MODELS FOR BARRIER-ISLAND RESTORATION

A review is presented of available first level response models for the design of barrier island restoration, including cross-shore and longs hore response components. The cross-shore models account for relative sea level rise and beach nourishment; however, the effects of profile lowering beyond the limits of profile equilibration and the associated increase in wave climate are not included. The effects of induced lon gshore transport on a barrier island of short to moderate length limit the longevity of a nourishment project due to the adjacent inlets act ing as sinks and tending to ''drain'' sand off, thereby maintaining th e project effective length as that of the barrier island. In such case s, the longevity can be increased by the use of terminal structures al though this requires greater knowledge and consideration of wave direc tion.