INFLUENCE OF HIGH-ANGLE WAVE INSTABILITY ON LARGE SCALE SHORELINE PROJECTIONS UNDER MEAN SEA LEVEL RISE. LLOBREGAT DELTA CASE STUDY.

In the context of mean sea-level rise, knowing the processes driving long term coastline evolution is an important concern for coastal management. One of such long-term processes is high-angle wave instability (hereinafter HAWI) than can occur on sandy coasts with a wave climate dominated by high-angle waves (with respect to the shore-normal). According to Ashton et al. (2001) this process leads to an anti-diffusive behavior on shoreline features. The theoretical characteristics of HAWI have been extensively investigated during the last two decades (see, for example, Falqués et al., 2017, and references therein) but its experimental validation is still hardly achieved.