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In order to defend flooding in urban and industrial areas, structural and non-structural flood control measures can be performed through the installation and operation of hydraulic structures. In this study, operation of urban drainage pumping station and detention storage were utilized to protect the flooding as non-structural measures. To quantify flooding characteristics of non-structural operations, the new terminology, critical flooding node is introduced using EPA-SWMM model. The critical flooding nodes can be defined as locations that cannot defend inland flood by operation of non-structural measures. For the analysis, three scenarios were considered as rainwater pump station operation, detention storage operation, combine operation of rainwater pump station and detention storage. As a result of analysis, rainwater pump station operated at low operating water level and detention storage showed the least amount of flooding occurred when operated at high operating water level. And, non-structural operations can not be defended area of Minimum 4.12% to Maximum 36.77%. The determined locations can be selected as the priority inland flood defended area.

Suggestion of Critical Flooding Node Calculation Method Considering Non-structural Operation in Daerim 3 Urban Drainage Area