Predictions
in Ungauged Basins: Promise and Progress (Proceedings of symposium S7 held during the
Seventh IAHS Scientific Assembly at Foz do Iguaçu, Brazil, April 2005). IAHS
Publ. 303, 2006, 293-304.
Physically-based model of
heat and water transfer in frozen soil and its parameterization by basic soil data
Alexander Gelfan
Water Problems Institute, Russian
Academy of Sciences, 119991, Gubkin 3, Moscow, Russia
Abstract A physically-based model of the
hydrothermal regime of frozen soil has been developed. This model describes the
process of coupled heat and moisture transfer through homogeneous, unsaturated
frozen soil and accounts for the influence of phase changes on water flow. The
process is formulated as one-dimensional partial differential equations, which
are solved by an implicit, finite difference scheme. The model parameters are
formulated through the water retention, hydraulic conductivity and freezing point depression curve of frozen soil, which, in
turn, have been determined using the basic soil characteristics
available from soil surveys. The model has been tested on the basis of both
laboratory and field measurements. The results obtained have demonstrated an
ability of the model to predict, without intensive calibration procedure,
snowmelt runoff losses for infiltration.
Key words
frozen soil
process; parameterization; physically-based
model; ungauged basin