WATERSection A

Riverwood Fish KillRead the article and study the mapAnswer the questions about the fish kill

Facts/Questions

Why did the fish die?

Uses of Water

How is water used in eggs?

Facts2 eggs is equal to:

Taking 10 showersWashing 10 loads of clothes25 loads of dishesFlushing toilet 100 times

How could this be?

Water and household goodsWater required to produce foods and metalsBeef 20,859 L/kgAl 8,348 L/kgRice 4,163 L/kgRubber 2,511 L/kgSugar 1,025 L/kgFlour 617 L/kgSteel 286 L/kg

Foul Water LabPercent recovery = final/initial X 100

Water Supply and DemandCould we ever run out of water?

FactsEach day 4 trillion gallons of rain or snow

falls in the USOnly 10% of it is used by humansA typical family of four uses 390 gallons of

water per day (direct use)Less than 10% of people in the world have

access to clean waterYou must drink between 2 and 5 L of water

per day

Water UseDirect - The measurement of water that can

be directly measuredex.

Indirect – hidden uses of water that can not be directly measured

ex.We use approximately 1645 gallons of water

per day

Water Use Con’thttp://water.usgs.gov/watuse/

Geographic Distribution

Any interesting points?

Geographic DistributionPrevailing winds drive evaporated water from

the west to fall in the east. So the west needs much more water for irrigation than the east does.

Where does water come from?

City WaterComes from underground water pipesTravel downhill from a reservoir or water

towerGoes to the water tower from the treatment

plantGoes to the treatment plant from a reservoir,

lake, or river

Water LocationsSurface Water – water that is found on the

surface of the earthGround Water – water that is found below the

earth’s surfaceAquifer - Aquifers are structures that are

porous rocks that act like sponges, they can hold water for thousands of years

Water Locations

Rural WaterComes from a wellWater is pumped from an underground

aquifer to the well

Pure WaterIs it possible to have 100% pure water?

Pure WaterNeither source of water is pure, there are

dissolved minerals, gases and other impurities that contaminate the water

Water Use AnalysisHow could you reduce the total water use in your

household for 3 days?

Which water use would be eliminated? What would be the consequences?

Suggest ways to reduce the water needed for essential tasks

Which uses would allow you to recover most of the used water, even if it were not as clean as it was before?

Riverwood Water CrisisIn Riverwood there is a strict water ban, each

household is allowed 40 gallons of water for three days

List three water uses that you could do without?

List one water use that you could NOT do without?

For which tasks could you reduce your water use, and how?

Which situations would allow you to reuse water?

Quote“When the well is dry we learn the worth of

water” ~ Ben FranklinHow does this apply in today’s economy?