system such as reservoir, lake and farm pond is irresistable to being polluted mainly by nonpoint source pollutions. In this study, the population, land use, runoff coefficient, amount of rainfall, and runoff discharge in the watershed were surveyed to investigate the characteristics of water quality such as BOD, COD, SS, T-N, and T-P. After studying the changes of water quality in the viewpoint of land use such as paddy land, residential area, upland, forest and meadow, load factors of nonpoint source pollutant were calculated in Bangdong reservoir watershed. Residential area was more severe than other land use as far as BOD, COD and SS concerned. T-N and T-P released from the paddy and upland were higher than other land use. The 45.9% of total load of nonpoint source pollution was occured during the rainy season.

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