Water Usage and Treatment

Where does the water that we use come from?

• Fresh water – lakes, rivers, streams, ground water

• Most water on the planet is salt water.

• The saline content makes it poisonous to plants and animals.

Where does the water that we drink come from?

• Lakes• Rivers• Underground

aquifers - area underground rock through which water can move.

Coagulation

• Chemicals are added to water to remove dirt.• Dirt drops

to the bottom

Sedimentation

• Large particles drop to the bottom

Filtration• Water

moves through filters like sand, gravel and charcoal to remove small particles

Disinfection• A small amount of Chlorine

is added to the water to kill microorganisms.

Storage

• Water is put in a closed tank or reservoir and runs through pipes to communities

How do we use water?

•Drinking•Bathing• Irrigation• Industry

Is water renewable or non renewable?

• Water is a renewable resource (water cycle), but some areas have such a high need that water shortages can occur.

Potable Water

• Potable water is water that is safe for human consumption.

• In some parts of the world, people do not have water delivered to their home threw pipes. They must travel to get potable water.

• Water supplies can become contaminated due to poor sanitation.

• This can lead to life threatening diseases such as cholera.

Desert Biome Map

• Why is it a good idea to conserve water?• What are some things that you can do to

conserve water?• What are some things that your family can do

to conserve water?• What are some things that our community can

do to conserve water?

The water crisis

• http://thewaterproject.org/water_stats#stats

• Create a poster to inform students about the importance of water conservation.