pressure deficiency

syn. matrix suction; moisture suction; moisture tension; soil moisture tension; suction

Negative pressure (suction) to which water must be subjected in order to be in hydraulic equilibrium, through a porous permeable wall or membrane, with the water of the soil. (IGH)

 

Source:

UNESCO/WMO International Glossary of Hydrology (2nd revised ed., 1992)

Posted on February 23, 2014 .