Water Use Around the World by fjzhangweiqun

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									Water Use Around the World


      Waste not, want not.
First, who has the water?
  Second, how much is considered adequate?

• “Experts” suggest that the following amounts
  of water are adequate to maintain a healthy
  living standard (per person):
  – Drinking                    up to 1 Gpd
  – Basic sanitation            5 – 10 Gpd
  – Bathing and cooking         5 – 40 Gpd
• Overall figures for a minimum healthy living
  standard range from 10 to 50 Gpd depending
  on location (eg. more in hot climates)
Next, how is it used?
Changes in Water Use Over Time
Water Use Per Person Per Year
    (“Total” Consumption, including indirect uses.)
     Per Capita Water Consumption in
      Selected Countries (household)
•   Country        Average use (gal/day)   NORTH & CENTRAL AMERICA
                                           • Canada 209.4        Haiti 1.2
                                           • Jamaica 8.1         Mexico 39.2
AFRICA
                                           • United States 176.5
• Angola 5.8            Botswana 19.3
• Egypt 41.6            Kenya 12.6
• Uganda 4.7            Zaire 4.4          •   SOUTH AMERICA
• Mozambique 2.7                           •   Argentina 45.4     Brazil 39.3
                                           •   Chile 70.8
                                           •   Venezuela 119.3
EUROPE
• Albania 4.1         Estonia 76.12
• France 77.3         Germany 46.2         •   ASIA
• Switzerland 28.9                         •   Iraq 47.4          India 13.3
                                           •   Israel 47.4        Viet Nam 39
• United Kingdom 29.8
                                           •   Philippines 89.7
                                           •   Turkey 101.9
Another Way to Look at the Data
        Where does it all go? (MDC)
•   Washing clothes in washing machine    30 - 40 gallons per load
•   Flushing toilet                       2 - 5 gallons per flush
•   Washing dishes                        20 - 30 gallons
•   Cooking a meal                        1 – 2 gallons
•   Washing dishes in a filled sink       8 gallons
•   Running the garbage disposal          4 gallons per minute
•   Brushing teeth / washing hands        1 - 2 gallons
•   Shaving with water running            20 gallons
•   Taking shower, standard shower head   6.5 gallons per minute
•   Taking shower, low-flow shower head   2 gallons per minute
•   Taking a bath                         30 - 40 gallons
•   Washing car                           50 - 150 gallons
•   Watering the lawn                     300 gallons
            Water Use in a Typical LDC
When you have to carry all your
water in a jug, you naturally tend to
use much less than if you have a
running tap.
(These numbers are rough estimates for a
“typical” person in a rural area.)
Cooking                   < 1 Gpd
Washing / Bathing         1 – 2 Gpd
Cleaning                  1 – 2 Gpd
Toilet                    0 – 1 Gpd
Clothes                   0 – 1 Gpd*
(* Clothes washing is done at the source.)
      Concerns For Water Safety
• One-third or more of
  the world’s population
  does not have access to
  adequate supplies of
  CLEAN water.
• The urban poor are
  often the worst off in
  the cities of the
  developing world.
Finally, what can we do about all this?
• Conserve water any way you can.
  – Low-flow fixtures, fix leaks, shorter showers, etc.
• Improve efficiency of water uses at all levels.
  – Especially in agriculture (drip irrigation, etc.)
• Provide technology to poor countries.
  – Inexpensive well solutions
• Provide water treatment assistance.
  – Individual and city-wide options

								
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