WATER RESOURCESWATER RESOURCES

What do we use water What do we use water for?for?

AGRICULTURE

INDUSTRY

DOMESTIC

25 bathtubs full

37 gallons

2,400 bathtubs full

40 gallons per person per day

Who uses the most?Who uses the most?

70%

20%

10%

Agriculture

Domestic

Industry

Water UsageWater Usage 70% AGRICULTURE

Most wasted – evaporation, seeps before plants absorb

20% INDUSTRYEnergy production, manufacturing, etc.

10% DOMESTICCities and residencesLargest domestic use – toilets

Little Water AvailableLittle Water Available Most water is oceans/saltwater - ~97%

~3% freshwaterOnly 0.024% usable

Liquid, accessible groundwater, surface water

Rest is frozen in ice caps or glaciers, too deep to extract, or polluted

Fig. 13-6, p. 319

Fig. 13-5, p. 318

Substantial conflict potential

Highly likely conflict potential

Unmet rural water needs

Moderate conflict potential

Washington

Oregon

MontanaNorth Dakota

Idaho South Dakota

Wyoming

Nevada NebraskaUtah

ColoradoKansas

CaliforniaOklahoma

New Mexico

Texas

Arizona

HOW IS WATER HOW IS WATER RECYCLED?RECYCLED?

WATER CYCLE

Can you name the processes?

http://www.teachersdomain.org/resource/ess05.sci.ess.watcyc.watercycle/

Currently there are ~30 armed conflicts over water

http://www.youtube.com/watch?v=Ikb4WG8UJRw

Southwest: http://www.youtube.com/watch?v=vy4WmRBUmW0&feature=related

Blue Gold Movie: http://www.bluegold-worldwaterwars.com/press_kit/BlueGoldTrailer_720.mp4

Why is water an Why is water an issue?issue?

Population & water resources –don’t always matchCanada vs. China

0.5% world’s pop’n 20% pop’n20% world’s freshwater 7% freshwater

Precipitation – key distributor (droughts and floods)

Water Wars – who owns the water?“Whiskey is for drinking. Water is for fighting over. - Mark Twain

Water Issues Freewrite

Thinking about the issues we investigated…

Do you think the next world war might be fought over water? Why or why not?

What is a solution to help prevent these conflicts?

Water stressorsWater stressors Population & water resources –don’t always match

Canada vs. China0.5% world’s pop’n 20% pop’n20% world’s freshwater 7% freshwater

Increased surface water and groundwater withdrawal

Increased waste

Farmers and cities competing for waterless access to water, yet feeding 82M more people every year