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Abstract
Flexible scour apron mats are sometimes used where seawalls are ‘floating’ in the beach, where firm rock foundations are out of economic reach. This paper reviews the use of flexible scour aprons for the toe protection of seawalls and revetments, based on some 20 to 40 years exposure at sites in NSW, Australia and in Cubut, Argentina. It contains examples of simple and compound revetments, and discusses the problems of design variations driven by cost cutting, and the risks of post-design and post- construction policy changes that critically affect the original design concepts, especially where reliance had been placed on concurrent beach nourishment, and apron elevation had been raised to take the benefit of increased protection offered by the beach nourishment.References
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