Depth, bed slope and wave climate dependence of long term average sand transport across the lower shoreface

A generally applicable form of qx that is a function of both a depth-dependent horizontal bed transport forcing component and bed slope qx = qx(h,S) is developed and quantified in terms of long term average behavior for this site. Dependence of the forcing component on wave climate is shown from higher than average qx derived from the lobe response during a recent five year period with abnormally high waves. Our qx(h,S) quantifies the balance between generally shoreward wave boundary layer sand transport and the opposing effect of the seabed slope, as incorporated in the predictive methods.