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Mitigation Measures for Eroding Muddy Shores

by Ashish J. Mehta, (M.ASCE),
Robert Kirby,



Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water

Abstract:

A criterion for the stability of muddy coasts is proposed, accounting for bottom resistance, hydrodynarnic forcing and sediment supply. Although qualitative, this criterion provides a useful basis for discussing various measures for mitigation of shoreline recession. All such measures attempt to increase bottom resistance to erosion, minimize hydrodynamic forcing or increase sediment supply. The most common solution involves shore-hardening. However, off Mobile Bay in Alabama, an underwater mud berm that absorbs incoming wave energy has been constructed using dredged material. This soft-sediment engineering approach appears to be suitable for coastal environments where wave conditions are not extreme. A similar approach to stabilize the shore using dredged material is presently in the formative stage.

Subject Headings: Mud | Dredged materials | Shores | Shoreline protection | Sediment | Ocean waves | Mitigation and remediation | Alabama | United States

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