Modelling transpiration of street trees along an urbanization gradient in the city of Brunswick, Germany

This thesis focuses on modelling the transpiration of street trees along an urbanisation gradient in the city of Braunschweig, Germany. Urban trees play a crucial role in mitigating urban heat islands, improving air quality, and enhancing urban microclimates. However, urbanisation, through surface sealing and reduced soil permeability, significantly impacts tree water relations and their overall ecohydrological functions. Using the SurEau-Ecos model, this study investigates species-specific water dynamics, focusing primarily on Tilia cordata. Field measurements and modelling approaches are integrated to analyse the impact of different urbanisation levels on soil moisture, sap flow, rooting depth, and hydraulic safety margins. The outcomes provide valuable insights for urban planning and tree management strategies to improve urban resilience.