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Flood Simulation for Basin-Shaped Urban Watershed Considering Surface Flow
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 Title & Authors
Flood Simulation for Basin-Shaped Urban Watershed Considering Surface Flow
Ahn, Jeonghwan; Cho, Woncheol; Jung, Jaehee;
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 Abstract
Urban runoff models have been continuously developing with concerns for urban flood. Recently, models that be able to quantitatively analyze surface inundation caused by overflowed water from storm sewer were also developed by coupling 1-dimensional sewer model and 2-dimensional surface flow model. However, only overflowed water from storm sewer can be analyzed by the models have been developed until now. They are limited to be not able to analyze surface inundation caused by surface runoff that could not flow into the storm sewer. In order to overcome the limitation, basin-overlap method was devised adding a dummy 1-dimensional sewer layer to the model, so it can consider the efficiency of inflow to the storm sewer system. XP-SWMM 2011 is applied for urban runoff model and the flood event occurred on July 27, 2011 in basin-shaped Sadangcheon watershed is chosen for study inundation event. According to simulation results basin-overlap method reappear the observed inundation event more precisely than traditional method. This results suggest that drainage system has to be improved for reducing inundation caused by surface runoff and would be used as considerations for planning an urban basin design magnitude.
 Keywords
XP-SWMM 2011 model;Basin-overlap method;Flood characteristic values;Surface flow;Surface slope;Inflow efficiency;
 Language
Korean
 Cited by
1.
과부하 맨홀의 손실계수를 고려한 도시지역 침수해석,이원;김정수;윤세의;

한국수자원학회논문집, 2015. vol.48. 2, pp.127-136 crossref(new window)
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