Trends in water consumption

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  • Trends in water consumption
    • Water availability?
      • Less than 3% of the world's water is fresh.
        • The rest is undrinkable in form of sea water.
      • 2.5% is locked up in ice
      • Leaving only 0.5% of total water attainable for drinking.
        • 100,000 km2  The largest percentage id found in aquifers.
          • Since 1950, there has been an rapid expansion of ground water for;
            • 50% of all drinking water.
            • 40% of all industrial water.
            • 20% of irrigated water.
      • is there enough water for all?
        • in theory there is no water shortage.
          • We only actually use 50% of the available water.
          • However...,All cause severe water shortages.
            • Rapid population growth in areas where water supplies are limited.
            • Detoration in water quality.
            • uneven distribution of water supplies.
            • Out of a global population of 6.6 billion.
              • 1.4 billion lack clean drinking water.
              • 2.4 billion lack adequate sanitation
              • 0.5 billion face water shortages.
              • Half of the world's lakes and rivers are badly polluted.
              • Food supplies are threatened as water shortages increase.
              • 12% of the population consumes 85% of it's water.
              • population growth by 2025, will demand a 20% of water supplies.
      • key words
        • water stress
          • when a countr's water consumption is 10% higher than it's renewable freshwater.
        • water scarcity
          • When the amount of 1000m o water availale per person per year.
    • Water distribution
      • Fewer than 10 countries possess 60% of the world's available water supply.
        • Brazil
        • Russia
        • China
        • Canada.
      • global coverage of of water distribution;
    • Consumption of water.
      • Durring the 20th centuary, global water consumption increased by 600% due to population growth and economic development.
      • Farming uses 70% of all water.
        • This figurerises to 90% in LEDC.
        • Increased global prosperity will demand even higher rates of food production.
          • with it wil increase the demand of water needed to produce this.
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      • Industrial and domestic consumption inc. complete with as agriculture.
      • Daily domestic use average 47 l / person in Africa.
        • 95l in Asia.
        • 334 l in UK.
        • 578 in the USA.
  • Global water suitation
    • Little or no water scarcity;
      • Europe
      • Australia
      • USA; centeral,mountan region.
      • Canada.
    • Approaching physical water scarcity.
      • California, USA.
      • Murray Darling basin, NSW>
      • Economic water scarity.
        • The Sahel.
    • Issues of water insecurity.
      • Asia and the pacific
        • 1/3 of the population lacks access to clean drinking water
        • water pollution from the level of bacterial waste from human source is 10 times greater than reconomend levels.
        • agriculture accounts for 90% of freshwater withdraws.
        • 10,00 (1950)
          • Untitled
          • aquifer depletion in Asia has led to a decrease in water avalblity.
          • Untitled
          • 2400 in (1990)
      • Africa.
        • 25 African countries will face water stress by 2025.
          • over 300 million people lack acess to safe water.
            • 51% of people in sub Saharan Africa are without clearn and sfafe water suply
          • Inc. Water consumption with half of Europe's cities over exploiting their groundwater reserve.
  • Europe
    • A lack of access to clean drinking water in E. Europe and C. Asia.
    • Inc. Water consumption with half of Europe's cities over exploiting their groundwater reserve.
    • A decline in water quality in countries grom groundwater pollutin, from nitrates in pesticides-The aral sea
  • North America
    • Aquifer depletion is steadily increase due to population growth and expansion of industry and irrigation.
    • Water pollution from agriculture run off  has contaminated many ground and surface waters,

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