What physical factors determine the supply of water?

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What physical factors determine the supply of
water?

• G4 Water Key Idea 2.1

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Rivers only 2 of surface freshwater
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The parts of the water cycle
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Global values of the water cycle
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Climate determines where rain falls Highs and
Lows
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Freshwater availability varies at different scales
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Continent population and fresh water
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Upland Wales temperature and rainfall
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Craig Goch Wales - a good reservoir site why?
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London SE England Temperature and Rainfall
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England and Wales matching supply and demand.
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Water Transfer proposal (controversial)
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Water Balance
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Botswana Rainfall Total, seasonality,
variability
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India climate, river discharge, aquifers
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Relief river basins
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Climate Change ultimately reduced river flows
in some areas
Global warming will melt most Andean glaciers in
the next 30 years, scientists say, threatening
the livelihood of millions of people who depend
on them for drinking water, farming and power
generation.
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Aquifers and groundwater in the UK
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Thames Basin - artesian
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(No Transcript)
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See pie chart c).
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Water supply is not always top quality. Human
impact.
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Human impact on supply. Lake Chad.
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Water scarcity physical and economic.