In several ways artificial surf waves are produced, from surf pool wave (water or air accumulator (burst) systems), indoor wave (high velocity, shallow water flow).
Now there is a very interesting French development of a wave lake in the Pyrenees.
They call it wave garden.
(how it works --> below)
The: wavegarden website.
A youtube : movie of the wave garden.
How it works : patents online
Very clever how it works. Pulling this wedge shape (see below) along the bottom is probably a much more energy efficient than the pump/water burst wave pools others have developed.
Particularly as the wave is re-energized continously through the wedge. The "burst" systems loose energy from the start, resulting in a low energy, depleting wave.
If they further develop the system, where this wave wedge loops around like one of those ski/wakeboard cable parks and add several wedges they will have a super surfpark.
Waves when and where you want.
Also increasing speed and size of the wedge will increase the waveheight. Interesting concept!!
Interestingly there is already a competitor of the wavegarden with a multi wave concept system. At surfpark central.