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Journal of the Korean Society of Hazard Mitigation 2015;15(4):317-323.
Published online August 31, 2015.
침투도랑 수질처리용량 설계
최보경, 조덕준, 이정훈, 김상단
Design of Water Quality Capture Volume for Infiltration Trench
Bogyeong Choe, Deokjun Jo, Jeonghoon Lee, Sangdan Kim
Recently, there has been growing interest in non-point pollutant sources management facilities based on LID concept that is to min-imize the impact of urbanization. In this study the methodology for determining the water quality capture volume (WQCV) for infil-tration trenches which are one of various LID facilities is proposed. The WQCV determined using the principle of diminishing returns is calculated by 18.55 mm, higher than the existing regulation. As the impervious area is increased by 20 percent, the WQCV is increased about 0.3 mm. Effect analysis of the drain time that is installing underdrain is expected to aid in the optimal design of the WQCV. In conclusion, it is shown that the WQCV which is usually applied to economics is closely related to the local precipitation pattern, drainage area imperviousness, and drain time applied to infiltration trenches.
Key Words: LID; Design; Infiltration trenches; LID; Non-point pollutant sources; Water quality capture volume
최근 도시화에 따른 영향을 최소로 하는 LID 개념을 이용한 비점오염저감시설이 관심을 받고 있다. 본 연구에서는 다양한 LID 시설들 중 침투도랑에 관한 수질처리용량 결정을 위한 방법이 제안된다. 경제학에서 주로 응용되는 수확체감의 법칙을 이용하여 수질처리용 량을 산정한 결과 기존의 규정보다 높은 18.55 mm가 산출되었다. 불투수면적이 20% 증가함에 따라 수질처리용량은 약 0.3 mm가 증 가되었다. 배수시간의 영향분석 결과 underdrain 설치는 최적의 수질처리용량 설계에 도움을 줄 것으로 보인다. 결론적으로 해당 지역 의 강수패턴, 유역의 불투수율과 같은 물리적인 특성, 침투도랑의 배수시간 등에 직접적으로 영향을 받고 있음을 살펴볼 수 있다.
핵심용어: 설계; 침투도랑; 비점오염원; 수질처리용량
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