OBSERVATIONS OF FREEZING-INDUCED REDISTRIBUTION IN SOIL LYSIMETERS

Data are presented of vertical profiles of soil water potential and so il temperature from a field lysimeter experiment with automatic water- table control at Silwood Park, Ascot, UK. The observed water-table flu xes confirm the analysis of profile response, which shows a diurnal pa ttern of upward water movement as a result of surface freezing, follow ed by reversed flow when soil thawing occurs. The results provide a cl ear, and relatively rare, illustration of the phenomenon of freezing-i nduced redistribution.