This book includes papers presented at the ASCE Specialty Conference on Coastal Hydrodynamics Conference, at the University of Delaware, June 28-July 1, 1987. The papers review the state of the art in our understanding of the hydrodynamics of the nearshore zone, covering such areas as shallow water wave statistics, nearshore currents, wave motions, and wave-structure interactions. The authors, from many countries, are among the leaders in the field of coastal engineering and nearshore oceanography. A number of the papers report on field measurements of water waves, including both the short (or wind) waves and the long waves, which result in low frequency motions in the surf zone. Theoretical models of the resulting nearshore circulation are also presented.