Coastal engineering is a branch of civil engineering focused on managing and protecting coastal areas. It involves designing structures like sea walls, jetties, and breakwaters to prevent erosion and flooding caused by waves and storms. Coastal engineers also study the impact of human activities and natural processes on shorelines to ensure sustainable development. Additionally, coastal engineering addresses issues such as beach nourishment, which involves adding sand to beaches to combat erosion. This field plays a crucial role in preserving coastal ecosystems and supporting communities that rely on coastal resources for their livelihoods and recreation.