what does a sea wall do
Seawall at Urangan, Queensland. A seawall (or sea wall) is a form of coastal defense constructed where the sea, and associated coastal processes, impact directly upon the landforms of the coast.The purpose of a seawall is to protect areas of human habitation, conservation and leisure activities from the action of tides and waves.s a seawall is a static feature it will conflict with the dynamic nature of the coast and impede the exchange of sediment between land and sea. The coast is generally a high-energy, dynamic environment with spatial variations occurring over a wide range of temporal scales.