SPECTRAL MODELLING OF COASTAL WAVES USING QUADWAVE1D

QuadWave1D is a fully dispersive and weakly nonlinear model for coastal wave prediction in one dimension. This model is based on the quadratic modelling approach (often referred to as frequency-domain models, weakly nonlinear mild-slope models, amplitude models, etc.), allowing efficient wave predication over large spatial domains. The efficiency of this approach stems from a significant modelling reduction of the original governing equations (e.g., Euler equations). Most significantly, the description of wave nonlinearity essentially collapses into a single mode coupling term determined by the quadratic interaction coefficients (QIC). As a result, it is expected that the efficiency achieved is accompanied by a decrease in model accuracy. This unfavorable consequence has motivated the development of QuadWave1D, with the aim of minimizing the error associated with the modelling reduction introduced by the quadratic approach.