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Published in: Environmental Earth Sciences 19/2020

01-10-2020 | Original Article

A method for determining reasonable water area ratio based on flood risk and cost-effectiveness in Rainy City

Authors: Jiuhe Bu, Cong Peng, Chunhui Li, Xuan Wang, Yuan Zhang, Zhongwen Yang, Yanpeng Cai

Published in: Environmental Earth Sciences | Issue 19/2020

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Abstract

Urban flooding is increasingly pervasive, with the decreasing water area in cities and the dreadful impact on people. Therefore, it is necessary to carry out a quantitative evaluation of the area of urban water and analyze the threshold of the reasonable water ratio under different drainage scenarios. In this research, simulations were performed by using the Personal Computer Storm Water Management Model (PCSWMM), and the model parameter calibration method was based on the runoff coefficient as a contribution to meeting the data-poor urban areas. Then, urban flood control standards were divided into four classes, and the rainfall scenario once in 200 years and historical maximum were selected to build future extreme inundation scenarios in the case study. Simultaneously, methods for the reasonable water area ratio estimation were decided. The cost-effectiveness of all possible solutions was examined across the two scenarios based on the assessment method. The results show that the range of reasonable ratios of the water area under traditional planning is 5.78–6.02% to meet the standard of urban drainage. Similarly, the range of reasonable ratios of water area under the LID (low impact development) plan combined with the sponge city concept is 5.63–5.88%.

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Metadata
Title
A method for determining reasonable water area ratio based on flood risk and cost-effectiveness in Rainy City
Authors
Jiuhe Bu
Cong Peng
Chunhui Li
Xuan Wang
Yuan Zhang
Zhongwen Yang
Yanpeng Cai
Publication date
01-10-2020
Publisher
Springer Berlin Heidelberg
Published in
Environmental Earth Sciences / Issue 19/2020
Print ISSN: 1866-6280
Electronic ISSN: 1866-6299
DOI
https://doi.org/10.1007/s12665-020-09201-1

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