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An innovative approach to assess the impact of urban flooding: Modeling transportation system failure due to urban flooding

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dc.contributor.author Abenayake, Chethika
dc.contributor.author Jayasinghe, Amila
dc.contributor.author Kalpana, Hasintha Nawod
dc.contributor.author Wijegunarathna, Eshi Eranga
dc.contributor.author Mahanama, P.K.S.
dc.date.accessioned 2023-11-21T04:19:54Z
dc.date.available 2023-11-21T04:19:54Z
dc.date.issued 2022
dc.identifier.citation Abenayake, C., Jayasinghe, A., Kalpana, H. N., Wijegunarathna, E. E., & Mahanama, P. K. S. (2022). An innovative approach to assess the impact of urban flooding: Modeling transportation system failure due to urban flooding. Applied Geography, 147, 102772. https://doi.org/10.1016/j.apgeog.2022.102772 en_US
dc.identifier.issn 0143-6228 en_US
dc.identifier.uri http://dl.lib.uom.lk/handle/123/21671
dc.description.abstract The transportation system is often considered a critical infrastructure as the failure of its components can have a substantial impact on the economy and social well-being of a country. Extreme weather events such as urban flooding disrupt transportation networks with delays, diversions, and partial or full closure of roads and, thereby, influence human movement patterns. Most studies in the field of transportation network failure due to urban flooding are focused only on micro-scale, in-situ approaches rather than referring to the holistic impact on the entire transportation system. Moreover, such approaches are failed to address the changes in travel behaviour concerning their trip purpose, mode choice, and income which can be changed due to inundation. Hence, this study presents a novel approach to assess the entire transportation system failure due to urban flooding. Consequently, the impact of urban flooding on human movement patterns was assessed. The proposed framework is developed based on the network centrality measures, namely, betweenness centrality and closeness centrality. The study is predominantly based on Open-Source GIS tools and the case study is carried out in Colombo, Sri Lanka which has the highest concentration of population and transportation network. The hotspots of the failure of the network were statistically and spatially illustrated. The study revealed three key findings; (a) the fragmented network due to inundated road segments triggers the spatial changes in the accessibility, particularly decreasing the accessibility in most of the core areas whereas increasing the accessibility in some peripheral areas which are not significant under the baseline condition (2) the functional changes of the entire transport network occurs due to flooding events (3) the considerable changes in the trip length occurs due to the disruption of transport network links and the impact is mostly notable in long-distance trips compared to short distance trips. The proposed framework can be utilized as a planning tool for both disaster practitioners and infrastructure operators in identifying the flood risk; and prioritizing flood mitigation investments, thereby, making the transportation system more robust to extreme flooding. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.subject Critical infrastructure en_US
dc.subject Network analysis en_US
dc.subject Transportation resilience en_US
dc.subject Transport planning en_US
dc.subject Urban planning en_US
dc.subject Urban simulation en_US
dc.subject GIS en_US
dc.title An innovative approach to assess the impact of urban flooding: Modeling transportation system failure due to urban flooding en_US
dc.type Article-Full-text en_US
dc.identifier.year 2022 en_US
dc.identifier.journal Applied Geography en_US
dc.identifier.volume 147 en_US
dc.identifier.database ScienceDirect en_US
dc.identifier.pgnos 102772 (1-14) en_US
dc.identifier.doi https://doi.org/10.1016/j.apgeog.2022.102772 en_US


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