University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Jakob Mitterhauser
(2022):
Einfluss von Bewässerung auf die Kühlwirkung von Grünflächen: Beispiel Rudolf-Bednar-Park, Wien.
Master / Diploma Thesis - Institut für Meteorologie und Klimatologie,
BOKU-Universität für Bodenkultur,
pp 73.
UB BOKU
obvsg
- Abstract:
- Since an overheated city reduces human comfort and quality of life, climate change adaptation and measures to reduce the heat have been the focus for years. It is known that vegetation cools the environment through evaporation and shade. Another approach to mitigating heat, that is still poorly understood, is the influence of irrigation on the cooling effect of green spaces. Climate change is causing longer dry periods and rising temperatures; for example in Vienna, there are more hot days, increased evaporation and a negative water balance. Irrigation ensures the water supply for evaporation and among other things, leads to the conversion of sensible to latent heat. In particular, peak temperature reduction during heat waves can be achieved through irrigation. As part of this work, a simulation of the Rudolf-Bednar-Park in the 2nd district of Vienna was carried out using the microscale urban climate model ENVI-met. The influence of irrigation was simulated by changing soil moisture using three scenarios. The results of the study show that increased soil moisture enhances the cooling effect. Air and surface temperature as well as thermal comfort were analyzed. It became clear that dry green areas have a negative effect on the wellbeing. The difference in the maximum air temperature of the park between the dry and the irrigated scenario is between 1.2 and 1,6 °C. The results of the simulation should be validated in subsequent work by on-site measurements. The analysis of the literature and the simulation illustrate that more research in the field of irrigation cooling is needed. Irrigation is a potential approach to mitigating urban temperature extremes. The targeted and sustainable use of water in cities like Vienna can make a valuable contribution to climate change adaptation.
- Beurteilende*r: Weihs Philipp