IWA Publishing

Constructed Wetlands I


Courtesy of IWA Publishing

Traditional constructed wetland are shallow planted basins for cleaning anthropogenic discharges (wastewater or polluted runoff). They were used for cleaning of:

  • domestic wastewater
  • agricultural wastewater
  • coal mine drainage
  • stormwater runoff

The main construction elements were:

  • inflow ( e.g. sedimentation part)
  • substrat (soil or gravel) with plants (marsh or water plants)
  • discharge (different structures for water depth control within the wetland)

Within the wetland the water is cleaned by complex physical, chemical and biological reaction which occur between soil, plants and microorganism (mainly in the root area). The wetlands can be divided according flow in:

  • surface flow wetlands
  • subsurface flow wetlands
  • hybrid systems

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