Topographic change, Hatteras Village, NC, after Hurricane Irene, 2011

Topographic change (difference) for a portion of Hatteras Village, NC, after Hurricane Irene in 2011. In the difference image, landward of the eroded beach, there is a line of high erosion of the ocean-side of the dunes, presumably caused by waves during Irene. There is also some indication of overwash, with a more landward line of erosion followed by a line of deposition. Red colors indicate erosion. For example, oranges and reds on the seaward side of the islands indicate wide-spread shoreline retreat. Blue colors show areas of accretion, such as overwash deposits where waves and surge have moved sand landward. (The Atlantic Ocean is on the bottom right.)