EN
In the paper has been described the model structure of the vertical water circulation in the unit basin represented by the quasi-homogenous column containing the soil monolith overgrown by the forest phytocenosis with well formed four-layered structure. The model describes the processes of the vertical mass and energy exchange on the contact of the atmosphere, biosphere and pedosphere /interception, evapotranspiration and soil moisture variation under the influence of the infiltration and evapotranspiration processes/. All the hydrological processes have been described with the mathematic physics and parameters were determined by the direct measurements in the field. The verification of the component models has been performed in the experimental basin in Murzynowo near Płock on the data from the observational period from 17 to 21 July 1987. The verification has been carried out in two phases. The basis of the I verification was the comparison of the measured and computed feeding values of the forest ground. In the II phase the basis of the verification was comparison fo the measured and simulated soil moisture profiles in the unsaturated zone. The achieved results may be estimated as fairly good, but this problem requires further investigations, especially in the experimental field.