Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
권호 표지

Variation of Water Chemical Components and Estimation of Suitability as the Source for Irrigation Water at Seo-Lake in Suwon

수원 서호의 수질화학성분변화와 농업용수원으로의 적합성 평가

  • Kim, Jin-Ho (Dept. of Environment & Ecology, National Institute of Agricultural Science & Technology) ;
  • Lee, Jong-Sik (Dept. of Environment & Ecology, National Institute of Agricultural Science & Technology) ;
  • Ryu, Jong-Su (Dept. of Environment & Ecology, National Institute of Agricultural Science & Technology) ;
  • Ahn, Eui-Young (Dept. of Environment & Ecology, National Institute of Agricultural Science & Technology) ;
  • Ahn, Seung-Gu (Dept. of Environmental Engineering, the University of Seoul)
  • 김진호 (농업과학기술원 환경생태과) ;
  • 이종식 (농업과학기술원 환경생태과) ;
  • 류종수 (농업과학기술원 환경생태과) ;
  • 안의영 (농업과학기술원 환경생태과) ;
  • 안승구 (서울시립대학교 환경공학부)
  • Published : 2000.09.30
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Abstract

This study was carried out to show the chemical variations of monthly water quality and to estimate the quality as irrigation water at Seo-Lake. The water quality was surveyed at 6 sites for 7 months from May to November in 1999. The average concentration of $COD_{Cr}$ at Seo-Lake was 47.8mg/L. This value meant that the organic matters at the lake would exceed to the crop damage level (50mg/L). Especially, the values in May and in July were 83.07mg/L, 80.64mg/L, respectively. The average concentration of $NH_3-N$ was appeared to 2.84mg/L. But it was shown 5.72mg/L in May. That could put a restraint on the productive power of the crops. It was supposed that happened by eutrophication. And the water pollutant levels were high at stagnation part of the lake. But average water quality of the lake could be used for irrigation. The result showed that the research and the management of water quality were needed to make the lake water more suitable as the source for irrigation.

1999년도에 영농기인 5월부터 12월까지 매월 초에 농업용수로 사용하고 있는 서호에서 수질의 화학성분변화와 농업용수로서의 수질 적합성을 평가하기 위해 본 연구를 수행하였다. $COD_{Cr}$의 경우 평균 47.82mg/L로 나타났으나, 5월과 7월에는 83.07mg/L, 80.64mg/L로 나타났다. 5월의 경우 강우량 감소로 인한 수질의 악화를 7월에는 조류의 번식에 따른 수질악화로 판단된다. $NH_3-N$의 평균농도는 2.84mg/L로 나타났으며, 5월이 5.72mg/L로 조사기간중 가장 높았다. 암모니아 농도의 연변화는 $COD_{Cr}$와 유사한 경향을 나타내었다. 또한 호소내 수질의 오염도는 정체부에서 다른 조사지점들의 농도보다 높았으나, 전반적으로 서호의 수질의 연평균농도는 농작물피해의 기준농도보다 낮았다. 서호 등의 농업용수원으로 사용되는 호소의 지속적으로 양호한 농업용수 수질을 확보하기 위해서는 보다 적극적인 연구 및 관리대책이 필요하다.

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