Published in Scientific Papers. Series A. Agronomy, Vol. LXII, Issue 1
Written by Daniel DUNEA, Ștefania IORDACHE, Virgil IORDACHE, Larisa PURCOI, Laurențiu PREDESCU
The paper presents the results obtained from monitoring the evapotranspiration processes in riparian grasslands located in Poeni village, Romania near Glavacioc River and the testing of portable instrumentation developed to monitor continuously the potential evapotranspiration (PET). The Penman-Monteith method was selected for the experimental study of PET groundwater dependent ecosystems in the INTER-ASPA project. The microclimate measurements for evapotranspiration assessments were performed between September 14 and 19, 2018. Following the preliminary mapping of the herbaceous vegetation, 12 species of grasses, 5 legumes and 23 species from other botanical families were identified. The PET varied from 0.71 to 1.07 (trees), 0.57 to 0.95 (shrubs), and 0.58 to 1.04 mm day-1 (grassland). The 7 days average of the geometrical mean of all vegetated surfaces was 0.86 mm day-1, which can be considered a descriptive constant for the Poeni riparian ecosystem for the period of measurements. The PET rates varied significantly especially from wind speed, solar radiation and temperature fluctuations. It was found that grassland canopy had PET rates higher than the taller canopy of shrubs and very close to the tree canopy.
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