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Rising groundwater from sea level rise impacts coastal roads

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Seacoast roads under new threat from rising sea level

June 1, 2017 University of New Hampshire

Some roads, as far as two miles from the shore, are facing a new hazard that currently cannot be seen by drivers — rising groundwater caused by increasing ocean water levels….
….Groundwater levels are higher than sea levels and that drives the groundwater discharge to the ocean. But as sea levels begin to rise, this forces groundwater to slowly move up to maintain the equilibrium, inching closer to the pavement base layers that need to stay dry to defend their strength….

Jayne F. Knott, Mohamed Elshaer, Jo Sias Daniel, Jennifer M. Jacobs, Paul Kirshen. Assessing the Effects of Rising Groundwater from Sea Level Rise on the Service Life of Pavements in Coastal Road Infrastructure. Transportation Research Record: Journal of the Transportation Research Board, 2017; 2639: 1 DOI: 10.3141/2639-01

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