Korean Journal of Hydrosciences
- Volume 5
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- Pages.33-43
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- 1994
Design of Detention Pond and Critical Duration of Design Rainfall in Seoul
- Lee, Jong-Tae (Department of Civil Engineering, Kyonggi University) ;
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Yoon, Sei-Eui
(Department of Civil Engineering, Kyonggi University) ;
- Lee, Jae-Joon (Kumoh National University of Technology, Kumi, Kyung-Buk)
- Published : 1994.06.01
Abstract
This study is to determine the critical duration of design rainfall and to utilize it for the design of detention pond with pump station. To examine the effect of the duration and temporal distribytion of the design rainfall, Huff's quartile method is used for the 9 cases of durations (ranges from 20 to 240 minutes) with ten years return period, and the ILLUDAS model is used for runoff analysis. The storage ratio, which is the ratio of maximum storage amounts to total runoff volume, is introduced to determine the criticalduration of design rainfall. The duration which maximizes the storage ratio is adopted as the critical duration. This study is applied to 18 urban drainage watercheds with pump station in Seoul, of which the range of watershed area is 0.24~12.70
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