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Approximately 13 million dollars
Hydroelectric power plants or H.E.P stations use a flowing river to turn a turbine which powers the genertator much like other power sources to create electricity. The water is then returned to the river. H.E.P stations can also be in a reservoir.
about 20%.
As much as yor mom can take
Hydroelectric power plants are in both North and South Korea. Hydroelectricity contributes much to both North and South Korea's electric needs.
One advantage to most hydroelectric plants, is the fact it normally produces much cleaner energy than say a coal power plant.
armenia
About 6.1%.
Hydroelectric power plants don't exhaust pollutants into the air, and they output power at a relatively reliable rate (compared to solar or wind, especially). On the other hand, they drastically affect all ecosystems upstream of the dam, and are much more environmentally destructive than nuclear power plants.
In general, hydroelectric power generation is much cheaper than plants using fossil fuels. In the second attached link, it is stated that the average operating cost for a hydroelectric plant is around six cents per kilowatt while an fossil fuel power plants operating cost average is above 2 cents per kilowatt.
It may cos around 100 MWh
Armenia