대심도배수시설을 가진 도시유역에서의 치수계획 수립방법

Abstract

A conventional concept of the flood management in urban watersheds are forced to be modified/changed since the magnitude and frequency of the urban flood have been increased due to climate change and land use change. This study proposed a method to establish a flood management in an urban watershed with pump station and underground sluiceway. The proposed method calculate the design magnitude using an urban inundation model(XP-SWMM 2011), rainfall matrix, and flood characteristic values. The calibration of the model were conducted as regulating the energy loss coefficient of bended conduits and comparing with inundation depth observed on September 21, 2010. As a result of preliminary simulation, the underground sluiceway was effective to decrease inundation, however a peak discharge of pump station was increased. Case studies were carried out in Ogeum and Moc-dong pump station basin with 5 scenarios which were composed of combination of sluiceway conditions and pump station operation rules. As the results, this study proposed the principal parameters which have to be considered for flood management and reasonable operation rules of pump station in an urban watershed with under ground sluiceway.