ABSTRACT

A technical solution is developed to control stormwater runoff from plots in order to mitigate pluvial flood risk. Climate change alters precipitation patterns, which increase a risk for urban drainage systems (UDS) operating above their design limits. Therefore, feasible solutions are needed to retrofit UDSs to new climate conditions. In this study, street storage units (SSU) are coupled with a predictive real-time control algorithm to temporarily accumulate stormwater and thus minimise the risk of UDS surcharge. SSUs are operated in distributive mode and do not directly affect the flow in the pipeline, which makes the system less vulnerable to failures. SSUs are fully usable for citizens in dry periods. The results showed that control of 6% key inflows with SSUs reduced the number of flood nodes by 30% during an extreme weather event. The solution was successfully tested in Rakvere town, Estonia.

摘要

开发了一种技术解决方案来控制地块的雨水径流，以减轻洪水风险。气候变化改变了降水模式，这增加了城市排水系统 (UDS) 在其设计极限之外运行的风险。因此，需要可行的解决方案来改造 UDS 以适应新的气候条件。在这项研究中，街道蓄水单元 (SSU) 与预测性实时控制算法相结合，以暂时积聚雨水，从而最大限度地降低 UDS 附加费的风险。SSU 以分布式模式运行，不会直接影响管道中的流量，这使得系统不易受到故障的影响。SSU 在干旱时期完全可供市民使用。结果表明，在极端天气事件期间，使用 SSU 控制 6% 的关键流入量将洪水节点的数量减少了 30%。