- Influence of Snow Cover on the Water Balance:
A combined measurement and modeling approach aims to better characterize the role of snow cover in the water balance for the Stoderzinken site. For this purpose, the isotope ratios (18O/16O and 2H/1H) in the snow cover and in the lysimeter seepage water are measured. This allows for the determination of the proportion of snowmelt in the seepage water as well as the calculation of the mean residence time of the snowmelt in the unsaturated zone. The measurements serve to calibrate and validate the snow cover model. Using the snow cover model, the retention or contribution from snowmelt, as well as its temporal changes, can be quantified. Repeated measurements of the spatial distribution of snow depth will also account for the uncertainty of the snow measurements due to spatial variability. - Behavior of Water Balance Components in Extreme Years/Periods:
The year-to-year fluctuations and extreme values of the water balance components can be quantified from the available time series measurements. This requires, first, careful quality control of the measurement data. The time series can then be analyzed and their plausibility checked using the model. - Comparison of results with a valley location:
By using an additional valley location (Gumpenstein), the elevation dependencies of the individual components of the water balance are determined. This is expected to improve the spatially distributed modeling of water balance components in the future. Such data are of great interest beyond the study area as a basis for model simulations. - Effects of water balance on yield and vegetation dynamics
Since biomass data has been collected at the lysimeter since 2005, a long-term relationship between water balance parameters and yield dynamics can be analyzed and interpreted.
Water balance Stoder
Water balance Stoder