3.6 The rivers are knocking on the back door

• Aardrijkskunde
• Middelbare school
• vmbo t, mavo, havo, vwo
• Leerjaar 2

3.6 The rivers are knocking on the back door

Part 1

Learning goals

- You know that many rivers in the Netherlands have been dyked by humans and you know the consequences of this.

- You understand why we need to give rivers more space and why prevention of larger peak discharges is better than disaster management.

- You can recognise measures in the landscape and on maps to keep the water balance in balance.

A long tradition of building dikes

They have been building dikes in the lower reaches for centuries.

Urban development does not help: the river becomes narrower and is enclosed.

Higher dikes are not enough.

What happened in:

1953 

and

1995

Watersnoodramp 1953 (sea)

consequences of the flood disaster

Watersnoodramp 1995 (river)

The Maas through Maastricht

Flooding of the Maas in 1995, reason for the Room for the River plan

Make ex  2

Area outside the dyke

Area along the river or sea that is not protected by the dykes.

Area inside the dyke

Area along the sea or river that is protected by the dykes.

Cross section river

Uiterwaard = Het gebied tussen de winterdijk en de rivierbedding.

3.6 The rivers are knocking at the back door

Part 2

Leerdoelen

- You know that many rivers in the Netherlands have been dyked by humans and you know the consequences of this.

- You understand why we need to give rivers more space and why prevention of larger peak discharges is better than disaster management.

- You can recognise measures in the landscape and on maps to keep the water balance in balance.

More room for the river

Which measures do you already know?

Room for the River

Measures in the river region

Three-stage approach

Three ways in which the government wants to prevent flooding.

1. Hold the water

Widening the river bed and lowering floodplains.

2. Store the water

Store water temporarily in retention areas.

Area where water is temporarily stored to relieve the river.

3. Discharge the water

Remove obstacles from the floodplains so that the water can flow more quickly to the sea.

discharge

hold

store

Multiple use of space

Preventive measures are better than disaster relief.

What does this mean?

Make ex 3, 5 and 6