3.2 Water in balance

• Aardrijkskunde
• Middelbare school
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• Leerjaar 2

Today

WATER IN BALANCE

• Present your summaries (10 min.)
  
• Explanation 3.2 (10 min.)
• Documentary (15 min.)
  
• Adjust your summary and work on topography (20 min.)

Learning objectives 3.1 + 3.2

• You can explain how the short and long hydrological cycles work.
• You can tell in which forms water can be stored.
• You can explain why a lot of water is unsuitable or unreachable for humans.

• You know the meaning of all terms associated with the water balance and sustainable water management.
• You understand how a water balance is put together.
• You can explain the importance of sustainable water management.

The journey of water: Water cycle

Short cycle: Water stays in more or less the same location.

Long cycle: Water goes on a big journey.

Forms of water:

• Liquid (like rain)
  
• Solid (like ice)
  
• Gas (like water vapour)
  

Distribution of water

TERMS

Fresh water versus salt water.

Surface water versus groundwater.

#You can tell in which forms water can be stored.
#You can explain why a lot of water is unsuitable or unreachable for humans.

Water balance: What comes in and what goes out?

Useful precipitation

Precipitation - Evaporation

Fossil water?

Water that is stored deep in the subsurface in a aquifer.

Assignment 2b.

Under which two conditions can such an underground water
supply form? Note the correct answers.
A with an impervious layer in the subsurface with a porous
layer beneath it
B with sufficient precipitation
C with a porous layer in the substrate with a second porous
layer underneath
D with a porous layer in the substrate with an impermeable
layer beneath it
E with sufficient useful precipitation now or in the past.
F with an impermeable layer in the subsurface with a
second impervious layer beneath it

Renewable or not?

3c + 3d

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Get to work

Adjust your summary of 3.2 if needed.

Make Topography World: cities and waterways at the end of the workbook.

Skip Regions and mountain ranges.

Done? Start on your summary of 3.3.