Many coastal areas throughout the world are suffering from erosion, so numerous attempts are made, by constructing various forms of sea defences, to stabilize a retreating beach or reduce its rate of erosion. In recent years, artificial beach replenishment has become an established method in helping to restore a deteriorating beach. However, there has been a relative lack of information regarding the post-replenishment behaviour of many artificially renourished beaches. Results of a study of a replenished beach at Hayling Island suggest that the apparent depositional and erosional trends measured along a typical beach profile can be due to the longshore movement of a single, trapezium-shaped, mass of shingle, at a constant rate, rather than variations in the longshore transport rate.

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