Research Information System
EWRA 10th World Congress on Water Resources and Environment, Atina, Greece, 5 - 09 July 2017, vol.1, no.1, pp.1609-1613
Transpiration is calculated as a component of evapotranspiration for planning water resources in watershed scale. Since the risk of water shortages is quite high for near future because of growing population, this information is important for water conservation and planning studies especially in sub-humid and semi-arid areas of Turkey where vegetation can take up significant amount of water. To present this fact, water consumption of a single full grown sessile oak (Quercus petraea (Matt.) Liebl.) was determined in daily basis by the tissue heat balance method in Belgrad Forest, Istanbul. Study period covered one growing season in 2016. The sample tree was 18.5 m in height, 34.5 cm in diameter at breast height. Mean air temperature, humidity, and precipitation were 17.4°C, 76.6 (%) and 368 mm respectively, during the study period. The maximum transpiration was 162.4 kg day-1 in July and the minimum was 0.78 kg day-1 in the first day of April. Total amount of water consumption by this single tree in the whole growing season was 18325 kg. Results of this study revealed that water consumption of the vegetation cover should be taken into account for effective water management in addition to increasing water yield and improving water quality.