건물 높이를 고려한 SWMM 모형의 강우-유출해석 방법 제안
A Rainfall-runoff Analysis Method of SWMM Model Considering Building Height
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초록
본 연구에서는 기존 도시유역 유출해석을 위해 많이 사용되는 SWMM 모형에 초고층 건물의 영향을 고려하는 방법을 제시하였다. 본 연구에서 제시한 방법은 건물의 규모 및 높이를 고려하여 빗물이 지표면에 도달하는 시간을 추가로 계산하고, 이를 반영하여유역폭을 수정하는 방법이다. 본 연구에서 제안한 방법은 Isidoro et al. (2012)의 실험결과를 이용하여 검증하였다. 결과적으로SWMM 모형으로 모의한 유출수문곡선은 실험자료와 전체적으로 잘 일치하여, 본 연구에서 제안한 방법이 유효함을 확인할수 있었다. 두 수문곡선에서 모두 모두 건물의 밀도 증가에 따른 첨두유량의 감소, 첨두시간의 지체 등 유출 반응의 변화가동일한 것을 확인하였다.
Abstract
In this study, the method considering the influence of the high-rise building in urban rainfall-runoff analysis using SWMM was proposed. The method proposed in this study was to calculate the time of reaching the surface of the rainwater considering the size and height of the building, and to modify the basin width to reflect this. In the method proposed in this study, the concentration time considering the size and height of the building is calculated and based on this time the basin width is modified. The proposed method was verified with the experimental result of Isidoro et al. (2012). As a result, the proposed method was found to be valid since the simulated hydrograph was fairly identical to experimental result. In both hydrographs, it was confirmed that the change of the discharge characteristic, such as decrease of peak discharge and lag of peak time, over increasing density of the building was similar each other.
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