WATER RESOURCESWATER RESOURCES

Little Water AvailableLittle Water Available

Most water is oceans/saltwater - ~97% ~3% freshwater

Only 0.024% usableLiquid, accessible groundwater, surface water

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

http://www.youtube.com/watch?v=HW5eBfZhE4M

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/Irrigation

Most wasted – evaporation, seeps before plants absorb

20% IndustryEnergy production, manufacturing, etc.

10% DomesticCities and residencesLargest domestic use – toilets

Web ResourcesWeb ResourcesWater used to make different products: http://environment.nationalgeographic.com/environment/freshwater/embedded-water/

Global Water Footprint: http://environment.nationalgeographic.com/environment/freshwater/global-water-footprint/

Water Use game: http://kids.nationalgeographic.com/kids/games/puzzlesquizzes/water-wiz/

Calculating Personal Water Footprint: http://environment.nationalgeographic.com/environment/freshwater/water-footprint-calculator/

Water Crisis News: http://news.nationalgeographic.com/news/archives/water-crisis/

Water conservation: http://video.nationalgeographic.com/video/environment/going-green-environment/green-home-makeover/conserve-water-greenguide/

Water Issues ArticlesWater Issues Articles1. Make an appointment with 4 different people

(3o’clock, 6, 9, 12)

2. Read your article

3. Summarize the main points/facts in your lab notebook

4. Meet, share your summary and write down theirs

WHAT MAIN WATER WHAT MAIN WATER ISSUES DO WE FACE?ISSUES DO WE FACE?

HOW IS WATER HOW IS WATER RECYCLED?RECYCLED?

WATER CYCLE

WATER CYCLE

WATER (Hydrologic) CYCLE

It is a “redistribution” of water. A drought somewhere = more water somewhere else

Transpiration

Can you name the processes?

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

Surface water and Surface water and groundwater are connectedgroundwater are connected

Most groundwater eventually flows into rivers, lakes, estuaries

Disruptions to groundwater, affects surface water

Overdraw groundwater dry out groundwater surface water drains into aquifer, drying out lakes, rivers, wetlands, etc.

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

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

Water stressorsWater stressors Freshwater withdrawal

Withdrawal increased 7x 2/3 of annual surface runoff in rivers and streams is lost by seasonal floods

Groundwater withdrawalOgallala aquifer

Increased waste

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

Freshwater in the Freshwater in the U.S.U.S.

We have plenty of freshwater, BUT not evenly distributed.

East – ample rain, West and Southwest – little

Rain ShadowRain Shadow

Fig. 13-6, p. 319