Sand dunes provide protection against damaging coastal storms by absorbing wave energyand act as major sand storage areas which replenish sand to eroded beaches during storm events. Without sand dunes, storm waves rush inland and flood properties.
The dunes are unstable subject to the ravages of wind and water. Beachgrass helps to build and stabilize beacause the blades of grass help trap wind blown sand which can create new dunes and expland existing dunes. Beachgrass has thick brittle stalks that can be easily broken and killed by pedestrian or vehicular traffic.
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