Polders come in different shapes and sizes. There are a few types of polders:
Sea polders, these were reclaimed pieces of land from the sea.
Peat polders, These were pieces of swamp area which were drained. (when you drain these types of polders, they will start compacting.)
Reclaimed lakes, these were reclaimed by pumping lakes dry. Examples are the Haarlemmermeer and the Beemster.
Parts of the Zuiderzee (IJsselmeer) were drained to create land.
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Danger at the coast
Due to climate change, the Netherlands will stand against more dangers. Rising sea levels and storms could wash away our first line of defence: the foredune
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Dealing with problems along the coast
Dykes are strengthened where necessary. Dykes are needed because coastal erosion takes away our first line of defence.
The Dutch use dynamic coastal management. This is a way to let the ocean relief itself.
Using the Waddenzee as a tidal landscape for water to escape to.
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How can we avoid floods on long-term?
Slide 9 - Mind map
Working
Make assignment 1, 2 and 3
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Learning goals
You know what types of polders there are and that there are misconceptions about safety.
You understand why the flood risk of the Netherlands below sea level is increasing and how the coast is being protected against it.
You can indicate various polders and coastal areas on the map of the Netherlands.