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A partial explanation of the dependency of hydraulic conductivity on positive pore water pressure in peat soils
Author(s) -
Baird Andrew J.,
Gaffney Simon W.
Publication year - 1995
Publication title -
earth surface processes and landforms
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.294
H-Index - 127
eISSN - 1096-9837
pISSN - 0197-9337
DOI - 10.1002/esp.3290200607
Subject(s) - hydraulic conductivity , pore water pressure , peat , soil water , methane , geology , water retention , soil science , geotechnical engineering , conductivity , chemistry , ecology , organic chemistry , biology
Part of the relationship between positive pore water pressures and hydraulic conductivity in peat soils may be explained by accumulations of methane bubbles. We show how compression and expansion of gas bubbles with changes in pore water pressure could cause changes in hydraulic conductivity and thus help to explain some observations of dependency of hydraulic conductivity in peats on pore water pressure. Consideration is also given to the effect on hydraulic conductivities of methane gas going into solution with increase in pore water pressure.