Abstract
Computation is made of wave setup and longshore currents induced by directional random waves on planar beaches with the bottom slope ranging from 1/100 to 1/10 for deepwater wave steepness of 0.005 to 0.080. The offshore wave incident angle is varied from O°to 70°. The random wave-breaking model employed for computation is the author's PEGBIS model (parabolic equation with gradational breaker index for spectral waves), which incorporates surface roller effects. Empirical formulas are fitted to the computed results of wave setup and longshore current velocities for convenience of coastal engineers. Calculation diagrams are also provided.
