Long-term groundwater variations in Northwest India from satellite gravity measurements

Chen, Jianli; Jin, Li; Zhang, Zizhan; Ni, Shengnan

doi:10.1016/j.gloplacha.2014.02.007

Cited by 235 publications

(158 citation statements)

References 22 publications

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“…However, GRACE measurements have indeed captured some interesting long-term regional groundwater changes over the world that can be verified by either in situ groundwater level data or analysis of precipitation data. GRACE-observed long-term regional groundwater changes include significant groundwater depletion in northwest and northern India (Rodell et al 2009;Tiwari et al 2009;Chen et al 2014), the Middle East Joodaki et al 2014), California's Central Valley Scanlon et al 2012a), and the southern MDB in Australia (Leblanc et al 2009Chen et al 2015a), and lower groundwater depletions in the NCP in China ) and HPA in the USA (Strassberg et al 2009;Scanlon et al 2012b;Famiglietti and Rodell 2013). (Geruo et al 2013).…”

Section: Groundwater Depletion From Gracementioning

confidence: 99%

“…Using an extended record of GRACE measurements combined with Global Land Data Assimilation System (GLDAS) snow and soil water storage estimates, and a different method for correcting leakage bias of GRACE estimates, Chen et al (2014) reassessed the groundwater depletion rate in the NWI region. The newly estimated groundwater depletion rate is 20.4 ± 7.1 km 3 /year (2.4 ± 0.59 cm/year) averaged over the 10-year period January 2003-December 2012.…”

Section: Groundwater Depletion In North West Indiamentioning

confidence: 99%

“…The groundwater depletion in NWI occurred in a broad region that includes neighboring Punjab Province of Pakistan (especially northern Punjab) (see Fig. 1 of Chen et al 2014).…”

Section: Groundwater Depletion In North West Indiamentioning

confidence: 99%

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Groundwater Storage Changes: Present Status from GRACE Observations

Chen

Famigliett

Scanlon

et al. 2016

Space Sciences Series of ISSI

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Satellite gravity measurements from the Gravity Recovery and Climate Experiment (GRACE) provide quantitative measurement of terrestrial water storage (TWS) changes with unprecedented accuracy. Combining GRACE-observed TWS changes and independent estimates of water change in soil and snow and surface reservoirs offers a means for estimating groundwater storage change. Since its launch in March 2002, GRACE time-variable gravity data have been successfully used to quantify long-term groundwater storage changes in different regions over the world, including northwest India, the High Plains Aquifer and the Central Valley in the USA, the North China Plain, Middle East, and southern Murray-Darling Basin in Australia, where groundwater storage has been significantly depleted in recent years (or decades). It is difficult to rely on in situ groundwater measurements for accurate quantification of large, regional-scale groundwater storage changes, especially at long timescales due to inadequate spatial and temporal coverage of in situ data and uncertainties in storage coefficients. The now nearly 13 years of GRACE gravity data provide a successful and unique complementary tool for monitoring and measuring groundwater changes on a global and regional basis. Despite the successful applications of GRACE in studying global groundwater storage change, there are still some major challenges limiting the application and interpretation of GRACE data. In this paper, we present an overview of GRACE applications in groundwater studies and discuss if and how the main challenges to using GRACE data can be addressed.

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Section: Groundwater Depletion From Gracementioning

confidence: 99%

Section: Groundwater Depletion In North West Indiamentioning

confidence: 99%

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Groundwater Storage Changes: Present Status from GRACE Observations

Chen

Famigliett

Scanlon

et al. 2016

Space Sciences Series of ISSI

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“…Therefore, if the actual distribution of water is not evaluated, there can be significant error in the ∆TWS analysis of the GRACE signal. Many previous studies estimated GW storage changes by subtracting GRACE ∆TWS by the sum of other storage compartments derived from model outputs [57][58][59]. However, in this study, the role of ground water storage is neglected because of the non-availability of the data.…”

Section: Discussionmentioning

confidence: 99%

Water Budget Analysis within the Surrounding of Prominent Lakes and Reservoirs from Multi-Sensor Earth Observation Data and Hydrological Models: Case Studies of the Aral Sea and Lake Mead

et al. 2016

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Abstract:The hydrological budget of a region is determined based on the horizontal and vertical water fluxes acting in both inward and outward directions. These integrated water fluxes vary, altering the total water storage and consequently the gravitational force of the region. The time-dependent gravitational field can be observed through the Gravity Recovery and Climate Experiment (GRACE) gravimetric satellite mission, provided that the mass variation is above the sensitivity of GRACE. This study evaluates mass changes in prominent reservoir regions through three independent approaches viz. fluxes, storages, and gravity, by combining remote sensing products, in-situ data and hydrological model outputs using WaterGAP Global Hydrological Model (WGHM) and Global Land Data Assimilation System (GLDAS). The results show that the dynamics revealed by the GRACE signal can be better explored by a hybrid method, which combines remote sensing-based reservoir volume estimates with hydrological model outputs, than by exclusive model-based storage estimates. For the given arid/semi-arid regions, GLDAS based storage estimations perform better than WGHM.

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“…The size of Lake Volta is well below the typical spatial resolutions (~300 km or~100,000 km 2 in area) of GRACE gravity solutions, making it nearly impossible to use regular GRACE solutions to quantify the water storage change of Lake Volta. To overcome the limitation, we apply the constrained forward modeling method [21,22] to remove GRACE leakage error, and restore the true magnitude of the signal. After this leakage correction, the magnitude of the signal is in good agreement with satellite altimetry observations.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Water Storage Changes of Lake Volta from GRACE and Satellite Altimetry and Connections with Regional Climate

Chen

Wilson

et al. 2017

Remote Sensing

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Satellite gravity data from the Gravity Recovery and Climate Experiment (GRACE) provides a quantitative measure of terrestrial water storage (TWS) change at different temporal and spatial scales. In this study, we investigate the ability of GRACE to quantitatively monitor long-term hydrological characteristics over the Lake Volta region. Principal component analysis (PCA) is employed to study temporal and spatial variability of long-term TWS changes. Long-term Lake Volta water storage change appears to be the dominant long-term TWS change signal in the Volta basin. GRACE-derived TWS changes and precipitation variations compiled by the Global Precipitation Climatology Centre (GPCC) are related both temporally and spatially, but spatial leakage attenuates the magnitude of GRACE estimates, especially at small regional scales. Using constrained forward modeling, we successfully remove leakage error in GRACE estimates. After this leakage correction, GRACE-derived Lake Volta water storage changes agree remarkably well with independent estimates from satellite altimetry at interannual and longer time scales. This demonstrates the value of GRACE estimates to monitor and quantify water storage changes in lakes, especially in relatively small regions with complicated topography.

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Long-term groundwater variations in Northwest India from satellite gravity measurements

Cited by 235 publications

References 22 publications

Groundwater Storage Changes: Present Status from GRACE Observations

Groundwater Storage Changes: Present Status from GRACE Observations

Water Budget Analysis within the Surrounding of Prominent Lakes and Reservoirs from Multi-Sensor Earth Observation Data and Hydrological Models: Case Studies of the Aral Sea and Lake Mead

Long-Term Water Storage Changes of Lake Volta from GRACE and Satellite Altimetry and Connections with Regional Climate

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