• DOI:10.12652/KSCE.2014.34.3.0841
• Corpus ID: 133577494

Flood Simulation for Basin-Shaped Urban Watershed Considering Surface Flow

@inproceedings{Ahn2014FloodSF,
  title={Flood Simulation for Basin-Shaped Urban Watershed Considering Surface Flow},
  author={Jeonghwan Ahn and Woncheol Cho and Jaehee Jung},
  year={2014},
  url={https://api.semanticscholar.org/CorpusID:133577494}
}

• Jeonghwan Ahn, Woncheol Cho, Jaehee Jung
• Published 2014
• Environmental Science, Engineering

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… 

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.