Floods from Hurricane Harvey will make bridges and buildings vulnerable to collapse
As recovery efforts continue in the days following Hurricane Harvey, Virginia Tech expert Madeleine Flint says “When flooding occurs the foundation of infrastructure becomes vulnerable to erosion, which can lead to its collapse.”
Flint coauthored one of the first detailed studies to investigate how severe floods need to be to cause bridges to collapse, published earlier this year in the Journal of Infrastructure Systems. The research team discovered that collapses in the past were linked to less extreme floods than would be required by current standards.
“Almost all structures are vulnerable to flooding, especially when the precipitation is so extreme. In the area affected by storm surge we would expect to see foundations weakened from erosion, especially around bridges.”
“The best way to prevent future infrastructure failure would be to go back to standards proposed by President Obama, which would require federal buildings to be raised to elevations that would help them to withstand future floods. President Trump rescinded the standards.”
“Policymakers need to begin asking engineers to design or retrofit infrastructure to a higher standard. Because government engineers are required to make good use of public funds they are hesitant to design to a higher than minimum level if it incurs additional cost. I think the public supports designing critical infrastructure to a higher standard. We need to tell our policymakers that we need infrastructure to withstand more volatile conditions.”
Flint is an assistant professor in the Charles E. Via, Jr. Department of Civil & Environmental Engineering Department at Virginia Tech. Her research is focused on infrastructure sustainability, climate change, and resilience. Read her full bio here.
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