3.5 The sea is knocking at the front door

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

3.5 The sea is knocking at the front door

Part 1

Grab a tablet and go to It's Learning - Digital learning environment - Digital atlas.

Complete the assignments on pages 146 and 147

3.5 The sea is knocking at the front door

Part 2

Learning outcomes

- You know what types of polders there are and that there are misunderstandings about safety.

- You understand why the flood risk in the Lower Netherlands is increasing and how the coast is protected against it.

- You know about and understand climate adaptation measures.

Water myths

How do we protect our country?

• Dyke ring: in the Netherlands there is an area that is protected against external water by a primary flood defense (dykes) or by high ground.
• The Netherlands is divided into a large number of dike rings. If a dyke ring were to flood, the other dyke rings would remain dry.

Polders in all shapes and sizes

Polder = a piece of land surrounded by dikes in which the water level can be artificially regulated.

There are 4 types of polders in the Netherlands:

1. Sea polders

2. Peat polders

3. Reclaimed lake floors

4. IJselmeer polders

Polders in all shapes and sizes

Lower Netherlands has four types of polders:

IJsselmeer polder

        Seapolders                                 Peat polders                     Reclaimed lake floors

Go to ex 1

Together

Make the exercises online

3.5 The sea is knocking on the front door

Part 3

Threats on the coast

Why does sea level continue to rise?

1. Global warming

2. Storm surges

-> foredune is knocked away.

important coastal defense. The row of dunes that are directly adjacent to a coast (Sea defense dune), often with marram grass.

How do we deal with these threats?

1. Suffering from coastal erosion, so dunes must be reinforced: sand replenishment.

2. Dynamic coastal management: nature takes its course.

3. A dynamic system due to ebb and flood: when the sea level rises, extra sediment is supplied.

What can you do about it?

Climate change cannot be stopped. But we can:

Climate adaptation (room for the rivers, more water storage capacity in cities, better drainage of water, more water retention to bridge dry periods)

droogmakerij

veenpolder

zeepolder

Een dijkring is

1. een aantal dijken die samen een cirkel vormen
2. een beheerder van dijken in dienst van het waterschap
3. een gebied dat beschermd wordt door primaire waterkeringen of door hoge gronden
4. een gebied dat langs de duinen ligt en Nederland beschermt

Wat is het voordeel van dijkringen?

1. Je hoeft daardoor niet meer te letten op de waterveiligheid
2. Als de ene dijkring zou overstromen, gaat niet gelijk de andere dijkring overstromen
3. Je kan water van dijkring naar dijkring sturen
4. Je hoeft minder dijken aan te leggen

HW AK

2 en 3

(voor 3 heb je eventueel het internet nodig)