Estimation of quantitative measures of total water storage variation from GRACE and GLDAS-NOAH satellites using geospatial technology

Singh, Anil Kumar and Jasrotia, Avtar Singh and Taloor, Ajay Kumar and Kotlia, Bahadur Singh and Kumar, Vaibhav and Roy, Sagarika and Ray, Prashant Kumar Champati and Singh, Kamalesh Kumar and Singh, Anoop Kumar and Sharma, Arun Kumar (2017) Estimation of quantitative measures of total water storage variation from GRACE and GLDAS-NOAH satellites using geospatial technology. In: Quaternary International, 444 . pp. 191-200. ISSN 10406182

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Abstract

This study represents the first attempt to examine spatial and seasonal variations of the surface water budget by using the Gravity Recovery and Climate Experiment (GRACE) by measuring gravity anomalies on earth to estimate changes in Total Water Storage (TWS) content over the north-western region of the India including New Delhi and states of Rajasthan, Uttar Pradesh and Haryana, covering an area of 676,917 km2. The TWS (surface plus ground) and its changes were estimated from 2003 to 2012. Additionally, Global Land Data Assimilation System (GLDAS) variables were used to infer as to how TWS was partitioned into canopy water and soil moisture components. To evaluate monthly accumulated rainfall, Tropical Rainfall Measuring Mission (TRMM) data, processed by the Global Precipitation Climatology Center (GPCC) were used. By computing storage changes in GRACE, TWS, GLDAS land surface state variables and terrestrial-based water balance approach, we calculated groundwater storage changes. The time-series comparisons show good agreement between the GRACE satellite data, GLDAS model data and computed groundwater data. The change in soil moisture storage is less than that in saturated storage. Both the GRACE and calculated groundwater storage changes indicate storage loss in the range of 86.43 km3/y ± average of 10 years data (in terms of equivalent water thickness). The average groundwater loss for was calculated as 9.7 ± km3/y, states of Haryana as 9.7 ± km3/y, Rajasthan as 33.199 ± km3/y and Uttar Pradesh as 44.4827 ± km3/y. Our results are convincing of a credible GRACE hydrology data which can be handy in monitoring storage dynamics and water availability at regional scale. As GRACE data are available for virtually every region of the world, their application in conjunction with hydrological models will improve applications of hydrological studies which may lead not only to water balance closures, but also to sustainable water resource management at regional scale.

Item Type:	Journal Article
Publication:	Quaternary International
Publisher:	Elsevier Ltd
Additional Information:	The copyright of this article belongs to the Elsevier Ltd.
Keywords:	Geospatial technology; GLDAS; GRACE; Quantitative measures; Total water storage (TWS)
Department/Centre:	Division of Mechanical Sciences > Centre for Earth Sciences
Date Deposited:	31 May 2022 05:27
Last Modified:	31 May 2022 05:27
URI:	https://eprints.iisc.ac.in/id/eprint/72891

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