Abstract:
The purpose of present work is to model the behavior of soil water potential (SWP). The model is constructed as a nonlinear combination of precipitation and evapotranspiration (ET). It is designed and tested with simulations of SWP with a time step of one hour. Investigation is done over data from two stations located in Borisova Garden, Sofia and Plana Mountain area for a period over one year. Verification is performed over obtained and actually measured values at both meteorological stations. It is concluded that the model adequately describes the course of SWP except in periods of drought where some deviation from measured data is observed. The designed mathematical model can be used as a tool for simulations of local soil water potential and hence for periods for which SWP values are not measured. Also SWP is important parameter controlling ozone flow through the stomata of the leaves and can be used to assess the risk of damage of vegetation caused by ground-level ozone.