Clean Fresh Water A Limited Replenishable Resource Darlene Oehlke.
Post on 29-Mar-2015
219 Views
Preview:
Transcript
Clean Fresh Water A Limited Replenishable
Resource
Clean Fresh Water A Limited Replenishable
ResourceDarlene OehlkeDarlene Oehlke
From a distance, the Earth is a blue planet.
70% of the surface is covered with water.
From a distance, the Earth is a blue planet.
70% of the surface is covered with water.
97% of the Earth’s water is salt water
Less than 3% is fresh water
66% of all fresh water is trapped in glaciers, icebergs,
snow
Less than 1% of the fresh water is available for human
use
97% of the Earth’s water is salt water
Less than 3% is fresh water
66% of all fresh water is trapped in glaciers, icebergs,
snow
Less than 1% of the fresh water is available for human
use
97% of the water on the planet is salt water.
97% of the water on the planet is salt water.
Water ActivityWater Activity Using the
glassware given and 1000 mLs of water, make a short demonstration to model the stocks of water on Earth.
Using the glassware given and 1000 mLs of water, make a short demonstration to model the stocks of water on Earth.
Where is the water?Where is the water?
The sun drives the water cycle
The sun drives the water cycle
The sun evaporates water from the ocean, the water condenses, winds bring the clouds over land…
The sun evaporates water from the ocean, the water condenses, winds bring the clouds over land…
Water cycle review activity
Water cycle review activity
Complete the diagram of the water cycle showing the following stocks: ocean, surface water, ground water (including aquifers), ice and snow.
Label the flows: precipitation, infiltration, runoff, evaporation, condensation, discharge, melting, freezing
Complete the diagram of the water cycle showing the following stocks: ocean, surface water, ground water (including aquifers), ice and snow.
Label the flows: precipitation, infiltration, runoff, evaporation, condensation, discharge, melting, freezing
Three categories of water use:Three categories of water use:
Irrigation for agricultureIndustryDomestic use
Irrigation for agricultureIndustryDomestic use
Agricultural UseAgricultural Use70% of fresh water
use is for irrigation - Much is wasted
Standard irrigation (50% gets to roots and 50% is wasted)
70% of fresh water use is for irrigation - Much is wasted
Standard irrigation (50% gets to roots and 50% is wasted)
IrrigationIrrigation
Pollution from Agricultural runoff
Pollution from Agricultural runoff
Agricultural runoff
Agricultural runoff
Industrial water pollution
Industrial water pollution
Domestic use in MEDC’sDomestic use in MEDC’s
Water PollutionWater PollutionHuman waste: sewageHuman waste: sewage
Domestic UseDomestic Use
The average American uses 176 gallons of water per day compared to 5 gallons of water the average African family uses each day. (www.water.org)
The average American uses 176 gallons of water per day compared to 5 gallons of water the average African family uses each day. (www.water.org)
Two ways to solve a water crisis
Two ways to solve a water crisis
Increase supply of water
Decrease the demand of water
Increase supply of water
Decrease the demand of water
Ways to increase supplyWays to increase supply
Ways to increase the supply
Ways to increase the supply
Desalinate salt water, in cities near the ocean.
Transport water from areas that have a lot of water.
Purify waste waters and reused Harvest rain water Harvest fog (Northern Chile) Treat sewage and industrial waste
Desalinate salt water, in cities near the ocean.
Transport water from areas that have a lot of water.
Purify waste waters and reused Harvest rain water Harvest fog (Northern Chile) Treat sewage and industrial waste
Ways to decrease the demand of water
Ways to decrease the demand of water
Ways to decrease the demand of water
Ways to decrease the demand of water
Use efficient irrigation systems Charge more money for water Fix the plumbing in your house Teach people to use less water Fix leaking pipes in public water
systems
Use efficient irrigation systems Charge more money for water Fix the plumbing in your house Teach people to use less water Fix leaking pipes in public water
systems
top related