Evaluation of Stormwater Mitigation Performance with LID Infrastructures, In-Sewer Space, and Real-Time Control Strategies
Publication: Journal of Hydrologic Engineering
Volume 29, Issue 5
Abstract
Because low-impact development (LID) infrastructures are effective in capturing and utilizing urban stormwater runoff, real-time control (RTC) strategies can be viewed as soft infrastructures, offering an additional suite of opportunities to improve the stormwater drainage system performance. However, there is a paucity of analyses that disentangle the contributing sources of performance enhancement in these joint hard–soft stormwater infrastructures. This study evaluated the stormwater system performance with integrated LID infrastructures, in-sewer storage capacity, and RTC strategies. Our results showed that LID infrastructures play a major role in mitigating the flow peaks and high volumes, whereas adding RTC to the storage unit and in-sewer flow control mostly improves the performance under relatively small rainfall events, e.g., those with a 3-year return period. The critical contribution of RTC is realized by utilizing storage units as much as possible during the rainfall event. A downstream storage unit that is too close to the outfall may not be suitable for RTC application together with in-sewer capacity utilization. In the present case, the combination of a midstream storage unit and upstream control site at branch pipes worked better than those at other locations. The results suggest that the integration of LID and RTC on a simulation-system level can enhance the reduction of the peak runoff and total discharged volume only if the storage site and control locations are selected carefully.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors acknowledge the National Natural Science Foundation of China (Nos. 52309030 and U2240223), the Water Technology Demonstration Project of the Ministry of Water Resources of China (No. SF-202210), the Water Conservancy Science and Technology Project of Jiangsu Province (No. 2023025), the Science Foundation of Nanjing Hydraulic Research Institute for Young Scholars (No. Y522005), and the General Research Fund of Hong Kong RGC (No. 17202020) for funding this study.
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Information & Authors
Information
Published In
Journal of Hydrologic Engineering
Volume 29 • Issue 5 • October 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Oct 11, 2023
Accepted: Apr 26, 2024
Published online: Jul 24, 2024
Published in print: Oct 1, 2024
Discussion open until: Dec 24, 2024
ASCE Technical Topics:
- Business management
- Control systems
- Disaster risk management
- Engineering fundamentals
- Environmental engineering
- Infrastructure
- Lifeline systems
- Mitigation and remediation
- Practice and Profession
- Sewers
- Stormwater management
- Sustainable development
- Systems engineering
- Systems management
- Water and water resources
- Water management
- Water storage
- Water supply
- Water supply systems
- Water treatment
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