Towards Resilient Roads to Storm-Surge Flooding: Case Study of Bangladesh

Shohel Amin, Umma Tamima, Luis Amador

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Abstract

Operating roads are critical during emergency operations at a disaster area. Prolonged inundation of pavements accelerates rapid deterioration of pavements and increases maintenance cost. The upgrade of vulnerable pavements with a raised subgrade and gabion-walls is proposed as the mean to increase the resiliency of strategic roads vital during the emergency attention in the aftermath of a cyclone. Hence, optimal pavement management can be used to allocate upgrade and maintenance and rehabilitation (M&R) operations to reduce the damage and mitigate the geo-physical risk and community vulnerability before the disaster even occurs. A case study is presented for regional highways, arterial and collector roads of Barguna district in Bangladesh that is frequently affected by cyclones and storm surges. The geo-physical risk and vulnerability (GEOPHRIV) index of each road segments is estimated by integrating the geo-physical risk; community, structure and infrastructure vulnerabilities; and damage indices. Dynamic linear programming is applied to optimize M&R strategies and the conversion of strategic roads into resilient perpetual pavements. The same budget required to optimize roads condition is also used to guide the conversion of roads into perpetual pavements, therefore increasing the overall network resiliency. As expected, the results show that most of the annual budget is equally expended into the conversion or the resurfacing of pavements. The decision making approach herein proposed is very useful to roads agencies around the world, because it provides them with the ability to increase the resiliency of their strategic network ex-ante any flooding disaster.
Original languageEnglish
Pages (from-to)(in press)
Number of pages11
JournalInternational Journal of Pavement Engineering
Volume(in press)
Early online date15 Feb 2018
DOIs
Publication statusE-pub ahead of print - 15 Feb 2018

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Bibliographical note

This is an Accepted Manuscript of an article published by Taylor & Francis in International Journal of Pavement Engineering on 15 Feb 2018, available online: http://www.tandfonline.com/10.1080/10298436.2018.1436706

Keywords

  • Resiliency
  • pavements maintenance
  • geo-physical risk
  • vulnerability
  • storm surge
  • optimisation

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