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{{ReportDoc| repdate=September 2009| reptype=Final report| datecovered=| title=Barrier Island Migration Over a Consolidating Substrate| subtitle=| authors=Julie Dean Rosati| repnumber=ERDC/CHL TR-09-8| sponsor=

U.S. Army Engineer Research and Development Center
Coastal and Hydraulics Laboratory
3909 Halls Ferry Road
Vicksburg, MS 39180-6199

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sponsoracro=| sponsornumber=| abstract= Barrier islands that overlie a compressible substrate load and consolidate the underlying subsurface. Through time, the elevation and aerial extent of these islands are reduced, making them more susceptible to inundation and overwash. Sand washed over the island and onto back-barrier marsh or into the bay or estuary begins the consolidation process on a previously non-loaded substrate, with time-dependent consolidation a function of the magnitude of the load, duration of load, and characteristics of the substrate. The result is an increase in the overwash, migration, breaching, and segmentation of these islands. This research determined the degree to which consolidation affects the evolution of barrier island systems overlying a poorly consolidated substrate, both for natural islands and those that have been restored with an infusion of sand from an external source. A