Figure 5.21: View northward on Wallops showing the southern end of the replenishment area. Prior to shoreline replenishment with offshore sands, NASA had previously utilized geotubes filled with sand to act as wave breaks to help slow erosion and minimize overwash especially in the vicinity of the UAV runway at the southern end of the island. During Hurricane Irene, these tubes took the brunt of the storm’s fury and some were completely destroyed. These were buried by the replenishment project, but intensive wave scour re-exhumed portions of the tubes. Subsequent to Hurricane Sandy, dune building processes have helped to partially rebury the tubes.
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