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Urban rainstorm and waterlogging scenario simulation based on SWMM under changing environment

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Abstract

Urban rainstorm and waterlogging occurred more frequently in recent years, causing huge economic losses and serious social harms. Accurate rainstorm and waterlogging simulation is of significant value for disaster prevention and mitigation. This paper proposed a numerical model for urban rainstorm and waterlogging based on the Storm Water Management Model (SWMM) and Geographic Information System (GIS), and the model was applied in Lianhu district of Xi’an city of China. Furthermore, the effects of rainfall characteristics, pipe network implementation level and urbanization level on waterlogging were explored from the perspectives of spatial distribution of waterlogging points, drainage capacity of pipe network and surface runoff generation and confluence. The results show that: (1) with the increase of rainfall recurrence period, the peak of total water accumulating volume, the average decline rate of water accumulating volume and the number of waterlogging nodes increase; (2) optimizing the pipe diameter can shorten the average overload time of the pipe network from the entire pipe network, but for a single pipe, optimizing the pipe diameter may lead to overloading of unoptimized downstream pipeline; (3) the lower the imperviousness, the less the number of waterlogging nodes and average time of water accumulating, and (4) the west, northwest and southwest areas are relatively affected by the imperviousness, only improving the underlying surface conditions has limited influence on waterlogging in the study area. This study can provide reference for urban waterlogging prevention and reduction and pipe network reconstruction.

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The datasets used or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

The authors acknowledge funding through the National Key Research and Development Program of China (Grant No. 2016YFC0401409), National Foreign Experts Program of China (Grant No. G2023041024L), National Natural Science Foundation of China Youth Project (Grant No. 51509201), Key Scientific Research Program of Shaanxi Provincial Education Department (Grant No. 21JT028). The data were obtained from http://tjj.xa.gov.cn/tjsj/tjsj/ndsj/1.html, http://tjj.shaanxi.gov.cn/tjsj/ndsj/tjgb/qs_444/ and http://tjj.xa.gov.cn/tjsj/tjgb/ gmjjhshfzgb/1.html. We sincerely appreciate the editor and two anonymous reviewers.

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All authors contributed to the study conception and design. Rengui Jiang, Simin Wang and Jiancang Xie were responsible for the overall design of the study. Simin Wang performed the experiments and drafted the manuscript. Data collection were performed by Mingxiang Yang and Yinping Wang. Simin Wang and Wen Li carried out the data processing. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Rengui Jiang.

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Wang, S., Jiang, R., Yang, M. et al. Urban rainstorm and waterlogging scenario simulation based on SWMM under changing environment. Environ Sci Pollut Res 30, 123351–123367 (2023). https://doi.org/10.1007/s11356-023-31027-0

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  • DOI: https://doi.org/10.1007/s11356-023-31027-0

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