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http://dx.doi.org/10.11001/jksww.2021.35.6.389

Risk assessment for inland flooding in a small urban catchment : Focusing on the temporal distribution of rainfall and dual drainage model  

Lee, Jaehyun (Department of Civil Engineering, Chung-Ang University)
Park, Kihong (Department of Civil Engineering, Chung-Ang University)
Jun, Changhyun (School of Civil and Environmental Engineering, Chung-Ang University)
Oh, Jeill (School of Civil and Environmental Engineering, Chung-Ang University)
Publication Information
Journal of Korean Society of Water and Wastewater / v.35, no.6, 2021 , pp. 389-403 More about this Journal
Abstract
In this study, dual drainage system based runoff model was established for W-drainage area in G-si, and considering the various rainfall characteristics determined using Huff and Mononobe methods, the degree of flooding in the target area was analyzed and the risk was compared and analyzed through the risk matrix method. As a result, the Monobe method compared to the Huff method was analyzed to be suitable analysis for flooding of recent heavy rain, and the validity of the dynamic risk assessment considering the weight of the occurrence probability as the return period was verified through the risk matrix-based analysis. However, since the definition and estimating criteria of the flood risk matrix proposed in this study are based on the return period for extreme rainfall and the depth of flooding according to the results of applying the dual drainage model, there is a limitation in that it is difficult to consider the main factors which are direct impact on inland flooding such as city maintenance and life protection functions. In the future, if various factors affecting inland flood damage are reflected in addition to the amount of flood damage, the flood risk matrix concept proposed in this study can be used as basic information for preparation and prevention of inland flooding, as well as it is judged that it can be considered as a major evaluation item in the selection of the priority management area for sewage maintenance for countermeasures against inland flooding.
Keywords
Dual drainage model; Inland flooding; Return period; Risk assessment; Risk matrix; Temporal distribution of rainfall;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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