Tidal energy. Based on potential energy and kinetic energy of the system consists of the sun, earth and moon, the sources of energy used types not disappear.Is select a river or bay with the water tower and ground much range of tide is high and the dam the river or estuary. To create a reservoir. When the water will flow into the reservoir.The flow of water out of the tub to control flow through the turbine connected to generators. When the turbine rotation can use electric main electricity from tidal.