EVALUATION OF EBB SHOAL DREDGING ALTERNATIVES AT FORT GEORGE INLET, FL

摘要

The construction and maintenance of the St. Johns River (SJR) inlet north jetty and navigation channel has resulted in accumulation of littoral sediments causing migration of the Fort George River (FGR) inlet and the prevention of bypassing material to southern beaches. Three FGR inlet ebb shoal dredging scenarios were evaluated with the Coastal Modeling System (CMS) to determine if erosion to an adjacent shoreline could be halted or reversed while restoring FGR inlet efficiency and providing a sediment source for erosional beaches south of the SJR. The CMS model results for each dredging scenario were compared to the baseline condition with respect to changes to current velocity, tidal prism, sediment transport, morphology change, and wave energy density.