What are polders in the Netherlands?
WHAT ARE POLDERS? Polders are tracts of land that lie below sea level and are reclaimed from the ocean, lakes, rivers or wetlands through the building of dykes, drainage canals and pumping stations, according to Dutch experts that CNA spoke to. “Polders are land reclamations, but not all land reclamations are polders.
What is polder agriculture?
ABSTRACT Polder is a unique form of reclaimed farmland steeped in human history of long-term adaptation to na- ture. It embodies traditional agricultural technologies, water conservancy technologies and the culture of the agri- cultural society, providing great value in terms of agricultural heritage.
Are polders bad?
“People who look at polders now straightaway say it’s bad because of their current state of disrepair. This is happening because of environmental degradation exacerbated by lack of maintenance. Without polders the coastal zone is a dangerous place for communities to reside in.
How are polders built?
polder, tract of lowland reclaimed from a body of water, often the sea, by the construction of dikes roughly parallel to the shoreline, followed by drainage of the area between the dikes and the natural coastline. Soil in areas newly reclaimed from the sea contains so much salt that most plants will not grow.
What does the word polders mean?
A polder (Dutch pronunciation: [ˈpɔldər] ( listen)) is a low-lying tract of land that forms an artificial hydrological entity, enclosed by embankments known as dikes. The three types of polder are: Land reclaimed from a body of water, such as a lake or the seabed. Flood plains separated from the sea or river by a dike.
Where are polders used?
Polders are most commonly, though not exclusively, found in river deltas, former fenlands, and coastal areas. Flooding of polders has also been used as a military tactic in the past. One example is the flooding of the polders along the Yser River during World War I.
Who built polders?
The traditional polders in The Netherlands have been formed from the 12th century onwards, when people started creating arable land by draining delta swamps into nearby rivers. In the process, the drained peat started oxidizing, thus soil levels lowered, up to river water levels and lower.
What are some problems with polders?
Polder land made up of peat (former marshland) will sink in relation to its previous level, because of peat decomposing when exposed to oxygen from the air. Polders are at risk from flooding at all times, and care must be taken to protect the surrounding dikes.
