Abstract

Multiple pipeline failures in water distribution systems (WDS) caused by natural hazards such as earthquakes can significantly reduce the functionality of the systems. After a natural disaster, a quick recovery of WDS is desirable to ensure that critical facilities have access to clean water. However, experience from recent disasters has shown that the recovery period for WDS can be long. The recovery period depends on various factors, such as available resources, budget, etc. As such, all the failed pipelines cannot be repaired at the same time. Hence, utilities need to prioritise damaged pipelines and perform the repair in such a way that the functionality of the WDS is optimised. Post-event system functionality gain may vary significantly depending on the choice of sequential recovery paths. Unlike other infrastructures, the functionality of WDS is not only dependent on topological integrity but also on hydraulic performance. In this study, a post-disaster recovery planning model for WDS is proposed. The restoration process is modelled in terms of topological efficiency, hydraulic resilience and hydraulic availability. The optimal recovery sequence is determined based on the recovery effectiveness estimated by the area under each recovery sequence curves. The proposed method is illustrated for a moderate size WDS.

摘要

由自然灾害（例如地震）引起的配水系统（WDS）中的多条管道故障会大大降低系统的功能。自然灾害后，需要快速恢复WDS以确保关键设施能够获得干净的水。但是，最近灾难的经验表明，WDS的恢复期可能很长。恢复期取决于各种因素，例如可用资源，预算等。因此，所有出现故障的管道无法同时修复。因此，公用事业需要对损坏的管道进行优先排序，并以优化WDS功能的方式进行维修。事件后系统的功能增益可能会有所不同，具体取决于顺序恢复路径的选择。与其他基础架构不同 WDS的功能不仅取决于拓扑完整性，还取决于水力性能。在这项研究中，提出了WDS的灾后恢复计划模型。根据拓扑效率，水力弹性和水力可用性对恢复过程进行建模。最佳恢复顺序是根据每个恢复顺序曲线下面积估算的恢复效果确定的。针对中等大小的WDS说明了所提出的方法。最佳恢复顺序是根据每个恢复顺序曲线下的面积估算的恢复效果确定的。针对中等大小的WDS说明了所提出的方法。最佳恢复顺序是根据每个恢复顺序曲线下的面积估算的恢复效果确定的。针对中等大小的WDS说明了所提出的方法。