The variation of terrestrial water storage in the Qaidam Basin based on GRACE data
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Abstract:
The terrest rial water storage( TWS) is an important indicator of regional water resources changes and water balance. The Gravity Recovery and Climate Experiment ( GRACE) offers the data fo r research of variation in large-scale TWS. In this paper, we used the data of GRACE RL05 and the in-situ dataset to discover the spatial and temporal variation of TWS and its causes during 2003-2015 in the Qaidam Basin. The results showed that the variation of TWS showed an upward trend, with an ascending velocity of about 0.26 mm permonth. The multi year average increment of TWS gradually declined from the south to the north, and it ranged bet ween 8.29-69. 38 mm. The rise of TWS was consistent with the ascending trend of precipitation in the study area. The method based on GRACE data to calculate TWS can provide animportant support for the assessment of TWS variation in data-scarce region in the northwest of China.
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