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Effect of disaster debris, floodwater pooling duration, and bridge damage on immediate post-tsunami connectivity
International Journal of Disaster Risk Reduction ( IF 2.896 ) Pub Date : 2021-02-10 , DOI: 10.1016/j.ijdrr.2021.102119
Sabarethinam Kameshwar; Hyoungsu Park; Daniel T. Cox; Andre R. Barbosa

This study establishes a general methodology to account for the effects of the amount of disaster debris generated, debris dispersal, the duration floodwater pooling for events like tsunamis, and damage to infrastructure on initial and time evolution of connectivity between critical facilities and key locations within a community such as evacuation zones and shelters. The proposed methodology is applied to Seaside, OR, for cascading seismic and tsunami hazards corresponding to seven return periods ranging from 250 to 10,000 years. The post-event connectivity is assessed for the first 72 h. The results provide insights on immediate post-event connectivity, its evolution with time as floodwaters recede and as the debris is cleared, and the relative effect of debris, floodwater pooling, and infrastructure damage on connectivity. For example, the level of disconnection caused by debris and flooding in Seaside is not always directly proportional to the return period (magnitude) of the seismic-tsunami event. Results show that bridge damage further exacerbates the lack of connectivity due to debris and floodwater pooling, highlighting that multi-hazard and multi-infrastructure analyses are necessary to understand connectivity for disasters.



中文翻译:

灾害残骸,洪水蓄水持续时间和桥梁损坏对海啸后立即连通的影响

这项研究建立了一种通用的方法来解释灾难性碎片产生,碎片散布,海啸等事件的持续洪水蓄水池的持续时间以及关键设施与关键区域之间关键位置之间的连通性的初始和时间演变对基础设施的破坏的影响。疏散区和避难所等社区。拟议的方法适用于俄勒冈州海边,用于级联地震和海啸危害,对应于七个回归期,范围从250到10,000年。事件后的连通性在前72小时进行评估。结果提供了有关事后即时连通性,随洪水消退和清除杂物而随时间演变的信息,以及碎片,洪水汇聚和基础设施损坏对连通性的相对影响。例如,海边的碎屑和洪水造成的断层程度并不总是与地震海啸事件的返回周期(幅度)成正比。结果表明,桥梁损坏进一步加剧了由于碎片和洪水汇聚而导致的连通性不足,这突出表明,对灾害进行连通性分析需要进行多危害和多基础设施分析。

更新日期:2021-02-22
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