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http://dx.doi.org/10.5762/KAIS.2021.22.1.257

Combined Inland-River Operation Technique for Reducing Inundation in Urban Area: The Case of Mokgam Drainage Watershed  

Kwon, Soon Ho (Future and Fusion Lab of Architectural, Civil and Environmental Engineering, Korea University)
Jung, Hyun Woo (Department of Civil, Environmental, and Architectural Engineering, Korea University)
Hwang, Yoon Kwon (Korea Hydro & Nuclear Power Co)
Lee, Eui Hoon (School of Civil Engineering, Chungbuk National University)
Kim, Joong Hoon (School of Civil, Environmental, and Architectural Engineering, Korea University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.22, no.1, 2021 , pp. 257-266 More about this Journal
Abstract
Urban areas can often suffer flood damage because of the more frequent catastrophic rainfall events from climate change. Flood mitigation measures consist of (1) structural and (2) non-structural measures. In this study, the proposed method focused on operating an urban drainage system among non-structural measures. The combined inland-river operation technique estimates the inflow of pump stations based on the water level obtained from a preselected monitoring point, and the pump station expels the stored rainwater to the riverside based on those estimates. In this study, the proposed method was applied to the Mokgam drainage watershed, where catastrophic rainfall events occurred (i.e., 2010- and 2011-years), and severe flood damage was recorded in Seoul. Using the proposed method, the efficiency of flood reduction from the two rainfall events was reduced by 34.9 % and 54.4 %, respectively, compared to the current operation method. Thus, the proposed method can minimize the flood damage in the Mokgam drainage watershed by reserving the additional storage space of a reservoir. In addition, flooding from catastrophic rainfall can be prevented, and citizens' lives and property in urban areas can be protected.
Keywords
Flood Mitigation Measures; Non-stuructural Measures; Combined Inland-River Operation Technique; Monitoring Point; Rating Curve;
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