Comparison of risk-based methods for bridge scour management

M. Pregnolato*, Pier Francesco Giordano, L. J. Prendergast, P. J. Vardanega, Maria Pina Limongelli

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)


Scour is a significant cause of bridge failure, and resulting bridge closures are likely to generate significant disruption to infrastructure networks. The management of scour-susceptible bridges is a significant challenge for improving transport resilience, but tends to be heuristic and qualitative. Such assessments often suffer from insufficient knowledge of key factors and require assumptions, which may increase their estimation and relative uncertainty. Analysis of publicly available technical documents reveals that various definitions of “risk” are adopted, as well as multiple approaches are applied. This paper has three objectives: (i) to illustrate the concept of risk in bridge scour management; (ii) to propose a simple scoring system to analyse existing risk-based approaches to manage bridge scour; and (iii) to analyse and compare such approaches on the basis of the obtained scores. A sample of nine documents containing bridge scour risk assessment practices or approaches was analysed using the developed rating system.

Original languageEnglish
Pages (from-to)514-531
Number of pages18
JournalSustainable and Resilient Infrastructure
Issue number5
Publication statusPublished - 2023
Externally publishedYes


  • Bridge
  • Management
  • Risk
  • Scour
  • Transport resilience


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