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Full-Text Articles in Other Oceanography and Atmospheric Sciences and Meteorology
The Impact Of Shoreline Stabilization On Sediment Supply And Ecogeomorphology: Assessing Marsh Response To Altered Wave Energies, Lake Borgne, Louisiana, Jessica J. Villers
The Impact Of Shoreline Stabilization On Sediment Supply And Ecogeomorphology: Assessing Marsh Response To Altered Wave Energies, Lake Borgne, Louisiana, Jessica J. Villers
LSU New Orleans Theses and Dissertations
Shoreline protection structures are a common response to lateral erosion in marshes, but limited studies exist on how they influence sediment supply and the resulting ecogeomorphology. This study investigates the impacts of marine mattresses, geotextile cages filled with riprap, in Lake Borgne, LA. A field study was conducted during cold front passages at a site with marine mattresses and a proximal control site without, collecting measurements of water depth, wave energy, lateral erosion, sediment accumulation, vegetation, and sediment characteristics. Wetlands with marine mattresses attenuated waves more than their natural marsh edge counterparts, which have limited conditions favorable for sedimentation. However, …
Wave Transformation At A Saltmarsh Edge And Resulting Marsh Edge Erosion: Observations And Modeling, Kevin J. Trosclair
Wave Transformation At A Saltmarsh Edge And Resulting Marsh Edge Erosion: Observations And Modeling, Kevin J. Trosclair
LSU New Orleans Theses and Dissertations
This study examines wind generated waves during winter storms, their transformation/attenuation near the marsh edge, and the resulting saltmarsh edge erosion. A simple numerical model for wave generation, transmission and marsh edge erosion was developed and validated against observations from Lake Borgne, Louisiana. Results suggest that meteorological conditions modify the local water depth via wind or wave setup and atmospheric pressure, thus exerting a first order control on the location of wave attack, which in turn determines the type of wave forces (shear vs. impact) that dominate the erosion process. Scarp failure follows, at a location determined by water level, …