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An Analysis on Inundation Characteristics of Urban Watershed according to Variation in Return Period of Design Rainfall
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  • Journal title : Journal of Wetlands Research
  • Volume 15, Issue 4,  2013, pp.585-593
  • Publisher : Korean Wetlands Society
  • DOI : 10.17663/JWR.2013.15.4.585
 Title & Authors
An Analysis on Inundation Characteristics of Urban Watershed according to Variation in Return Period of Design Rainfall
Park, InHyeok; Ha, SungRyong;
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This study aims to investigate inundation characteristics such as inundated area, inundation depth according to variation in return period of design rainfall and to draw a comparison between the inundation characteristics by adapting design storm using dual-drainage model. Lidar data is used to construct terrain data with resolution in Cheongju. The designed storm by return periods(10year, 30year, 50year and 200year) are acquired from Intensity Duration Frequency curve, which are distributed in 5 minutes interval using Huff`s method. As a results, the inundation volume is linearly increased, but inundated area is gradually increased in accordance with swell of return period for design storm. On the other hands, as a result of calculating discharge capacity for each points, deficit of discharge capacity is not observed using designed storm of 10 year return period at every points. If the return period is increased up more than 10 years, both the deficit of discharge capacity for each PT and entire study area are enlarged drastically.
Urban Inundation;Dual Drainage;Sewer Drainage Capacity;DSM(Digital Surface Model);
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