Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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A Study on Non-point Source Pollutants from Pavement of Coastal Area and Guidance for Selecting BMP

연안지역 포장면 비점오염물질 유출 및 최적관리방안 시설의 선정을 위한 가이던스에 관한 연구

  • Ko, Woong (Dept. of Environmental Engineering, Hanseo University) ;
  • Park, Kisoo (Dept. of Environmental Engineering, Hanseo University) ;
  • Chen, Yaoping (Dept. of Environmental Engineering, Hanseo University) ;
  • Kim, Youngchul (Dept. of Environmental Engineering, Hanseo University)
  • 고웅 (한서대학교 환경공학과) ;
  • 박기수 (한서대학교 환경공학과) ;
  • 진요평 (한서대학교 환경공학과) ;
  • 김영철 (한서대학교 환경공학과)
  • Received : 2013.07.17
  • Accepted : 2013.10.14
  • Published : 2013.11.30
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Abstract

In Korea, there have been many studies and progresses on various types of pilot scale or commercialized field scale Best Management Practices(BMP) during the last 10 years. Runoff characteristics of diffuse pollutants from different land uses are well identified and documented. However, for the coastal area connected directly with shoreline, runoff patterns and management schemes of non-point pollution were not fully studied. Recently, coastal area is emerging as a new development axis especially in west coast side of Korea such as Incheon city and Chungnam province, thus urbanized area rapidly increased but there are no buffer zones and BMP facilities to aim at preventing direct discharge of the first flush into coastal sea and beaches. In this study, parking area in Deacheon harbor, Boryeong City in Chungnam Province was selected and rainfall runoff was monitored for two year period in order to examine run-off features from which proper type of BMP suitable for coastal area is proposed. Coastal area usually has a low ground water level and consists of plain land, so that large scale BMP such as storm water retention pond and wetland requiring great excavation works is not best management plan. In addition, monitoring study shows that storm water from the paved parking area has a high salinity compared with those in storm water from the inland. High salinity is detrimental for the vegetation. Therefore, BMP employing least vegetative cover and also in terms of maintenance is a good option such as infiltration trench and porous pavement.

우리나라에서는 유역 특성별 비점오염물질 유출특성을 파악하고 최적관리방안을 도모하기 위해 2000년 이후 다양한 형태의 실험실 규모 또는 실증 규모 최적관리방안(Best Management Practices, BMP) 시설에 대해 연구가 진행되고 있으나 유역 특성상 자정작용의 기회가 주어지지 않는 연안지역에서의 비점오염물질 유출특성 및 관리방안에 대한 연구는 미비한 상태이다. 최근 연안지역 개발에 따른 불투수층 비율은 지속적으로 증가하고 있으나, 초기우수의 직접유출을 방지하기 위한 완충 시설 및 최적관리방안 시설은 전무한 상태이다. 본 논문에서는 충남 보령시 대천항 주차장을 중심으로 연안 지역의 비점오염물질 유출특성을 파악하고, 이를 저감하기 위한 최적관리방안을 설정하여 연안지역 비점오염원 관리에 대한 기초자료를 제공하였다. 연안지역은 지역특성상 해안과 접하고 있기 때문에 지하수위가 낮고 경사차가 크지 않은 평탄한 지형을 이루고 있다. 즉, 최적관리방안을 선정하는데 있어 유출입구의 수두확보문제와 굴착 깊이에 제한을 받으며, 인공습지 및 저류지와 같은 대규모 저류형 시설의 입지조건으로는 부적합하다. 또한, 연안지역은 강우유출 특성상 염분의 함량이 높기 때문에 식물 생장에 미치는 영향이 커 식생을 이용한 자연형 최적관리방안 시설을 적용하는데도 제약을 받는다. 연안지역 비점오염원 유출 특성과 연안지역 지리 지형적 조건을 고려하여 선정된 최적관리방안 시설의 주관평가 결과 시공시 굴착 깊이가 적고, 식생의 이용이 제한적인 침투수로 형태의 시설이 적합한 것으로 사료되며 유지관리 측면에서도 유리하다.

Keywords

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