| Title |
A Study on Urban Inundation Prediction Using Urban Runoff Model and Flood Inundation Model |
| Authors |
탁용훈(Tak, Yong Hun) ; 김재동(Kim, Jae Dong) ; 김영도(Kim, Young Do) ; 강부식(Kang, Boosik) |
| DOI |
https://doi.org/10.12652/Ksce.2016.36.3.0395 |
| Keywords |
도시유역;내수침수;홍수량;홍수범람해석 Urban basin;Internal inundation;Flood damage;SWMM;Flood inundation analysis |
| Abstract |
Population and development are concentrated by urbanization. Consequently, the usage of underground area and the riverside area have been increased. By increasing impermeable layer, the urban basin drainage is depending on level of sewer. Flood damage is occurred by shortage of sewer capacity and poor interior drainage at river stage. Many of researches about flood stress the unavailability of connection at the river stage with the internal inundation organically. In this study, flood calculated considering rainfall and combined inland-river. Also, using urban runoff model analyze the overflow of sewer. By using results of SWMM model, using flood inundation analysis model analyzed internal drainage efficiency of drainage system. Applying SWMM model, which results to flood inundation analysis model, analyzes internal drainage efficiency of drainage system under localized heavy rain in a basin of the city. The results of SWMM model show the smoothness of internal drainage can be impossible to achieve because of the influence of the river level and sewer overflow appearing. The main manholes were selected as the manhole of a lot of overflow volume. Overflow reduction scenarios were selected for expansion of sewer conduit and instruction retention pond. Overflow volume reduces to 45% and 33~64% by retention pond instruction and sewer conduit expansion. In addition, the results of simulating of flood inundation analysis model show the flood occurrence by road runoff moving along the road slope. Flooded area reduces to 19.6%, 60.5% in sewer conduit expansion scenarios. |