Articles | Volume 27, issue 6
https://doi.org/10.5194/hess-27-1301-2023
https://doi.org/10.5194/hess-27-1301-2023
Research article
 | 
27 Mar 2023
Research article |  | 27 Mar 2023

Impact of parameter updates on soil moisture assimilation in a 3D heterogeneous hillslope model

Natascha Brandhorst and Insa Neuweiler

Model code and software

TSMP HPSCTerrSys https://github.com/HPSCTerrSys/TSMP

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Short summary
Data assimilation aims at quantifying and minimizing model uncertainty. In hydrological models, this uncertainty is mainly caused by the uncertain soil hydraulic parameters and their spatial variability. In this study, the impact of updating these parameters along with the model states on the estimated soil moisture is investigated. It is shown that parameter updates are beneficial and that it is advisable to resolve heterogeneous structures instead of applying a simplified soil structure.