3.2 Water in balance

• Aardrijkskunde
• Middelbare school
• vwo
• Leerjaar 2

Water

In balance

Lesson goals

• 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.

Which term belongs to the description below?
Water in the ground that dates from earlier times.

Which term belongs to the description below?
The amount of water entering and leaving an area.

Below you can see rows of words. In which row do all the terms or phrases belong together?

1. fossil water - renewable water - aquifer
2. infiltration - evaporation - useful precipitation
3. renewable water - sustainable water management - water supply remains at the same level
4. fossil water - aquifer - sustainable water management

The process of cloud formation.

Sustainable water management

Renewable water sources:

- Sources which do not run out of water (rivers).

Non-renewable water sources:

- Sources which will run out of water in the future (aquifers).

If you use only renewable water sources, you are working on a sustainable watermanagement.

Are we working on sustainable watermanagement in The Netherlands?

Working

Check your answers with the answer sheet in Magister

satisfied? Go to p 78 make 3.1 and 3.2

need extra practice? Go to p 76 make 3.1 and 3.2

Lesson goals

• 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 water balance

Water in balance

Water can come in into a country through:

1. Precipitation
2. Rivers and from other areas
3. From fossil water

Water is coming into the Netherlands through the first 2 ways. We do not have any fossil water.

Through precipitation

• Water falls from the sky onto our piece of planet. This is a way how we get water.
• A lot of that precipitation also evaporates.
• When you calculate how much water fell minus the evaporation, you get the useful precipitation.
• Parts of this useful precipitation will sink into the ground through infiltration.

Water from other areas

We get water from our rivers.

We also get water from the ground.

Fossil water

• Fossil water can also be used as a source of water.
• We do not have fossil water in the Netherlands.
• A reserve of fossil water is called: an aquifer.

Homework

Make all of the assignments from 3.2