Barrier islands make poor sites for real estate development because they can be overrun by storms. Barrier islands are exceptionally flat or lumpy coastal landforms and a type of dune system. areas of sand that form parallel to the mainland coast due to wave and tidal action.
Barrier islands are usually found in groups of several islands, ranging from a few to more than a dozen. They change with storms and other action, but they absorb energy, protect coastlines, and create areas of protected waters where wetlands can thrive. Barrier islands can stretch for more than a hundred kilometers.
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