Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Characteristics of Biochemical Oxygen Demand Export from Paddy Fields during Storm and Non-storm Period and Evaluation of Unit Load

강우시와 비강우시 BOD 유출 특성 조사 및 원단위 평가

  • Choi, Dongho (Climate Change and Agroecology Division, National Academy of Agricultural Science) ;
  • Cho, Sohyun (Yeongsan River Environment Research Center) ;
  • Hwang, Taehee (Yeongsan River Environment Research Center) ;
  • Kim, Youngsuk (Yeongsan River Environment Research Center) ;
  • Jung, Jaewoon (Jeollanamdo Environmental Industries Promotion Institute) ;
  • Choi, Woojung (Dept. of Rural & Bio-systems Engineering, Chonnam National University) ;
  • Park, Hyunkyu (Dept. of Rural & Bio-systems Engineering, Chonnam National University) ;
  • Yoon, Kwangsik (Dept. of Rural & Bio-systems Engineering, Chonnam National University)
  • 최동호 (국립농업과학원 기후변화생태과) ;
  • 조소현 (국립환경과학원 영산강물환경연구소) ;
  • 황태희 (국립환경과학원 영산강물환경연구소) ;
  • 김영석 (국립환경과학원 영산강물환경연구소) ;
  • 정재운 (전라남도 환경산업진흥원) ;
  • 최우정 (전남대학교 지역.바이오시스템공학과) ;
  • 박현규 (전남대학교 지역.바이오시스템공학과) ;
  • 윤광식 (전남대학교 지역.바이오시스템공학과)
  • Received : 2017.03.31
  • Accepted : 2017.07.28
  • Published : 2017.09.30
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Abstract

The biologic Oxygen Demand (BOD) is a reliable and generally accepted indicator of water pollution by organic pollutants. Accordingly, estimation of BOD export from paddies carries important implications fwith regard to water management in rural areas. In this study, hydrology and BOD concentration were monitored during the period 2008 through 2012, in an effort to understand the characteristics of BOD export from paddy fields. The findings demonstrated that BOD load by rainfall above 50 mm. occupied about 50 % of total load, whereas the load by less than ten mm. rainfall occupied about 29 % of the total load during periods of stormy activity. It therefore seems that it could be possible to reduce the BOD load up to 29 % during storm periods, when drainage control conducted for rainfall less than ten mm.(an amount which is relatively easy to manage). The documented mean loads of storm and non-storm were $17.1kg\;ha^{-1}\;yr^{-1}$ and $11.2kg\;ha^{-1}\;yr^{-1}$, respectively. The BOD load during the significant rainfall period was similar to the renewed unit load by NIER (2014). However, there were substantial differences between unit load and actual load when the non-storm load was incorporated into the BOD load estimation from paddy fields. In view of the foregoing, it is felt that, the non-storm load needs to be further considered and managed for the successful implementation of Total Maximum Daily Load (TMDL) program.

Keywords

References

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