Water and energy fluxes at and between the land surface/subsurface and the atmosphere are inextricably intertwined. In recent years, detailed observations of both water and energy fluxes in medium sized catchments became possible via new hydro-meteorological observatories like TERENO. This supports and enables the further development and evaluation of fully physically-based hydrological model systems that do not parameterize or even neglect specific parts of the energy balance and fluxes. We present results of a high resolution distributed modelling study based on the GEOtop model. It is applied to simulate both the water and energy balance and fluxes in the preAlpine environment of a medium size catchment in Bavaria, southern Germany, surrounding the TERENO-preAlpine test site, Fendt. Our simulations have a spatial resolution of 90 m and an hourly temporal resolution. We intercompare simulation results with observed streamflow measurements and energy flux observations obtained at an eddy-covariance tower.