Journal of the Korean Society of Hazard Mitigation (한국방재학회 논문집)

Korean Society of Hazard Mitigation (한국방재학회)
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Analysis and Prediction on Water Quality Improvements by Aquatic Plants in a Storage

수생식물에 의한 소류지 수질개선 분석 및 예측

  • Received : 2013.10.29
  • Accepted : 2013.11.21
  • Published : 2013.12.31
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Abstract

The different types of influent pollutants due to the urbanization has exceeded the self-purification capacity in storage, and the water quality degradation and ecosystem destruction have been the main concerns in the urban area. Since the selected Garakbawi storage was the leisure area of the local residents, located in Asan-si Tangjung-Myeon where is the newly urbanized area, this study has analyzed the degree of water quality improvement by using eco-friendly aquatic plants. For the qualitative analysis on the water quality improvement abilities of the aquatic plants, the required water surface area was estimated by literatures on the pollutant load removal efficiency with respect to the water quality scenarios such as 10%, 25%, and 30% improvements of TN and TP, which are known as the main reason of eutrophication. This study has also implemented WASP7 model under the above water quality improvement scenarios to predict water pollutant concentrations on the inlet and outlet points of the storage in 2013. The WASP7 simulation results show that the water quality concentrations were improved at the outlet of the storage as about 13.4% of TN and 14.81% of TP under the 10% water quality improvement scenario, as about 22% of both TN and TP under the 25% water quality improvement scenario, and as about 25% of both TN and TP under the 30% water quality improvement scenario, respectively. It would be concluded that the construction of an artificial floating island in Garakbawi storage is not only a good ecofriendly approach for water quality improvements but also the most efficient restoration method.

최근 신도시의 개발에 따라 다양한 오염원이 소류지에 유입되면서 소류지의 자정능력으로는 수질회복이 어려우며 이로 인한 수질악화 및 생태계의 파괴가 우려되고 있다. 대상지역인 가락바위 소류지의 경우 아산시 탕정면의 신도시 개발지역에 위치하고 있으며 인근주민의 휴식장소 등을 제공하고 있어, 자연친화적인 방법인 수생식물을 이용한 수질개선을 효과를 분석하였다. 수생식물의 정략적인 수질오염 저감능력을 확인하기 위하여, 문헌조사의 결과를 바탕으로 가락바위 소류지의 부영양화에 직접적으로 영향을 주는 인자인 TN 및 TP의 농도를 각각 10%, 25%, 30% 저감시킬 수 있는 수생식물의 필요 수면적을 산정하였다. 또한 소류지의 유입부 지점과 유출부 지점에서 2013년 수질상태를 예측하기 위하여 제시된 수질오염 저감 시나리오에 따라 WASP7모형을 모의하였다. 유출부에서의 수질예측결과 10%수질오염 저감시 TN의 경우 13.4%, TP의 경우 14.81% 수질오염을 저감할 수 있었으며, 25%수질오염 저감시 TN 및 TP에서 약 22% 정도, 그리고 30%수질오염 저감시 TN 및 TP에서 약 25%정도 수질오염 농도를 저감할 수 있었다. 본 연구결과를 기초로, 향후 인공식물섬을 설치한다면, 자연친화적으로 가락바위 소류지의 수질을 개선할 뿐만 아니라 생태계복원에도 크게 기여할 것으로 판단된다.

Keywords

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