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St. Petersburg Coastal and Marine Science Center

St. Petersburg Coastal and Marine Science Center > Barrier Island and Estuarine Wetland Physical Change Assessment > Research > Hurricane Sandy Depositional Record

Hurricane Sandy Response - Barrier Island and Estuarine Wetland Physical Change Assessment

Hurricane Sandy Depositional Record

In this phase of the project, surficial sediments and sediment cores will be collected and analyzed to characterize Hurricane Sandy sediment deposits along the barrier island as well as the barrier and mainland estuarine shorelines near Assateague Island. This data collection and analysis will also serve to ground truth the Hurricane Sandy wetland change analysis that will be completed as part of this project. Sediment texture and historical context of event deposition will permit more accurate understanding of site-sensitivity as well as add metrics to cross-barrier sediment transport.

The resulting sediment map along with additional analysis of these and past sediment core research will help provide historical context beyond Hurricane Sandy impacts regarding long-term back-barrier development.

peat auger core     Sediment sampling plan
Above left: A peat auger core collected from the back-barrier marsh of Assateague Island, MD. An inorganic-rich layer found at the top of the core is thought to be sediment delivered to the marsh via Hurricane Sandy. Visual contrast in sediment down-core reveal similar layers as that observed at the top of the core (i.e., Hurricane Sandy layer). Detailed grain size analysis, measurement of basic textural parameters (bulk density and organic matter), and chronology will help refine the origin of these event layers and how they contributed to marsh accretion. In addition, the dated layers provide evidence of potential overwash observed in historical remote sensing data. [larger version]

Above right: Sediment sampling plan to identify depositional processes and provide ground truth for change assessments. [larger version]

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Page Last Modified: December 05, 2016 @ 11:24 AM (JSG)