| Title |
Applicability Analysis of Head Loss Coefficients at Surcharge Manholes for Inundation Analysis in Urban Area |
| Authors |
김채린(Kim, Chae Rin) ; 김정수(Kim, Jung Soo) ; 윤세의(Yoon, Sei Eui) |
| DOI |
https://doi.org/10.12652/Ksce.2018.38.3.0395 |
| Keywords |
배수시스템;침수면적;손실계수;과부하 맨홀 Storm drain system;Inundation area;Head loss coefficient;Surcharged manhole |
| Abstract |
The XP-SWMM model, widely used for inundation analysis of urban watersheds, underestimated the inundation area (range) because the manhole was regarded as a node and the influence of the local loss occurring in the surcharged manhole can not be considered. Therefore, it is necessary to analyze the applicability of the head loss coefficients considering the local loss in the surcharged manholes in inundation analysis using XP-SWMM. The Dorim 1 drainage section of the Dorim-river watershed, where frequent domestic flood damage occurred, was selected as the study watershed. The head loss coefficients of the surcharged manholes estimated from the previous experimental studies were applied to the inundation analysis, and the changes of the inundation area with and without the application of the head loss coefficients with manhole types were compared and analyzed. As a result of inundation simulation with the application of head loss coefficients, the matching rates were increased by 17% in comparison with the without application of them. In addition, the simulated inundation area applied only the head loss coefficients of straight path manholes and applied up to the head loss coefficients of combining manholes ($90^{\circ}$ bend, 3-way, and 4-way) were similar. Therefore, in order to accurately simulate the storm drain system in urban areas, it could be to carry out two-dimensional inundation analysis considering the head loss coefficients at the surcharged manholes. It was expected that the study results will be utilized as basic data for establishing the identification of the inundation risk area. |