Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Discharge of the Pollutants from Rice Paddies during the Period of Cultivation

경작기 농경배수에 의한 오염물질의 배출

  • An, Ik-Sung (Department of Environmental Engineering, Cheonbuk National University) ;
  • Kim, Youngchul (Department of Environmental Engineering, Hanseo University) ;
  • Lee, Dong-Ryul (Korea Institute of Construction Technology, Water Resources Research Department)
  • 안익성 (전북대학교 환경공학과) ;
  • 김영철 (한서대학교 환경공학과) ;
  • 이동률 (한국건설기술연구원 수자원환경연구부)
  • Received : 2006.12.26
  • Accepted : 2007.03.05
  • Published : 2007.03.30
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Abstract

In this study, discharge of the pollutants from the rice paddies during cultivation and its pattern were investigated. The pH in the returned and rainfall water from ten different paddies was between 6.9 and 7.4, which is not associated with the cultivation time and farming style of individual paddy. TN and TP concentrations were highest in the beginning of first top dressing (fertilization), which indicates that proper top dressing and returned water management is crucial to reduce their discharge loads. In particular, TN concentration was more or less constant until tillering stage. This is thought to be due to the runoff of soil-adsorbed nitrogen and compost. Average SS concentration in the returned and rainfall water was 28 mg/L, and organics was predominantly soluble form, and highest COD 25 mg/L during transplanting, lowest 11.3 mg/L and average 11.3 mg/L. Density of TC (total coliform bacteria) was from 1000/100 mL to 114,000/100 mL and FC (fecal coliform) was 5 to 16% of TC density.

Keywords

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