Dead water (soil science)

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Dead water is water that is firmly bound in the ground and can not be absorbed by plants .

The reason for the firm binding of the water in fine-pored (loose) rock is the capillary effect . The smaller the pores, the higher the suction pressure . Pores with a diameter of 0.3 to 0.2 µm generate suction stresses of 10,000 to 15,000 hPa. With these suction stresses, sand can bind around 3% by volume, clay 15% and clay around 35% by volume.

Suction pressure of sand, silt, loam and clay depending on the soil moisture

credentials

  1. ^ Ad-hoc working group Soil: Soil-scientific mapping instructions. 5th, improved and enlarged edition. Schweizerbart, Stuttgart 2005, ISBN 3-510-95920-5 .

See also