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Article

Flood Risk Assessment in Urban Areas of Southern Taiwan

Department of Civil and Disaster Prevention Engineering, National United University, Miao-Li 36063, Taiwan
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Author to whom correspondence should be addressed.
Academic Editors: Marc A. Rosen and George D. Bathrellos
Sustainability 2021, 13(6), 3180; https://0-doi-org.brum.beds.ac.uk/10.3390/su13063180
Received: 31 January 2021 / Revised: 5 March 2021 / Accepted: 12 March 2021 / Published: 14 March 2021
A flood risk assessment of urban areas in Kaohsiung city along the Dianbao River was performed based on flood hazards and social vulnerability. In terms of hazard analysis, a rainfall-runoff model (HEC-HMS) was adopted to simulate discharges in the watershed, and the simulated discharges were utilized as inputs for the inundation model (FLO-2D). Comparisons between the observed and simulated discharges at the Wulilin Bridge flow station during Typhoon Kongrey (2013) and Typhoon Megi (2016) were used for the HEC-HMS model calibration and validation, respectively. The observed water levels at the Changrun Bridge station during Typhoon Kongrey and Typhoon Megi were utilized for the FLO-2D model calibration and validation, respectively. The results indicated that the simulated discharges and water levels reasonably reproduced the observations. The validated model was then applied to predict the inundation depths and extents under 50-, 100-, and 200-year rainfall return periods to form hazard maps. For social vulnerability, the fuzzy Delphi method and the analytic hierarchy process were employed to select the main factors affecting social vulnerability and to yield the weight of each social vulnerability factor. Subsequently, a social vulnerability map was built. A risk map was developed that compiled both flood hazards and social vulnerability levels. Based on the risk map, flood mitigation strategies with structural and nonstructural measures were proposed for consideration by decision-makers. View Full-Text
Keywords: flood risk; hazard; social vulnerability; hydrological and hydrodynamic model; analytic hierarchy process; fuzzy Delphi flood risk; hazard; social vulnerability; hydrological and hydrodynamic model; analytic hierarchy process; fuzzy Delphi
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MDPI and ACS Style

Liu, W.-C.; Hsieh, T.-H.; Liu, H.-M. Flood Risk Assessment in Urban Areas of Southern Taiwan. Sustainability 2021, 13, 3180. https://0-doi-org.brum.beds.ac.uk/10.3390/su13063180

AMA Style

Liu W-C, Hsieh T-H, Liu H-M. Flood Risk Assessment in Urban Areas of Southern Taiwan. Sustainability. 2021; 13(6):3180. https://0-doi-org.brum.beds.ac.uk/10.3390/su13063180

Chicago/Turabian Style

Liu, Wen-Cheng, Tien-Hsiang Hsieh, and Hong-Ming Liu. 2021. "Flood Risk Assessment in Urban Areas of Southern Taiwan" Sustainability 13, no. 6: 3180. https://0-doi-org.brum.beds.ac.uk/10.3390/su13063180

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