Articles | Volume 24, issue 9
Hydrol. Earth Syst. Sci., 24, 4567–4574, 2020
https://doi.org/10.5194/hess-24-4567-2020
Hydrol. Earth Syst. Sci., 24, 4567–4574, 2020
https://doi.org/10.5194/hess-24-4567-2020

Technical note 21 Sep 2020

Technical note | 21 Sep 2020

Technical Note: Improved sampling of behavioral subsurface flow model parameters using active subspaces

Daniel Erdal and Olaf A. Cirpka

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Latest update: 02 Dec 2021
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Short summary
Assessing model sensitivities with ensemble-based methods can be prohibitively expensive when large parts of the plausible parameter space result in model simulations with nonrealistic results. In a previous work, we used the method of active subspaces to create a proxy model with the purpose of filtering out such unrealistic runs at low cost. This work details a notable improvement in the efficiency of the original sampling scheme, without loss of accuracy.