Seawalls
The purpose of a seawall is to protect areas of human habitation, conservation and leisure activities from the action of tides and waves. As 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.
The shoreline is part of the coastal interface which is exposed to a wide range of erosional processes arising from various sources, meaning that a combination of erosion and natural processes will work against a seawall.Given the natural forces to which seawalls are constantly subjected to, maintenance is an ongoing requirement if they are to provide an effective long term solution.
The many types of seawall in use today depending on both the varying physical forces they are designed to withstand, and location specific aspects, e.g :local climate, coastal position, wave regime, and value of landform.
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