Hydro Power
Asia-Pacific Economic Cooperation (APEC)

European Commission - Eurostat
Potential and kinetic energy of water converted into electricity in hydroelectric plants and pumped storage facilities.

International Energy Agency (IEA)
Potential and kinetic energy of water converted into electricity in hydroelectric plants and pumped storage facilities.

Latin American Energy Organization (OLADE)
The energy potential of a water flow.

Production will be calculated as the sum of all energy obtained from turbinated flows at the plants, plus equivalent energy at the flows split at the weirs and gates.

Organisation of Petroleum Exporting Countries (OPEC)
Hydro shows the energy content of the electricity produced in hydro power plants. Hydro output excludes output from pumped storage plants.

United Nations Economic Commission for Europe (UNECE)
Potential and kinetic energy of water converted into electricity in hydroelectric plants and pumped storage facilities.

UNSD Energy Statistics Section
Energy derived from the potential and kinetic energy content of water.

World Energy Council (WEC)
Gross theoretical capability is the annual energy potentially available in the country if all natural flows were turbined down to sea level or to the water level of the border of the country (if the watercourse extends into another country) with 100% efficiency from the machinery and driving water-works. Unless otherwise stated in the notes, the figures have been estimated on the basis of atmospheric precipitation and water run-off.

Gross theoretical capability is often difficult to obtain strictly in accordance with the definition, especially where the data are obtained from sources outside the WEC. Considerable caution should therefore be exercised when using these data.

Where the gross theoretical capability has not been reported, it has been estimated on the basis of the technically exploitable capability, assuming a capacity factor of 0.40. Where the technically exploitable capability is not reported, the value for economically exploitable capability has been adopted, preceded by a ">" sign.

Technically exploitable capability is the amount of the gross theoretical capability that can be exploited within the limits of current technology.

Economically exploitable capability is the amount of the gross theoretical capability that can be exploited within the limits of current technology under present and expected local economic conditions. The figures may or may not exclude economic potential that would be unacceptable for social or environmental reasons.

Capacity in operation is the total of the rated capacities of the electric generating units that are installed at all sites which are generating, or are capable of generating, hydro-electricity.

Actual generation is the net output (excluding pumped-storage output) in the specified year.