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    题名: AI-based design of urban stormwater detention facilities accounting for carryover storage
    作者: Yang, Shun-Nien;Chang, Li-Chiu;Chang, Fi-John
    关键词: Real-time urban flood control;Flood risk mitigation;Pump operation rules;Multi-objective optimization;Non-dominated sorting genetic algorithm-II (NSGA-II)
    日期: 2019-08
    上传时间: 2020-03-16 12:10:24 (UTC+8)
    摘要: Rapid urbanization in metropolitan areas easily triggers flashy floods. Urban drainage systems conveying stormwater out of cities are key infrastructure elements for flood mitigation. This study develops an intelligent urban flood drainage system accounting for carryover storage through optimizing the multi-objective operation rules of pumping stations for effectual flood management in Taipei City. The Yu-Cheng pumping station constitutes the study case, and a large number of datasets collected from 17 typhoon/storm events are adopted for model construction and validation. Three objective functions are designed to minimize: (1) the sum of water level fluctuations in the flood storage pond (FSP); (2) the sum of peak FSP water levels; and (3) the mean absolute difference of pump switches between two consecutive times along operation sequence. The non-dominated sorting genetic algorithm II (NSGA-II) is applied to searching the Pareto-optimal solutions that optimize the trade-off between the objectives. We next formulate the optimal operation rules through a two-tier sorting process based on a compromised Pareto-optimal solution. The comparison of the simulated results obtained from both the optimal operation rules and current operation rules indicate that the optimal operation rules outperform current operation rules for all three objectives, with improvement rates reaching 43% (OBJ1), 3% (OBJ2) and 71% (OBJ3), respectively. We demonstrate that the derived intelligent urban flood drainage system can serve as reliable and efficient operational strategies for urban flood management and flood risk mitigation.
    關聯: Journal of Hydrology 575, p.1111-1122
    DOI: 10.1016/j.jhydrol.2019.06.009
    显示于类别:[水資源及環境工程學系暨研究所] 期刊論文

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