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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50555

Title: Assessment of flood mitigation through riparian detention in response to a changing climate – a case study
Authors: Kwan Tun Lee
Pin-Chun Huang
Contributors: 國立臺灣海洋大學:河海工程學系
Keywords: Flood detention
urban flooding
channel-flow routing
overland-flow routing
overbank flow
Date: 2018-10
Issue Date: 2018-10-15T03:41:10Z
Publisher: Journal of Earth System Science
Abstract: Abstract: Considering that urban areas may suffer more substantial losses than riparian farmlands during floods, diverting floodwater into riparian areas for temporal detention is expected to mitigate flood damage in downstream urban areas. In this study, an assessment has been conducted to evaluate the effect of flood mitigation through riparian detention in response to a changing climate in the Tou-Chien River basin of Taiwan. An integrated 1D–2D flow model was used to simulate the movement of flood wave in the main stream and the overbank flow inundating into the nearby lowlands. Based on the numerical simulation results, the flooding extents in the basin corresponding to different return periods of flood using existing flood prevention infrastructures were investigated. A detention strategy by lowering the levee along the riparian farmlands was proposed to avoid severe flooding in the densely populated urban areas of the basin. Research findings showed that the proposed detention measure can completely protect the downstream areas from overbank flooding when a flood having 20-yr period occurs, and can effectively alleviate the downstream flooding area from 27.4 to 7.6km2 for a flood possessing 200-yr period.
Relation: 127
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50555
Appears in Collections:[河海工程學系] 期刊論文

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