103 



Crest of a shallow water wave 

 X10-* gauge 1 



-0.4 -0.3 -0.2 -0.1 



0.1 0.2 0.3 0.4 



Figure 5.20: Free surface boundary condition errors for a shallow 

 water wave at order 4 



Crest of a shallow water wave 



9 



-0.4 -0.3 -0.2 -0.1 0.1 0.2 0.3 0.4 



-0.4 -0.3 -0.2 -0.1 



0.1 0.2 0.3 0.4 



Figure 5.21: Free surface and velocities at the center of the array 

 for a shallow water wave at order 4 



