Bay erosion is related to fetch (width of open water). Larger bays have larger wind-driven waves due to predominantly south and southeast winds. Consequently, erosion is focused on the north and northwest bay shores. West Bay has the largest fetch and the shoreline retreated by 1000 ft. The north and northwest shorelines of Bastrop and Christmas Bays retreated by up to 500 ft. Drum Bay, with the smallest open water fetch, suffered shoreline retreat of up to 300 ft.
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