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

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)



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


Posted on February 24, 2014 .