3.3 Sometimes too much

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• Leerjaar 2

Today

Talk about Ukraine

WATER: Sometimes too much

• Recap 3.1 + 3.2
  
• Present your summaries
• Explanation 3.3
  
• Adjust your summary and work on topography
  

War in Europe

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)
  

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.

Learning objectives 3.3

• You know which areas have greater flood risks.

• You can explain why the flood risk of many areas is increasing.
  
• You can assess a number of measures to reduce flood risks.

What have you learned about this topic?
What was unclear while making your summary?

Listen to the explanation.

When the explanation is finished you will work on assignments.

Read paragraph 3.3.

Make 3.3: 2, 5 and 6 on page 72/73.

Continue with Support World 3.3 on page 77.

When the explanation is finished the teacher will check your understanding of the paragraph.

Moderate

Advanced

70% of all people live along rivers or at the coast.

Almost no water draws into the soil, so all the water flows into the river at the same time. Large amounts of water that flow into the river in one go is called a peak discharge.

Flooding

The number of floods will increase / decrease. The number of climate disasters has risen since 1970 to 20 / 200 per year. The UN climate agency expects the sea level to be 20 / 200 cm higher in 2050 than it is today.

Flooding

The number of floods will increase.

The number of climate disasters has risen since 1970 to 200 per year. The UN climate agency expects the sea level to be 20 cm higher in 2050 than it is today.

The majority of victims suffer from hypothermia.
People often die from the consequences of a flood such as hunger and sickness.

Measures against flooding

Short term and long term measurements:

• Reducing the enhanced greenhouse effect
• Stop deforestation and regeneration of forests
• Constructing dykes and dams
• Ensuring a safe drink water supply after a flood
• More space along the rivers (Ruimte voor de Rivier)
• Practising evacuation of citizens in case of flooding

Adjust your summary of 3.3 if needed.

Make 3.3: 1, 2, 6 and 7 on page 72/73.

Done? Start on your summary of 3.4.

Make 3.3: 2, 5 and 6 on page 72/73.

Done? Ask to check your work.

Continue with Support World 3.3 on page 77.

Done? Adjust your summary of 3.3 if needed and start on your summary of 3.4.

Moderate

Advanced