• 한국물환경학회지
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• 제22권5호
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• pp.815-823
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• 2006

The hydrologic cycle in urban catchment has been changed due to the expansion of impervious area by rapid urban development. In this study, the SWMM 5 (Storm Water Management Model 5) model was used to simulate the hydrologic cycle of the Dorimcheon catchment which suffers from the distorted hydrologic cycle as a typical urban catchment. This study compare continuous simulation of urban runoff combining the channel and sewer system with that of channel only in the Dorimcheon catchment. Continuous simulations of urban runoff were performed for the upstream basin of Dorim bridge. The urban impervious regions were processed by the land use analysis from LANDSAT_TM images. It was performed from 1975 to 2000 for every five years. Surface, groundwater and wastewater runoffs were additionally included in the simulations one at a time. Such simulations made it possible to evaluate those components quantitatively. The result of continuous simulation of urban runoff combining the channel and sewer system is that peak flow and recession are well simulated. The analysis results of urbanization effect on runoff are as follows: the surface runoff in 2000 increases to 64% of the whole precipitation whereas the surface runoff in 1975 amounts to 46% of the precipitation; the groundwater runoff in 2000 amounts to 6% and shows 8% decrease during the period from 1975 to 2000.

• 한국수자원학회논문집
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• 제38권6호
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• pp.449-460
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• 2005

본 연구에서는 전형적인 도시하천으로 왜곡된 물순환을 보이는 도림천 유역에 대해서 WEP(Water and Energy transfer Processes) 모형을 이용하여 물순환 모의를 수행하였다. 과거(l975년)와 현재(2000년)의 토지이용도를 이용한 모의를 통해 도시화에 의한 불투수율 증가가 유출특성에 미치는 영향을 분석하였으며, 모의결과 도시의 개발로 인해 과거보다 첨두 도달시간은 감소하고, 첨두 및 총유출량이 증가한 것으로 나타났으며, 침투량과 기저유출량이 감소한 것을 확인할 수 있었다. 또한 왜곡된 물순환을 회복하기 위한 대안으로 침투트랜치와 투수성 포장재의 설치 효과에 대한 모의를 수행하였으며, 모의결과 두 가지 대안을 함께 적용했을 경우에 도시개발 이전의 유출특성에 근접하는 것을 확인할 수 있었다.