Study of waves

People who are looking for alternate sources of energy could use the information about the waves and how to predict them to show the projected output of a power plant that uses waves to run turbines. If this person knew that the waves would be strong enough to provide a good source of energy for the community he/she could use that information to try and push for the creation of the power plant. The wave information could be used to predict the estimated output of a power plant using the waves.

P.s there is a name for this sort of power plant but i dont know the ame of it :D