In my work, I am interested in the process of root water uptake and its depth in general as well as drought stress of the vegetation. Since root water uptake is an important flow in local water balancing and thus in hydrological models, its monitoring and parameterization seems valuable. Key questions are: How to measure and calculate root water uptake in different soil layers? How is the root water uptake depth affected by gradients in aridity and seasonality?
Knowing this could be helpful to improve model results and predictions like in mesoscale hydrological models (mHM). As an additional step, I want to link the belowground water stress, represented by the root water uptake depth, with structural parameters of the plant community, which are planned to be extracted from photographic information. Such relation might be helpful to include the actual stress of the vegetation in currently existing drought monitoring tools like the German Drough Monitor.
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