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http://dx.doi.org/10.3741/JKWRA.2014.47.9.777

Study on Design Capacity of Stormwater Pipe and Pumping Station considering Peak Rainfall Intensity  

Chung, Gunhui (Department of Civil Engineering, Hoseo University)
Sim, Kyu Bum (Department of Civil Engineering, Sunmoon University)
Kim, Eung Seok (Department of Civil Engineering, Sunmoon University)
Publication Information
Journal of Korea Water Resources Association / v.47, no.9, 2014 , pp. 777-787 More about this Journal
Abstract
Stormwater pipe systems are most commonly used to discharge rainwater from the urban catchment covered by the impervious area. To design stormwater pipe and rainwater pumping station, frequency analysis is implemented using historical rainfall and the design rainfall is timely distributed using theoretical shape such as Huff distribution. This method cannot consider the rainfall intensity variation caused by climate change which is type of uncertainty. Therefore, in this study, runoff from Gasan1 stormwater pumping stations catchment is calculated using design rainfall distributed by the 2nd quartile distribution method and the historical rainfall events. From the analysis, the nodal flooding in the urban catchment is likely caused by the high peak rainfall event rather than the large amount of rainfall. The linear regression analysis is implemented. As a result, when several storms have the same amount of rainfall, the nodal flooding in the stormwater pipe systems could be caused by the high peak of storm events. Since as the storm duration become short, the peak rainfall become high, the nodal flooding likely become severe with the short storm duration. The uncertainty in the peak data of design rainfall is analyzed and this uncertainty has to be consider in the stormwater pipe design process.
Keywords
design rainfall; peak rainfall intensity; stormwater pipe systems; design capacity of stormwater pumping station; uncertainty;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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