농업용 저수지 수질개선을 위한 국내 인공습지 설계 및 시공실태 조사
Investigation on Design Aspects of the Constructed Wetlands for Agricultural Reservoirs Treatment in Korea
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초록
인공습지는 농업용 저수지의 수질개선을 위하여 많은 곳에 적용되고 있다. 인공습지는 수심분포, 유입량 및 유출량, 물흐름 분포, 체류시간, 수질 처리효율, 종횡비, 개방수역/폐쇄수역 구성비 등이 중요한 설계인자이다. 특히, 인공습지 높은 효율 증대를 위해서는 취입보 형식, 유입보, 인입수로 길이, 셀(Cell) 형태, 셀 연결 형태 등의 설계는 매우 중요하다. 본 연구는 농업용 저수지에 조성되어 운영중인 23개 인공습지의 현장조사를 통하여 설계시 고려하여야 할 인자 및 효율적 운영방안을 제시하고자 수행되었다. 인공습지 중에서 비정상적 운영이 나타나는 습지는 수위센서 미작동, 취입보 내부의 유사퇴적 및 기계식 수문틀의 협잡물 문제가 중요한 원인으로 나타났다. 또한, 인입수로의 길이가 길어질수록 취입보 하류부와 상류부의 생태적 단절구간이 늘어나는 것도 문제점으로 분석되었다. 습지 대부분은 2~5개의 셀로 조성되었으며 셀의 크기가 지나치게 클 경우 수리학적 효율이 떨어지고 관리가 어려운 것으로 평가되었다. 작은 규모의 습지에 많은 셀이 존재하는 경우 큰 수두손실로 인하여 적절한 유수흐름이 나타나지 않는 것으로 평가되었다.
Abstract
To improve the water quality of agricultural reservoirs, constructed wetlands are applied in many places. These are technologies that establish ecosystems and important design factors include water depth distribution, inflow and outflow, water flow distribution, hydraulic residence time, water quality treatment efficiency, aspect ratio, and the distribution of open water and covered water surfaces. For high efficiency during the operation of a constructed wetland, the design needs to be optimized and this requires consideration of the different types and length of the intake dam as well as the type and connection of wetland cells. Therefore, this study was conducted to investigate and suggest factors that needs to be considered during the design and for efficient operation measures through field surveys of 23 constructed wetlands that have been established and operated in agricultural reservoirs. Results of the field investigation shows that several sites were being operated improperly due to the malfunctioning or failure of the water level sensors, sedimentation in the intake dam, and clogging of the mechanical sluice frames. In addition, it was found that as the length of the inlet channel increases, the ecological disconnection between the intake dam upstream and the wetland outlet downstream also increases and was identified as a problem. Most of the wetlands are composed of 2 to 5 cells which can result to poor hydraulic efficiency and difficulty in management if they are too large. Moreover, it was found that the flow through a small wetland can be inadequate when there are too many cells due to excessive amounts of headloss.
참고문헌 (28)
- 조현석, "우리나라 저수지 수질에 미치는 수문지형 및 유역 토지피복의 영향", Ecology and Resilient Infrastructure, 6(2), pp.79~88 (2019), 응용생태공학회[DOI]
- 최광순, "국내 10개 댐저수지 인공습지의 운영현황 및 개선방안", 한국습지학회지, 16(3), pp.431~440 (2014), 한국습지학회
- 최혜선, "도시지역에 적용된 LID 기법의 강우시 수문특성 및 물순환 평가", 한국습지학회지, 21(3), pp.191~198 (2019), 한국습지학회
- Choi H. S., "Ecological Value Analysis and Development of a Comprehensive Evaluation Index for Constructed Wetlands", Ph. D., pp.2021
- Fonseca A., "Integrating water quality responses to best management practices in Portugal", Environmental Science and Pollution Research, 25(2), pp.1587~1596 (2018)[DOI]
- 2.0.CO;2,
- Gu, Q., "Assessment of reservoir water quality using multivariate statistical techniques : a case study of Qiandao Lake, China", Sustainability, 8(3), pp.243~ (2016)[DOI]
- Hwang, S. J., "Moderating effects of the geometry of reservoirs on the relation between urban land use and water quality", Landscape and Urban Planning, 82(4), pp.175~183 (2007)[DOI]
- 강형식, "여의도 샛강 흐름 정체와 수질악화 원인 분석", 대한토목학회논문집(국문), 39(1), pp.25~32 (2019), 대한토목학회[DOI]
- Kasak, K., "Efficiency of a newly established in-stream constructed wetland treating diffuse agricultural pollution", Ecological Engineering, 119, pp.1~7 (2018)[DOI]
- 김봉균, "호소의 수질개선을 위하여 설치한 부댐의 장기간 성능평가", 한국산학기술학회논문지, 19(10), pp.668~676 (2018), 한국산학기술학회[DOI]
- Kim, I.H., "Agricultural appeal water quality management system", Magazine of the Korean Society of Agricultural Engineers, 52(2), pp.2~9 (2010)
- 고대현, "인공습지에서 오염물질 제거기작 및 국내외 연구동향", 대한환경공학회지, 32(4), pp.379~392 (2010), 대한환경공학회
- Manual for designing and managing constructed wetlands to improve agricultural water quality, "Korea Rural Community Corporation", Korea Rural Community Corporation, ~ (2004)
- Derivation of design elements and factors for each agricultural water quality improvement method, "Korea Rural Community Corporation", Korea Rural Community Corporation, ~ (2017)
- Land, M., "How effective are created or restored freshwater wetlands for nitrogen and phosphorus removal? A systematic review", Environmental Evidence, 5(1), pp.1~26 (2016)[DOI]
- Lee, C. G., "Nitrogen removal in constructed wetland systems", Engineering in Life Sciences, 9(1), pp.11~22 (2009)[DOI]
- F. Masi, "The role of constructed wetlands in a new circular economy, resource oriented, and ecosystem services paradigm", Journal of Environmental Management, 216, pp.275~284 (2018), Elsevier BV[DOI]
- Metcalf, L., "Wastewater engineering: treatment, disposal, and reuse (Vol. 4)" (1991), McGraw-Hill
- Water Vision 2020(2001-2020), "Ministry of Land, Infrastructure and Transport", 7~131 (2020)
- Ministry of Agriculture, Food and Rural Affairs, "Korea Rural Community Corporation, 2017 Agricultural Water Monitoring Results", Korea Rural Community Corporation, 69~71 (2017)
- The 2nd Basic Water Environment Management Plan (2016-2025), "Ministry of Environment", Ministry of Environment, ~ (2017)
- 오상근, "영산강수계 농업용 저수지의 수질 특성", 한국환경기술학회지, 21(1), pp.15~23 (2020), 한국환경기술학회
- 박창근, "논용수 수요량 산정을 중심으로 한 농업용수 수요량 산정방법의 개선", 한국수자원학회 논문집, 53(11), pp.939~949 (2020), 한국수자원학회[DOI]
- 신은철, "소규모 농업용 저수지의 안전관리 개선 방향", 한국지반신소재학회 논문집, 11(3), pp.53~58 (2012), 한국지반신소재학회
- 유기경, "주차장 비점오염원 관리를 위한 식생체류지 개발 및 평가", 한국습지학회지, 17(3), pp.221~227 (2015), 한국습지학회
- Vymazal, J., "The use of constructed wetlands for treatment of drainage from agricultural fields", Vodni hospodářství(Water Management), 66(2016), pp.5~7 (2016)
- Vymazal, J., "The use of constructed wetlands for nitrogen removal from agricultural drainage : a review", Scientia agriculturae bohemica, 48(2), pp.82~91 (2017)