tidal wave effect from sigraph

How can I emulate the tdal wave effect shown in the fluid sim at Sigraph? I have made a domain with real world size changes as well as a rectangular inflow with an x force that I changed up and down and still I cannot get the water to fall over itself creating the look of many waves with lots of force.
Any help would be great.
Thanks,
Don.

resolution, donweldon, resolution. You’ll need at least 450 to see the finer details such as breaking waves.