Process of polderization in the Netherlands

green grass field under gray sky

Process of polderization in the Netherlands.

  • Construction of ring dykes separating the polders from the rest of water body/sea.
  • Construction of ring canals used for draining water pumped out of the polders.




  • Erection of a water pump/windmill for pumping water out of the polder
  • Water is pumped out into the canals
  • Land is allowed to dry
  • Soil is desalinized by flushing with fresh water or planting hardy plants
  • Deep ploughing to mix the soil with leached nutrients, addition of fertilizers
  • Dividing the land into economic units
  • Infrastructure (roads, electricity, and piped water) is laid out
  • Establishment of social amenities
  • People are settled
  • Introduction of crops starting with the hardy crops (barey, oat)




Stages in the Reclamation of Land from the Sea in Netherlands

  • Dykes were constructed to protect the land from getting flooded during high tide.
  • Ring canals were constructed to carry water from the area to be reclaimed into the sea.
  • Pumps were installed to pump out water from the area enclosed by dykes.
  • Reeds were sowed to use up excess water.
  • Drainage pipes were laid in ditches to drain water from the water table.




  • The soil was treated with chemicals to lower salinity.
  • Drained land was flushed with fresh water to remove salt from the soil.