Introduction
[2] The longshore transport of sediment is the single most important agent of coastal change along most of the world coastlines. Littoral drift can reach hundreds of thousands of cubic meters of sand per year [Komar, 1998]. Convergences and divergences of transport, caused by jetties, headlands or inlets, can yield large accretion or erosion rates, requiring
expensive engineering mitigation. Even on a local scale, divergences of sediment transport over complex sandbars can yield local shoreline erosion and evolving bathymetric anomalies