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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