CSTORM-MS Storm Surge and Wave Modeling Comparison for Proposed Dyke Marsh Promontory Restoration
ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS VICKSBURG United States
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The U.S. Army Corps of Engineers, Baltimore District NAB, is currently engaged in the Dyke Marsh Project for the National Park Service. Dyke Marsh is located along the Potomac River south of Alexandria, VA. The U.S. Army Engineer Research and Development, Coastal and Hydraulics Laboratory, conducted a numerical modeling study to compute differences in hydrodynamic conditions water surface elevations, depth-averaged water velocities, and wave heights, periods, and directions between existing conditions and seven alternative with-project conditions for Dyke Marsh. Modeling results suggested that several of the alternative with-project condition designs were viable in terms of the NAB goals to provide protection to the marsh from damaging waves and currents. All the designs decreased wave heights in the shadow zones of the structures, and none significantly altered water levels. The shorter-length project designs provided reasonable levels of protection to the marsh while not significantly increasing water velocities on the opposite eastern shoreline of the Potomac River. Detailed model results from each of the alternative with-project condition designs are presented herein.
- Physical and Dynamic Oceanography