Abstract

본 연구에서는 Storm Water Management Model(SWMM)의 기존 유역폭식의 문제점을 도출하고, 새로운 유역폭식을 개발하여 그 적합성을 가상유역 및 실제유역에 적용하여 분석 제시하였다. 기존 유역폭식의 문제점을 도출하기 위해 유역폭의 이론적 거동특성을 규명하고, 이를 간략화된 가상유역에 적용하여 분석하였다. 본 연구에서 제시한 수정유역폭식은 소유역의 지표면 흐름뿐 아니라 관의 흐름을 고려한 것으로 가상유역에 적용한 결과 기존 유역폭식의 문제점을 개선할 수 있는 것으로 나타났다. 또한, 실제유역에서 개발된 수정유역폭식의 적합성을 검증하기 위해 96.3 ha에 해당하는 군자배수구역 시범지역으로 선정하여 강우사상에 따른 유출량 자료를 실측하였다. 실측된 강우-유출사상에 대해 수정유역폭식을 적용한 결과, 기존 유역폭식보다 보다 정확히 유출을 모의할 수 있는 것으로 나타났다. The objectives of this study are to deduce a problem of existing subcatchment width equation in Storm Water Management Model(SWMM) and to analyze the suitability of a new adjusted subcatchment width equation on both ideally assumed watersheds and an actual urban watershed area. The problems of existing subcatchment equation are issued on the theoretical review of the equation and from the model application on different types of simplified assumed watershed. The adjusted equation, proposed in this study, that considers the pipe flows in addition to the surface flows on small subcatchment can improve the limitation of existing equation when applied on the assumed watersheds. Also, Gunja watershed with 96.3 ha is selected and collected rainfall-runoff events for the feasibility study of the proposed equation on actual urban watershed area. The results represent that the simulated flows from adjusted equation rather than the simulated flows from existing equation are well agreed with observed ones.

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