Coastal structures are man-made constructions designed to protect coastlines from erosion, flooding, and storm damage. These structures include seawalls, breakwaters, and jetties, which help to manage wave energy and sediment movement along the shore. They play a crucial role in maintaining the integrity of coastal areas, especially in regions prone to severe weather. In addition to protection, coastal structures can also support recreational activities and enhance local economies. For example, marinas and piers provide access for boats and fishing, while beach nourishment projects can create more attractive shorelines for tourism. Overall, these structures are vital for both environmental and economic stability.