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Case study: the performance and design outline of a buffering stormwater drainage system for a low-lying area

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Performance evaluation and safety assessment of a buffering stormwater drainage system (BSDS) for a low-lying area are discussed in this paper. Unlike a conventional pump drainage system, the BSDS, which drains stormwater runoff of a low-lying area to a nearby channel system through underground conduits with gravity, and then buffering peak flows with the storage capacity of a channel system, will discharge stormwater to rivers outside the low-lying area with pumps or flood gates if necessary. This kind of drainage system is considered to be environment friendly and economic both in terms of capital cost and operating & maintenance expenses. To investigate the design parameters and evaluate the performance and safety of BSDS, a hydraulic model coupling the conduit systems and a channel system was developed in this paper, and a case-study approach based on field investigation and simulation test was used. Moreover, the design requirements for safety of BSDS were drawn through a simulation test.
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Keywords: drainage; engineering design; flood management; flow monitoring; risk assessment; simulation modelling

Document Type: Research Article

Affiliations: State Key Lab of Pollution Control and Resource Reuse, Tongji University, Shanghai,China

Publication date: 01 September 2008

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