Premium
The Effect of Osmotic Pressure Gradients on Water Movement in Unsaturated Soil
Author(s) -
Letey J.,
Kemper W. D.,
Noonan L.
Publication year - 1969
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1969.03615995003300010010x
Subject(s) - loam , soil water , suction , osmotic pressure , pore water pressure , soil science , pressure gradient , water pressure , environmental science , geology , geotechnical engineering , chemistry , mechanical engineering , biochemistry , oceanography , engineering
Water movement, in response to osmotic pressure gradients, was measured in clay loam and sandy loam soils at soil water suctions from 0.08 to 15 bars. Movement in response to osmotic pressure gradients were compared to movement in response to hydraulic pressure gradients in the soil water suction range from 0.08 to 0.65 bars. At suction less than 0.5 bars, the amount of water moved by osmotic pressure gradients was generally less than 4% of the water moved by hydraulic gradients of equal magnitude.