강우유출수 처리목적 인공습지의 강우시 오염물질 저감특성에 관한 연구
Reduction Efficiency of the Stormwater Wetland from Animal Feeding-Lot
0
조회
0
다운로드
8
인용
0
참고문헌
키워드
초록
가축사육지역으로부터 발생되는 강우유출수 처리를 위해 건설된 인공습지에 대해 2010년 5월부터 2011년 11월까지 수행한 20회의 강우시 모니터링을 통하여 얻은 자료를 분석한 결과 강우시 저감효율은 TSS 88%, BOD 54%, CODMn 35%,CODCr 70%, TN 31%, TP 64%이었다. 이론적으로 강우계급의 증가(강우유출량 증가)는 습지의 수리학적 교환비율을 증가시키기 때문에 TSS 저감효율은 감소해야하는데 교환비율이 1에 접근하였을 때 대략 55%의 효율을 달성하였다. 또한 연속적인 강우활동, 개별적인 강우사상의 대소, 강도, 선행건기 일수 등 습지에서는 실험자가 제어할 수 없는 수많은 자연변수들이 복합적으로 작용하기 때문에 처리효율의 변동이 매우 컸다. 효율에 가장 큰 영향을 미친 요인으로는 수리학적요인과 함께 조류증식이 성능 불확실성에 크게 기여하였다.
Abstract
Stormwater wetland targeted to treat the rainfall runoff from cow feeding-lot basin has been monitored from May 2010 to November 2011. Reduction efficiency estimated based on 20 rainfall event monitoring was 88%, 54%, 70%, 31%, and 64%for TSS, BOD, CODCr, TN, and TP, respectively. Theoretically, as rainfall depth increases, hydraulic exchange ratio has to be increased. When the exchange ratio approaches to 1 (usually design goal), TSS reduction efficiency was estimated about 55%. Uncertainty in reduction efficiency of the stormwater wetland is normally very high due to the continuous rainfall activity, its magnitude and intensity, antecedent dry days, and other natural variables which can not be controlled by experiment conductors. In this study, predominant affecting variables was found to be hydraulics caused by consecutive rainfall events having different intensity and algal growth during dry days.
참고문헌 (16)
- Athanas, C., "The use of Artificial Wetlands in Treating Stormwater Runoff", Prepared for the Maryland Sediment and stormwater Administration, pp.66~ (1991)
- Standard Methods for the Examination of water and Wastewater, "APHA", APHA, ~ (1998)
- Results of the Nationwide Urban Runoff Program, U.S Environmental Protection Agency, Vol. I, "EPA.", Water Planning Division, ~ (1983)
- EPA., "Nonpoint sours: Agenda for the Future" (1989), U.S Environmental Protection Agency, Office of Water
- EPA., "National Conference on Urban Runoff Management: Enhancing Urban Watershed Management at the Local, County, and State Levels", 431~ (1993)
- Gavin F. B., "Efficiency of a Constructed Wetland in Removing Contaminants from Stormwater", Wetlands, 24(2), pp.459~466 (2004)
- 김건하, "우리나라 농지-임야유역으로부터의 강우유출수 EMC 부하 분석 및 추정", 대한환경공학회지, 25(6), pp.760~770 (2003), 대한환경공학회
- 이동윤, "도심간선도로의 강우계급별 노면 유출 및 EMC 변화 특성에 관한 연구", 한국수처리학회지, 19(6), pp.105~114 (2011), 한국수처리학회
- 이소영, "교통관련 토지이용에서의 강우계급별 EMC 산정", 한국습지학회지, 11(2), pp.67~76 (2009), 한국습지학회
- Ministry of Environment (MOE), "Certified Analytical Methods of Water Quality", ~ (2008)
- Ministry of Environment(MOE), "Design and Maintenance Guidelines of the Stormwater BMPs", 86~110 (2008)
- Ministry of Environment (MOE), "Final Report: Monitoring and Maintenance Studies of the Stormwater BMPs", ~ (2011)
- Occoquan Watershed Monitoring Lab, "Final Project Report: The Evaluation of a Created Wetland as an Urban Best Management Practice, Northen Virginia Soil and Water Conservation District", 170~ (1990)
- Qitao Yi., "Nonpoint Source Pollution Control Using Constructed Wetland in the Agricultural Area", 박사, pp.2010
- Investigation Report on the Agricultural and Irrigational Water Quality, "Rural Community Corporation (RCC)", Korea Ministry of Agriculture, 1~52 (2004)
- William J. M., "The value of wetlands : importance of scale and landscape setting", Ecological Economics, 35(200), pp.25~33 (2000)