Energy dissipation model for a parametric wave approach based on laboratory and field experiments

Abstract

This study was undertaken to develop a simple energy dissipation model for computing the root mean square wave height transformation. The parametric wave approach of Battjes and Janssen (1978) was used as a framework for developingthe energy dissipation model. In contrast to the common derivation, the fraction of breaking waves was not derived from the assumed probability density function of wave heights, but derived directly from the measured wave heights. The presentmodel was verified extensively for a variety of wave and beach conditions (including small-scale, large-scale, and field experiments), and compared with four existing dissipation models. The present model gives very good accuracy for a widerange of wave and beach conditions and gives better predictions than those of existing models.

Keywords

• irregular wave model
• energy dissipation
• parametric wave
• surf zone