Water current can be effectively used to generate clean electricity. Generation of electricity from water currents can be accomplished in very large scales, by constructing dams or constructing tidal power plants and ocean surface wave power plants. It can also be done by individual homeowners (homesteaders) and small business owners, to generate and use small amounts of off-grid electricity. When setting up large scale hydroelectric power plants (or dams), the environmental impact of setting up the dam should also be considered as they can actually change the course of a river or create flood situations. The Grand Coulee Dam in the Washington state is an example of large-scale power generation units.

Hydroelectric systems can also be used to generate power from rivers and oceans without constructing dams and examples of such power supplies include the tidal power generator units and ocean wave power generator units. The smalles example would be a new design of a floating waterwheel. (more…)