Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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The Relationships Between Empirical Factors and Water Quality in Agricultural Reservoirs

농업용 저수지 수질과 경험적 인자들과의 관계

  • Kim, Ho-Sub (National Institute of Environmental Research) ;
  • Choi, Eun-Mi (Department of Environmental Science, Kangwon National University) ;
  • Park, Ju-hyun (National Institute of Environmental Research) ;
  • Hwang, Ha-Sun (National Institute of Environmental Research) ;
  • Kim, Bomchul (Department of Environmental Science, Kangwon National University) ;
  • Kong, Dong-Soo (National Institute of Environmental Research) ;
  • Hwang, Soon-Jin (Department of Environmental Science, Konkuk University)
  • Received : 2008.03.26
  • Accepted : 2008.04.30
  • Published : 2008.05.30
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Abstract

This study was carried out to assay the relationships between empirical factors and water quality in 23 agricultural reservoirs. Based on the trophic state index (TSI) deviation analysis, phosphorus in type II and III was the primary limiting factor on algal growth. BOD, COD, TP and chl.a concentration in type III reservoirs showed higher concentration than those of other types, while SS and TN concentration was no noticeable difference among three types. Characteristics of type III reservoirs showed large reservoir surface and drainage area, large surface area to volume (SAV) ratio, small drainage area to reservoir area (DA/RA) ratio, relatively old age, large paddy field and upland field to drainage area ratio (Mean 17.4%) and high generation and discharge loads compared to other types of reservoirs. In type I and II reservoirs, trends of BOD, TN, TP concentration in water column, were similar to those of the discharge load of pollutants. Although type II reservoirs generally showed low phosphorus discharge loads compared to type I reservoirs, TP and chl.a concentration in water column was greater than that of type I. Characteristics of type II reservoirs showed relatively large SAV ratio and old age compared to type I reservoirs and was similar to those of type III including eutrophic reservoirs.

Keywords

References

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