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Article

Design Combination Optimized Approach for Urban Stormwater and Drainage Systems Using Copula-Based Method

1
School of Geography and Planning, Sun Yat-Sen University, Guangzhou 510006, China
2
China Water Resources Pearl River Planning, Surveying & Designing Co., Ltd., Guangzhou 510610, China
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Author to whom correspondence should be addressed.
Academic Editor: Maria Mimikou
Water 2022, 14(11), 1717; https://doi.org/10.3390/w14111717
Received: 28 March 2022 / Revised: 8 May 2022 / Accepted: 20 May 2022 / Published: 27 May 2022
(This article belongs to the Special Issue Urban Water Security and Sustainable Development)
Waterlogging disasters cause huge loss of life and property damage every year. In this research, a Copula-based optimization method is proposed to solve the problems in bivariate design of urban stormwater and drainage systems resulting from ignorance of precipitation temporal dependence and discrepancy between different design codes. Optimized design combinations of stormwater and drainage systems conditioned on given Kendall bivariate return periods or return periods of either system can be obtained using the optimization method for the case study of Zhongshan and Zhuhai. Results show that the temporal dependencies between precipitation series with different durations should be carefully considered, which can be sufficiently described by Copula functions. Based on the optimized design combinations, it is found that the planned return periods of stormwater systems in Sponge City Plans are underestimated for both Zhongshan and Zhuhai, which restricts the full use of the drainage systems. According to the optimized results, the planned return periods of stormwater systems in Zhongshan (Zhuhai) should be adjusted to 8.04 a (6.76 a) for the downtown area and 6.52 a (5.59 a) for other areas, conditioned on the planned return periods for P24 h in Sponge City Plans. The proposed optimization method provides a useful approach for the bivariate design of stormwater and drainage systems. The results of this research can give stakeholders references in compiling engineering plans for urban waterlogging prevention and help better balance the conflicts between waterlogging safety and economic efficiency. View Full-Text
Keywords: bivariate design optimization; stormwater system; drainage system; copula; waterlogging prevention bivariate design optimization; stormwater system; drainage system; copula; waterlogging prevention
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MDPI and ACS Style

Zhong, Y.; Liao, X.; Yi, L.; Wang, D.; Wu, L.; Li, Y. Design Combination Optimized Approach for Urban Stormwater and Drainage Systems Using Copula-Based Method. Water 2022, 14, 1717. https://doi.org/10.3390/w14111717

AMA Style

Zhong Y, Liao X, Yi L, Wang D, Wu L, Li Y. Design Combination Optimized Approach for Urban Stormwater and Drainage Systems Using Copula-Based Method. Water. 2022; 14(11):1717. https://doi.org/10.3390/w14111717

Chicago/Turabian Style

Zhong, Yixuan, Xiaolong Liao, Ling Yi, Dagang Wang, Leping Wu, and Yuanyuan Li. 2022. "Design Combination Optimized Approach for Urban Stormwater and Drainage Systems Using Copula-Based Method" Water 14, no. 11: 1717. https://doi.org/10.3390/w14111717

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