RESILIENCE EVALUATION OF URBAN RAINWATER DRAINAGE SYSTEM IN PLAIN RIVER NETWORK AREA

WANG Hongwu; YAN Ming; ZHAI Yuejiao; DAI Xiaohu

doi:10.13205/j.hjgc.202312007

Volume 41 Issue 12

Dec. 2023

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WANG Hongwu, YAN Ming, ZHAI Yuejiao, DAI Xiaohu. RESILIENCE EVALUATION OF URBAN RAINWATER DRAINAGE SYSTEM IN PLAIN RIVER NETWORK AREA[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(12): 61-69,255. doi: 10.13205/j.hjgc.202312007

Citation:

WANG Hongwu, YAN Ming, ZHAI Yuejiao, DAI Xiaohu. RESILIENCE EVALUATION OF URBAN RAINWATER DRAINAGE SYSTEM IN PLAIN RIVER NETWORK AREA[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(12): 61-69,255. doi: 10.13205/j.hjgc.202312007

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RESILIENCE EVALUATION OF URBAN RAINWATER DRAINAGE SYSTEM IN PLAIN RIVER NETWORK AREA

doi: 10.13205/j.hjgc.202312007

Key Laboratory of Urban Water Supply, Water Saving and Water Environment Governance in the Yangtze River Delta of Ministry of Water Resources, National Engineering Research Center for Urban Pollution Control, College of Environmental Science and Engineering, Tongji University, Shanghai 200082, China

Received Date: 2023-10-24
Available Online: 2024-03-08

Abstract

Abstract

With the rapid development of urbanization, the pressure of urban drainage and the occurrence of waterlogging is increasing, and enhancing the "resilience" of rainwater drainage systems is an urgent need of urban development. This study selected a certain area of a plain river network city in the Yangtze River Delta as the research object. Based on the calibrated SWMM model and the existing research result, a resilience evaluation model of the rainwater drainage system was established from two aspects: the amount of waterlogging, and the duration of the system. We ran the model under different rainfall scenarios to analyze the resilience of the rainwater drainage system in the study area. The results show that as the rainfall intensity increases, the system resilience gradually decreases,which means that there is a negatiue linear correlation between the system resilience value and the increase in rainfall intensity. Under the conditions of low recurrence period, the decrease in resilient value is relatively smaller with the increase of rainfall intensity. The larger the recurrence period, the faster the decrease rate of system resilient value. Under the same rainfall recurrence period, as the proportion of impermeable ground increases, the system resilience gradually decreases. In the case of high recurrence period and high proportion of impermeable ground, the system resilient value is relatively lower; under the condition of rainfall with a return period of 10 years, the proportion of impermeable ground in the region increases, and the system's resilient value decreases the fastest. Introducing the concept of resilience into urban rainwater drainage systems and establishing an evaluation system that reflects the resilience of the system in response to external environmental changes and disasters can help comprehensively understand the performance of rainwater drainage systems. It is of great significance for the transformation and optimization of rainwater drainage systems and helpful for urban risk management.
- cities in plain river network area,
- urban rainwater drainage system,
- resilience evaluation,
- rainfall intensity,
- impervious surface

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References(18)

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