Abstract
Changes of soil water content were measured in three monolith lysimeters and compared with changes predicted by a soil water budgeting program and a program incorporating a finite element solution of the unsaturated soil water flow equation. Both models underestimated water uptake during periods of high evapotranspiration. While the physically based model gave accurate estimates of flow from a lysimeter in the absence of root water uptake, the empirical budget provided the more practical approach to long‐term water balance calculations.
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