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Stanovení ochlazovací funkce stromů v areálu Nadace Partnerství v Brně
 Věchetová, Tamara
The urban heat island (UHI) is one of the most important problems in urban landscapes. Trees can reduce the negative impact of UHI through shading and evapotranspiration. Goal of this thesis is to determine the cooling effect of four Norway maples (Acer platanoides) in Nadace Partnerství, the area of Otevřená zahrada in Brno. Sap Flow of these trees was measured with trunk heat balance method (THB) and has taken place during the summer of 2017. It was possible, due to seasonal measurements of tree sap flow, to calculate, how much energy was consumed for process of transpiration. The consumed energy was calculated through specific latent heat which is 2450 kJ/l. Trees were able to transpirate up to 3 685 litres of water per month (June). Monthly, 28,3 to 32,8% energy was consumed for the process of transpiration. If the trees were absent, the energy would be used for heating of the urban surface thus increasing the surrounding air temperature.
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