f.
Nonlinear wave-wave interactions.
g. Wave breaking and runup.
i.
Wave-current interaction.
A time domain, finite-difference method is used to solve the Boussinesq
equations. The area of interest is discretized as a rectangular grid with the water-
surface elevation and horizontal velocities defined at the grid nodes in a stag-
gered manner. Time-histories of the velocities and fluxes corresponding to inci-
dent storm conditions are specified along external or internal wave generation
boundaries. The wave conditions may be periodic or nonperiodic, unidirectional
or multidirectional. Waves propagating out of the computational domain are
absorbed in damping layers placed around the perimeter of the numerical basin.
Porosity layers can be placed inside the computational domain to simulate the
reflection and transmission characteristics of structures such as breakwaters.
Purpose
This report describes BOUSS-2D, a comprehensive numerical model for
simulating the propagation and transformation of waves in coastal regions and
harbors based on a time-domain solution of Boussinesq-type equations. An
overview of the theoretical background behind the model is described in
Chapter 2. The numerical scheme used to solve the equations is described in
Chapter 3. The steps involved in setting up and running the model are described
in Chapter 4. A number of analytical, laboratory, and field test cases have also
been used to validate the model in Chapter 5. The different test cases were
selected in Chapter 5 to evaluate the ability of the model to deal with individual
wave transformation processes such as refraction, diffraction, wave breaking,
etc., as well as the combination of processes that occur in practical engineering
problems. Chapter 6 provides a summary and conclusions.
3
Chapter 1 Introduction
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