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Journal of the Korean Society of Hazard Mitigation 2014;14(1):327-332.
Published online February 28, 2014.
월문천 인공습지의 강우특성에 따른 비점오염원 제거효율 평가
정우진, 이일국, 이시진, 장순웅
Assessment of Constructed Wetland of Removal Efficiency of Non-point Source Pollution by Rainfall Characteristics in Wolmun Stream
Woojin Chung, Ilkook Lee, Sijin Lee, Soonwoong Chang
Abstract
The landuses of urban have various types such as commercial, residential official and industrial areas. The NPS(nonpoint source) pollutants are generally proceeded from pavement areas in urban by human activities. The Korea MOE(Ministry of Environment) is evolving the NPS control system. However, it is not easy to control the NPS and it has uncertain eliminated to watershed. In this study, it was investigated about inflow characteristics of BOD, COD, SS, T-N and T-P by total of 10 monitoring. The event mean concentration (EMC) was calculated for the non-point pollutants reduction rate of constructed wetland(CW). The reduction rates of SS, BOD, COD, T-N and T-P were 83.74%, 76.10%, 73.53%, 50.30% and 59.82%, respectively. It was used to consider the correlation analysis. The BOD and COD value were applied to determine the correlation with total rainfall. The highly correlation with BOD concentration were observed for total rainfall.
Key Words: EMC(evant mean concentration); Constructed wetland; Correlation analysis; Inflow characteristics; Nonpoint source
요지
도시지역은 상업, 주거 및 산업분야 등 다양한 토지의 형태로 존재한다. 비점오염물질은 일반적으로 인간의 활동에 의해 포장지역이 많은 도시지역에서 많이 발생된다. 비점오염원을 제어하기 위해 환경부는 비점오염저감제도를 확립하였다. 그러나 비점오염원의 발생은 불확실하게 유역으로 배출되어져 비점오염원을 제어하기 쉽지 않다. 본 연구에서는 월문천에 설치되어진 비점오염저감시설을 총 10번 모니터링 하여 BOD, COD, SS, T-N과 T-P의 유입특성을 분석, 강우사상과 비점오염원의 상관성, 예측관계식 도출 및 유량가중 평균농도를 이용하여 인공습지의 제거효율을 산정하였다. SS, BOD, COD, T-N과 T-P의 EMC 제거효율은 SS 83.74%, BOD 76.10%, COD 73.53%, T-N 50.30%와 T-P 59.82%로 나타났다. 상관분석결과 총강우량과 BOD, COD가 상관관계를 나타냈으며 BOD가 전체 강우와 높은 상관관계를 나타냈다.
핵심용어: 유량가중평균농도; 인공습지; 상관성분석; 유입특성; 비점오염원
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