Disadvantages and advantages of hydroelectric energy?

Question

disadvantages and advantages of hydroelectric energy? need help for homework

Answer 1

http://www.eco20-20.com/Hydro-ProdSol.ht...

http://www.eco20-20.com/Hydro-SustainIss...

Check these out, it is the section in hydropower

Answer 2

One more disadvantage is that you rely on rain to fill the reservoirs. A dry winter in  a county such as New Zealand where most power is hydro and you are looking at a possible power shortage. Often  you need back up power generation.

Advantages - cheap, clean - make it the best solution though,

Answer 3

Advantage: The power source does not deplete natural resources, It does not generate pollution like internal or external combustion power sources. During times when power is not being used, the flow can be blocked, and power from other sources like solar cells, and wind generators can be used to pump the water back up into the reservoir kind of like recharging a battery.

Disadvantage: The process of building hydro power plants requires the building of large dams, and those dams will flood out large areas of land. This can wipe out entire ecosystems, and in the case of Hoover Dam, multiple ecosystems. This effect is not only seen where the flood occurs, but downstream of the flooded area because a shortage of water is generated. This can span multiple states, and possible multiple countries.

Answer 4

once it is in place the only cost is maintenance.

so the advantage is that it is very cheap to produce.

also when used by powering a water wheel it can be used without any stoppage on a year around stream or river.

The disadvantage is that in is not usually centrally located, and takes a lot of.power lines to take it to where it is needed.

The other disadvantage is that most dams are used for water control, so that the water is used for irrigation and not alway running through the dam.