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Comparison of risk-based methods for bridge scour management

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

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Maria Pregnolato

Pier Francesco Giordano

P. J. Vardanega

Maria Pina Limongelli


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.

Journal Article Type Article
Acceptance Date Jan 27, 2023
Online Publication Date Mar 15, 2023
Publication Date Mar 15, 2023
Deposit Date Mar 16, 2023
Publicly Available Date Mar 16, 2023
Journal Sustainable and Resilient Infrastructure
Print ISSN 2378-9689
Electronic ISSN 2378-9697
Peer Reviewed Peer Reviewed
Volume 8
Issue 5
Pages 514-531
Keywords Bridge; Scour; Risk; Management; Transport resilience
Public URL
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