A simple energy balance model of ice segregation

Abstract

Step functions of normal frost front advance in dry and wet soils are reviewed and used to introduce the geometry of the soil frost system. An energy balance equation at the initiation of ice lens growth is developed using simple physical assumptions. This model is then employed to simulate the effects of varied surface temperature depression and water table depth on the timing, position and rate of ice lens growth. Lowering the water table delays the onset of segregation but the initial heave rates are all above half a meter per year in the region examined.