Comparison of two methods of evapotranspiration calculation

The values of the evapotranspiration calculated by the energy balance method were compared with corresponding results obtained by means of the EVASU model. Experimental data were obtained during NOPEX - First Concentrated Field Effort (CFE1). The CFE1 was realized in May-June 1994 in Lövsta, Sweden. The investigated vegetation were grass, spring barley, rye and winter wheat. Taking into account the accuracy of the both compared methods used for calculation of the evapotranspiration, the obtained results can be considered as very close in the interval of evapotranspiration rates between values 0.1 mm h⁻¹ and 0.5 mm h⁻¹.

Porównano wartości ewapotranspiracji wyliczone metodą bilansu energii z wartościami uzyskanymi z modelu EVASU. Szatę roślinną stanowiły: trawy, jęczmień jary, żyto i pszenica ozima. Stwierdzono zbieżność wyników uzyskanych dwoma sposobami w zakresie przedziału ewapotranspiracji 0,1 - 0,5 mm h⁻¹.