María Nieva. 3ºC 2009-10
IES FRAY PEDRO DE URBINA
What are they for?
• They are all around the country and most of the 2/5
of Netherlands is polderized.
• If they weren’t drained, all they country would be
• The main activity is agrarian one.
• There are more than a million hectares which are
• They’re managed by pumps or drainage canals.
Types of polders I
• Pieces of sea which have been occupied by
• Flood plains separated from the sea by a dike.
• Reservoirs which are drained.
Types of polders II
• Low lying polders: Low constant water levels
are maintained because they are used in
• High lying polders: High constant water levels
are maintained and they’re used in pasture
• They avoid the land from being flooded.
• There are the famous “tulip crops”.
• They are also called pumps.
• They’re in a low lying areas.
• Andijk and Beemster are one of the most
• Felvopolders (located in Eastern and Southern