Using Water for Hydroelectric Power
(Hydroelectric Dam)
Explination/How it works
A dam is built across a river to raise water levels, to create the drop needed for the water to fall with force. The water goes in to a pipe called a Penstock and carries it to the turbine. The turbine spins from the waters force and powers the generator. The electricity from the generator is sent through transmission lines. The water then exits into the outflow river.
The main parts needed
For a Hydroelectric dam, the main parts/materials need are: Water, a turbine, a generator, transmission lines and a penstock.
+ and - Effects on Water
-If too much water is stored behind the reservoir, parts of the river downstream from the reservoir could dry out.
+Renewable energy source, water isn't taken.
+ and - Effects on the Environmnt
-Fish can be killed from Turbine blades
+Doesn't pollute
+ and - Effects on Humans
+Contributes to the storage of drinking water
+Clean and cheap for the people buying the electricity
-Costs money to build
Long Term Effects
Hydroelectric Dams DO wear down and break.
-9 Major dams failed since 1950.
-In mid 1900's 33 major dams failed resulting in 1680 fatalities.
Interesting Facts
Canada is in the number one spot for top Hydroelectric generating countries.
20% of electricity worldwide comes from hydroelectricity.
Where you can find out information
www.opg.com (Ontario Power Generation)