Aggradation at Bridges
Publication: Journal of Hydraulic Engineering
Volume 127, Issue 2
Abstract
Aggradation at bridges causes the bridge waterway opening to be reduced, possibly resulting in upstream flooding and increased contraction scour. Aggradation results when the sediment load supplied to a reach of river from upstream exceeds its capacity to transport sediment. Solutions to aggradational problems at bridges are often complex and expensive. Solutions include increasing sediment transport through the bridge by modifying the channel, constructing an upstream sediment trap, redesigning the bridge, dredging, and treating the cause of the aggradation. At many bridges, aggradation problems can be severe. As an example, aggradation at a bridge in northern Pennsylvania is described. The benefits, disadvantages, and costs for various possible solutions to the example problem are compared and the most cost-effective solution is presented.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 127 • Issue 2 • February 2001
Pages: 154 - 157
History
Received: Sep 13, 1999
Published online: Feb 1, 2001
Published in print: Feb 2001
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