![]() ![]() ![]() Active Overwash Zone An area that is frequently flooded by high water and ocean waves generated by storms. The sand in these dunes is protected by the vegetation and is not moving. The vegetated dunes form hummocky topography landward of the beach. Stabilized Dune Complex Mounds or ridges of wind-blown sand that are typically densely vegetated with salt-tolerant grasses. NATURAL FEATURES Active Dune Complexīarren to sparsely vegetated mounds or ridges of wind-blown sand that form hummocky topography landward of the beach. Each geomorphic layer is stored in standard shapefile format viewable in any GIS software. The barrier-island classification was referenced and mapped using September 2007 high-resolution orthorectified aerial photography from the National Agriculture Imagery Program (NAIP), October 2007 low-altitude color videos of the Mississippi barrier islands acquired from Great Divide Pictures under contract to the National Park Service (NPS), and June 2007 1-meter-pixel-resolution Experimental Advanced Airborne Research Lidar (EAARL) collected by National Aeronautics and Space Administration (NASA) and the USGS.
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