@article{Ireson-2022-Using,
title = "Using observed soil moisture to constrain the uncertainty of simulated hydrological fluxes",
author = "Ireson, A. M. and
Sanchez‐Rodriguez, Ines and
Basnet, Sujan and
Brauner, Haley and
Bobenic, Talia and
Brannen, Rosa and
Elrashidy, Mennatullah and
Braaten, Morgan and
Amankwah, Seth K. and
Barr, Alan",
journal = "Hydrological Processes, Volume 36, Issue 1",
volume = "36",
number = "1",
year = "2022",
publisher = "Wiley",
url = "https://gwf-uwaterloo.github.io/gwf-publications/G22-89001",
doi = "10.1002/hyp.14465",
abstract = "Using data from five long-term field sites measuring soil moisture, we show the limitations of using soil moisture observations alone to constrain modelled hydrological fluxes. We test a land surface model, Mod{\'e}lisation Environnementale communautaire-Surface Hydrology/Canadian Land Surface Scheme, with two configurations: one where the soil hydraulic properties are determined using a pedotransfer function (the texture-based calibration) and one where they are assigned directly (the hydraulic properties-based calibration). The hydraulic properties-based calibration outperforms the texture-based calibration in terms of reproducing changes in soil moisture storage within a 1.6 m deep profile at each site, but both perform reasonably well, especially in the summer months. When the models are constrained using observations of changes in soil moisture, the predicted hydrological fluxes are subject to very large uncertainties associated with equifinality. The uncertainty is larger for the hydraulic properties-based calibration, even though the performance was better. We argue that since the pedotransfer functions constrain the model parameters in the texture-based calibrations in an unrealistic way, the texture-based calibration underestimates the uncertainty in the fluxes. We recommend that reproducing observed cumulative changes in soil moisture storage should be considered a necessary but insufficient criterion of model success. Additional sources of information are needed to reduce uncertainties, and these could include improved estimation of the soil hydraulic properties and direct observations of fluxes, particularly evapotranspiration.",
}
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<abstract>Using data from five long-term field sites measuring soil moisture, we show the limitations of using soil moisture observations alone to constrain modelled hydrological fluxes. We test a land surface model, Modélisation Environnementale communautaire-Surface Hydrology/Canadian Land Surface Scheme, with two configurations: one where the soil hydraulic properties are determined using a pedotransfer function (the texture-based calibration) and one where they are assigned directly (the hydraulic properties-based calibration). The hydraulic properties-based calibration outperforms the texture-based calibration in terms of reproducing changes in soil moisture storage within a 1.6 m deep profile at each site, but both perform reasonably well, especially in the summer months. When the models are constrained using observations of changes in soil moisture, the predicted hydrological fluxes are subject to very large uncertainties associated with equifinality. The uncertainty is larger for the hydraulic properties-based calibration, even though the performance was better. We argue that since the pedotransfer functions constrain the model parameters in the texture-based calibrations in an unrealistic way, the texture-based calibration underestimates the uncertainty in the fluxes. We recommend that reproducing observed cumulative changes in soil moisture storage should be considered a necessary but insufficient criterion of model success. Additional sources of information are needed to reduce uncertainties, and these could include improved estimation of the soil hydraulic properties and direct observations of fluxes, particularly evapotranspiration.</abstract>
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%0 Journal Article
%T Using observed soil moisture to constrain the uncertainty of simulated hydrological fluxes
%A Ireson, A. M.
%A Sanchez‐Rodriguez, Ines
%A Basnet, Sujan
%A Brauner, Haley
%A Bobenic, Talia
%A Brannen, Rosa
%A Elrashidy, Mennatullah
%A Braaten, Morgan
%A Amankwah, Seth K.
%A Barr, Alan
%J Hydrological Processes, Volume 36, Issue 1
%D 2022
%V 36
%N 1
%I Wiley
%F Ireson-2022-Using
%X Using data from five long-term field sites measuring soil moisture, we show the limitations of using soil moisture observations alone to constrain modelled hydrological fluxes. We test a land surface model, Modélisation Environnementale communautaire-Surface Hydrology/Canadian Land Surface Scheme, with two configurations: one where the soil hydraulic properties are determined using a pedotransfer function (the texture-based calibration) and one where they are assigned directly (the hydraulic properties-based calibration). The hydraulic properties-based calibration outperforms the texture-based calibration in terms of reproducing changes in soil moisture storage within a 1.6 m deep profile at each site, but both perform reasonably well, especially in the summer months. When the models are constrained using observations of changes in soil moisture, the predicted hydrological fluxes are subject to very large uncertainties associated with equifinality. The uncertainty is larger for the hydraulic properties-based calibration, even though the performance was better. We argue that since the pedotransfer functions constrain the model parameters in the texture-based calibrations in an unrealistic way, the texture-based calibration underestimates the uncertainty in the fluxes. We recommend that reproducing observed cumulative changes in soil moisture storage should be considered a necessary but insufficient criterion of model success. Additional sources of information are needed to reduce uncertainties, and these could include improved estimation of the soil hydraulic properties and direct observations of fluxes, particularly evapotranspiration.
%R 10.1002/hyp.14465
%U https://gwf-uwaterloo.github.io/gwf-publications/G22-89001
%U https://doi.org/10.1002/hyp.14465
Markdown (Informal)
[Using observed soil moisture to constrain the uncertainty of simulated hydrological fluxes](https://gwf-uwaterloo.github.io/gwf-publications/G22-89001) (Ireson et al., GWF 2022)
ACL
- A. M. Ireson, Ines Sanchez‐Rodriguez, Sujan Basnet, Haley Brauner, Talia Bobenic, Rosa Brannen, Mennatullah Elrashidy, Morgan Braaten, Seth K. Amankwah, and Alan Barr. 2022. Using observed soil moisture to constrain the uncertainty of simulated hydrological fluxes. Hydrological Processes, Volume 36, Issue 1, 36(1).
