§3.2: water in balance - part 2

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• Middelbare school
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• Leerjaar 3

§3.2: Water in balance

Today

• Recap previous lesson
• Starting exercise 
• Explanation §3.2
• Assignments workbook

An area can get water in three ways:

1. Precipitation 

2. Receiving water from other areas 

3. Through the supply of fossil water (aquifer)

Useful precipitation 

Fossil water (aquifer)

Water balance: Netherlands 

• Precipitation
  
• Groundwater and rivers 
• Fossil water 

• Evaporation
• Outflow into the sea
• Water for consumption

Today

• Recap previous lesson


• Starting exercise 
• Explanation §3.2
• Assignments workbook

Water footprint

Water footprint = the amount of water you use

Starting exercise 

Go to somtoday > open the website 

• Calculate your water footprint
• Write down how big (or small) your water footprint is
• Write down at least 4 things you can do to reduce your water footprint

Today

• Recap previous lesson


• Starting exercise 
• Explanation §3.2
• Assignments workbook

Learning goals

• You can explain the difference between renewable water resources and non-renewable water resources.
• You can explain the importance of sustainable water management.
• You know what a water footprint is and how to calculate it.

Vocabulary 

Resources	(hulp)br onnen
Sustainable	Duurzaam
Replenished	Aangevuld	To fill something (example: water) up again
Renewable water resources	Vernieuwbaar water	Water that is replenished at the same rate that it is being used
Non-renewable water resources	Niet vernieuwbaar water	Water that is not, or very slowly replenished which means that it is going to run out (an aquifer for example)
Sustainable water management	Duurzaam watergebruik	Water management in which renewable water sources are used
Water footprint	Water voetafdruk	The total volume of fresh water used to produce the goods and services you consume

Sustainable water management

• Fresh water is limited
  
• That is why you need to be careful with the amount of water you use 
• A distinction is made between:

- renewable water resources

- non-renewable water resources

Sustainable water management = when you only use renewable water resources 

Vernieuwbaar water: 

water dat in hetzelfde tempo aangevuld wordt als dat het wordt onttrokken (rivier, neerslag).

Niet-vernieuwbaar water: 

water dat niet/langzaam wordt aangevuld, waardoor het opraakt.

Renewable water resources:

Water replenished at the same rate as it is withdrawn

        - Rivers, precipitation

Non-renewable water resources:

Water that is not (or slowly) replenished, it will run out

       - Fossil water in aquifers

If a country only uses renewable water resources = sustainable water management

Non-renewable resources: 

it runs out

Renewable water resources:

it will not run out

waterkringloop = vernieuwbaar water

Hydrological cycle = renewable water resource

Water footprint

➡ All the fresh water used in your household, but also for agricultural and industrial products

 ➡ Dutch water footprint:

      - domestic (huishoudelijk) water

      - industrial water

      - agricultural water    +

      = water footprint

Water footprint

Is influenced by:

1. Prosperity (welvaart)
2. Eating habits
3. Climate
4. Agricultural methods 

Learning goals

• You can explain the difference between renewable water resources and non-renewable water resources.
• You can explain the importance of sustainable water management.
• You know what a water footprint is and how to calculate it.

Today

• Recap previous lesson


• Starting exercise 
• Explanation §3.2
• Assignments workbook

Assignments workbook

• Read §3.1 + §3.2
• Finish all the assignments of §3.1 + §3.2

Done?

• Have your assignments checked by the teacher