Les 9 - §3.4 Omgaan met water

• Aardrijkskunde
• Middelbare school
• vwo
• Leerjaar 3

Planning

How to manage water:

• How to manage too little
• How to manage too much

Key words §3.4

Water stress (waterstress): What happens when the amount, or availability of water in an area is not enough to meet the needs of the people in an area.

Physical water shortage (fysiek watertekort): There is too little water in an area to meet the needs of the people without disrupting/damaging nature.

Economic water shortage (economisch watertekort): With an economic water scarcity, too little has been invested to get the available water to the people.

Water war (wateroorlog): A conflict over water.

Learning goals

• Je weet dat waterstress door fysieke en economische watertekorten kan ontstaan.
• Je begrijpt waarom toenemende waterstress tot een wateroorlog kan leiden.
• Je kunt een aantal maatregelen noemen om om te gaan met watertekort
• Je begrijpt de drie treden van de drietrapsstrategie, en hoe ze overstromingen voorkomen

Dealing with little water

Three options:

• Hold on to the water you have
• Make more water
• Use less water

Holding on to water

Chinese edition

Making more water

Chinese edition

How did the Chinese try to make more water?

1. By redirecting a river
2. By transporting ice from the South Pole
3. By making rain
4. By making their own rainforest

Sustainable water management

• Desalination plants (making fresh water from salt water)
• Making water from the air

Using less water

How can you hold on to water at home?

Sustainable water management

• Decrease runoff by building dams
• Prevent evaporation by using more efficient irrigation
• Genetically modified plants that use less water

How to manage too much water (the Dutch way)

Three step strategy

• Store (vasthouden)
• Save (bergen)
• Drain (afvoeren)

Store water

• Lowers peak discharge (piekafvoer)
• The peak happens later (more time to prepare)
• Also waters the plants

Save water

• This prevents water from being part of the peak discharge
• So it prevents floods
• Saves water for a dry period of time

Drain water

• Getting rid of the water quickly and efficiently
• Essential in preventing floods
• No extra benefits

How to manage too much water (the Dutch way)

Three step strategy

• Store (vasthouden)
• Save (bergen)
• Drain (afvoeren)

Building higher dykes

1. Store (vasthouden)
2. Save (bergen)
3. Drain (afvoeren)

Making strips of grass in between roads

1. Store (vasthouden)
2. Save (bergen)
3. Drain (afvoeren)

Building a dam

1. Store (vasthouden)
2. Save (bergen)
3. Drain (afvoeren)