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http://dx.doi.org/10.3741/JKWRA.2016.49.12.981

Development of flood inundation area GIS database for Samsung-1 drainage sector, Seoul, Korea  

Oh, Minkwan (Department of Civil Engineering, Hongik University)
Lee, Dongryul (Korea Institute of Construction Technology, Water Resources Research Division)
Kwon, Hyunhan (Chonbuk National University)
Kim, Dongkyun (Department of Civil Engineering, Hongik University)
Publication Information
Journal of Korea Water Resources Association / v.49, no.12, 2016 , pp. 981-993 More about this Journal
Abstract
This study explains the GIS database of flood inundation area developed for Samsung-1 Drainage Sector, Seoul, Korea. The XP-SWMM dual drainage model was developed for the study area, and the time series observed at the watershed outlet was used to obtain the watershed time of concentration and to calibrate the XP-SWMM model. The rainfall scenario was developed by dividing the 40 minute watershed time of concentration into two 20-minute time steps and then applying the gradually increasing 5 mm/hr interval rainfall intensity to each of the time step up to 200 mm/hr, which is the probable maximum precipitation of the study area. The developed rainfall scenarios was used as the input of the XP-SWMM model to obtain the database of the flood inundation area. The analysis on the developed GIS database revealed that: (1) For the same increment of the rainfall, the increase of the flooded area can be different, and this was caused by topographic characteristics and spatial formation of pipe network of the study area; (2) For the same flooded area, the spatial extent can be significantly different depending on the temporal distribution of rainfall; and (3) For the same amount of the design rainfall, the flood inundation area and the extent can be significantly different depending on the temporal distribution of rainfall.
Keywords
Urban Flood; Warning; Forecast; XP-SWMM;
Citations & Related Records
Times Cited By KSCI : 9  (Citation Analysis)
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