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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 21, issue 4
Hydrol. Earth Syst. Sci., 21, 2053–2074, 2017
https://doi.org/10.5194/hess-21-2053-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Hydrol. Earth Syst. Sci., 21, 2053–2074, 2017
https://doi.org/10.5194/hess-21-2053-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 18 Apr 2017

Research article | 18 Apr 2017

Improving estimates of water resources in a semi-arid region by assimilating GRACE data into the PCR-GLOBWB hydrological model

Natthachet Tangdamrongsub et al.
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ED: Publish subject to minor revisions (further review by Editor) (15 Feb 2017) by Stefan Uhlenbrook
AR by Natthachet Tangdamrongsub on behalf of the Authors (24 Feb 2017)  Author's response    Manuscript
ED: Publish as is (16 Mar 2017) by Stefan Uhlenbrook
Publications Copernicus
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Short summary
This paper investigates the assimilation of terrestrial water storage variation estimates derived from GRACE data using an EnKF 3D approach. The spatially correlated errors in GRACE data derived from its full error variance–covariance matrices were taken into account. The experiments showed that GRACE DA improved the accuracy of groundwater storage estimates by as much as 25 % over the Hexi Corridor. The inclusion of error correlations provided an equal or greater improvement in the estimates.
This paper investigates the assimilation of terrestrial water storage variation estimates...
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