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Fakourian, Mohammad Hossein, Naderi, Mostafa, and Joodaki, Gholamreza, 2025. Downscaling GRACE-scale groundwater storage variations to aquifer scales: A linear regression approach based on the water balance concept. Hydrogeology Journal, .
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025HydJ..tmp...22F,
author = {{Fakourian}, Mohammad Hossein and {Naderi}, Mostafa and {Joodaki}, Gholamreza},
title = "{Downscaling GRACE-scale groundwater storage variations to aquifer scales: A linear regression approach based on the water balance concept}",
journal = {Hydrogeology Journal},
keywords = {Remote and satellite sensing, Groundwater storage, Downscaling method, Alluvial aquifers, Iran},
year = 2025,
month = mar,
abstract = "{A method to downscale annual groundwater storage variations from large-
scale, satellite-derived estimates to individual aquifers is
presented, employing a simple linear regression approach based
on the water balance principle. The method relies on groundwater
storage changes derived from the gravity recovery and climate
experiment (GRACE). Seven alluvial aquifers, ranging in area
from approximately 145 to 1300 km$^{2}$ in Fars Province, Iran,
were selected as case studies to evaluate the applicability of
the proposed downscaling method. The results indicate that
groundwater storage at the GRACE scale
(\raisebox{-0.5ex}\textasciitilde 31,416 km$^{2}$) has depleted
by 229 million cubic meters (MCM) per year during the study
period (2002-2015). The correlation coefficients between
downscaled and actual groundwater storage depletions varies from
0.655 to 0.891, with an average of
\raisebox{-0.5ex}\textasciitilde 0.82 across the seven aquifers,
demonstrating the method's ability to provide acceptable
downscaling results. Downscaling results indicate that the
alluvial aquifers of Aspas, Namdan, Beiza-Zarghan, Dehbid,
Abadeh-Eghlid, Bakan, and Sidan-Farugh have experienced
groundwater storage depletions of 17.71, 34.49, 46.21, 13.88,
14.11, 6.78, and 22.62 MCM per year, respectively, from 2002 to
2015, which correspond to water table declines of 0.915, 0.656,
0.822, 0.538, 0.725, 1.395, and 1.435 m/year, respectively. As a
final point, this study proposes a downscaling method that can
be applied to address groundwater storage variations at aquifer
scales, particularly in regions with unavailable or limited
data.}",
doi = {10.1007/s10040-025-02879-2},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025HydJ..tmp...22F},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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