Chapter 11 - Water

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Chapter 11 - Water

• Section 2 Notes

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Did you know????

• According to the World Health Organization, more
  than 1 billion people lack access to a clean,
  reliable source of fresh water.

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Three Major Uses for Water

• Residential
• Agricultural
• Industrial

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• See p. 277 Fig 5
• Which of the three major uses of water is used
  the most in almost all countries?
• In how many countries does industrial use out
  number residential use? Which countries?

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Residential Water Use

• The average person in the US uses 80 gallons of
  water per day.
• Half of this usage is for personal use the rest
  is for outside the home activities.

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• Looking at this graph. Come up with 3 ways to
  decrease the number of liters used by each person
  in the US.

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Water Treatment

• Potable
• Pathogens
• Bacteria, viruses, protozoa, and parasitic worms
  are common pathogens.
• Water Treatment Worksheet

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Industrial Use

• Accounts for 19 of the water used in the world.
• Used to manufacture goods, dispose of waste, and
  generate power
• Most water in industry is used to cool power
  plants (ie. powerton)
• http//maps.google.com

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Agricultural Water Use

• Accounts for 67 pf the water used in the world.
  
• It can take 300 L of water to produce one ear of
  corn.
• 80 of the water used in agriculture evaporates
  and never reaches the plant roots.

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• Irrigations

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Waste Management Projects

• Nearly 2000 years ago, Romans built aqueducts to
  dry areas.
• Examples are dams, and water diversion canals.
• Goals bringing water to a dry area, creating a
  reservoir for recreation or drinking water,
  generating electric power.

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Dams Reservoirs

• Dam
• Reservoir
• Advantages Disadvantages to Dams -

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Water Conservation

• In Agriculture most comes from evaporation,
  seepage, and runoff
• Drip irrigations
• In Industry recycling of cool water and
  wastewater
• Pay business to conserve water

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Water Conservation

• In Home although it is a same of use, any
  conservation of water will help
• Take shorter showers
• Low-flow toilet
• Do not let water run when brushing teeth
• Wash only full loads in dishwasher and washing
  machine
• Dont water lawn or at least sparingly or in the
  evening

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Solutions for the Future

• Transporting Water
• Advantages
• Disadvantages
• Desalination
• Advantages
• Disadvantages