The article discusses the use of anthropogenic structures like breakwaters, headlands, and reefs to manage coastal erosion and sediment accretion. Breakwaters, made of materials such as rock or concrete, are designed to reduce wave energy and promote sediment accumulation, helping to stabilize wetlands and create intertidal marsh habitats. However, they can disrupt longshore sediment transport, leading to erosion downdrift and may create unsuitable marsh areas by replacing natural sandy beaches. Coastal parks, like Colonial National Historic Park, employ these structures to protect historic sites from wave damage.
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