as long as it rains, and water is stored at a higher elevation than the turbine or impeller shaft of a machine. The power is stored as potential energy and is converted to kinetic energy by the power generating station. This station may convert this potential energy into electricity, in the case of a electrical generator, or the power can be used to directly power a shaft that will run machinery.
power that is generatedby using river water
No, it is renewable, as long as the rain keeps filling up the dams.
hydro electric power has been believed to have said that it lasts for around 50-70 years
Long enough to power electricity
yes, hydro-power is considered a renewable energy source because it is easily gained and easily "re-made". Other Examples of this is biomass, geothermal energy and windpower. non-renewable energy is considered anything that takes a LONG time to make, like millions and billions of years! an example is oil, coal or natural gas.
50 to 70 years
As long as there is rainfall, yes.
50 to 70 years
Hydro-power is the cleanest source of energy. It is powered by the force of flowing water which turns the generator to generate electricity. Considering the amount of CO2 released in the atmosphere and its consequential global warming effects, Hydro Power is considered safest, cleanliest and most favour form of generating power. Even the UNFCCC provides highest credit for Hydel Projects.
So long as you have a reliable source of water and you are not having a bad impact on the environment diverting and using this water it is a very environmentally friendly way of producing energy.
As long as the water flows, energy can be generated. It would be renewable.
In short: The water is naturally recycled by the earth. Long answer: The water that goes through the hydro-power dam, goes through turbines, in which the water transfers its potential energy to kinetic energy to power the electrical generator. The same water that goes in the hydro-powered dam comes out just with less energy. The water eventually reaches the sea, where it slowly gets evaporated by the sun. This evaporated water slowly forms clouds, which will turn to rain clouds. The rain falls on the ground, and gets slowly funneled into streams, and rivers. Since rivers are typically above sea level, the water has a large amount of potential energy. These rivers then feed back into the hydro-electric dam completing the loop where they again convert there potential energy to electrical energy.