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대청호 유역 비점오염원 제어를 위한 생태습지의 오염물질 제거효율 평가
Evaluation of Removal Efficiency of Pollutants in Constructed Wetlands for Controlling Nonpoint Sources in the Daechung Reservoir Watershed 원문보기

생태와 환경 = Korean journal of ecology and environment, v.56 no.2, 2023년, pp.127 - 139  

박별님 ,  조영철 (충북대학교 환경공학과)

초록
AI-Helper 아이콘AI-Helper

대청호는 유역에 있는 비점오염원으로부터 유입되는 오염물질로 인해 남조류 과다증식에 기인한 녹조가 빈번하게 발생하고 있다. 이에 녹조 관리 대책 중 하나로 인공습지를 설치하여 호소에 유입되는 오염물질을 저감하고 있다. 본 연구에서는 비점오염원의 관리방법으로 인공습지의 적용 가능성을 평가하기 위해 대청호 상류에 설치된 서화천 생태습지를 대상으로 2014년부터 2020년까지 유입수 및 유출수의 BOD, COD, SS, T-N, T-P 등 오염물질 농도를 분석하였다. 분석 결과 대체적으로 인공습지에서의 처리를 통해 오염물질의 농도가 감소하는 것이 확인되었으며, 특히, 유기물질보다 질소, 인과 같은 영양염류에 있어 높은 처리효율이 확인되었다. 유입수의 오염물질 농도에 따른 처리효율을 구간을 나누어 분석한 결과 대체적으로 고농도에서 처리효율이 높은 경향을 나타내었다. 설치 및 운영 경과에 따른 연도별 인공습지 처리효율을 분석한 결과, T-P에서 큰 변화가 확인되었다. 이는 인공습지 조성 초기에는 식생의 성장에 따라 높은 처리효율을 보였지만, 식생이 안정화되고 습지 퇴적층이 포화됨에 따라 처리효율이 점진적으로 감소한 결과로 판단된다. 본 연구의 결과는 초기 강우 등 높은 농도의 오염물질 유입 및 주기적인 퇴적토 준설 등의 관리가 이루어진다면 인공습지가 유역면적이 넓고, 비점오염원의 영향을 크게 받는 댐 저수지의 부영양화 억제에 유용한 수단이 될 수 있음을 보여준다.

Abstract ▼ AI-Helper 아이콘AI-Helper

Daechung Reservoir has been suffering from severe cyanobacterial blooming periodically due to the water pollutants from the watershed, especially nutrients from nonpoint sources. As a countermeasure, an artificial wetland was constructed to mitigate the pollutant load from the watershed by utilizing...

주제어

#cyanobacterial blooming   #constructed wetland   #water treatment   #vegetation   #Daechung Reservoir  

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