Abstract
Using eight years of time-variant gravity measurements from the GRACE gravity satellite mission, we estimate monthly terrestrial water storage variations in the North China Plain between August 2002 and August 2010. We find that during this period, the water storage is not constant but accelerate at a rate of −1.1 cm/yr over time. The study confirms that the relatively long-term trend of water storage in the North China Plain (by 13-point moving average) is consistent well with that by linear fitting. Two hydrological models, CPC and GLDAS, are adopted in calculating surface water variations, with results indicating that they agree with those of GRACE. Furthermore, rates of −0.6 cm/yr for surface water variations and −0.5 cm/yr for groundwater variations are found in the North China Plain during the study period. Decrease of rainfall and the groundwater over-exploitation are possibly the main causes for groundwater depletion in the North China Plain. The results will be helpful for better understanding climatic changes and provide reference for the management of water resources and the establishment of policies on preventing and alleviating natural hazards.
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Su, X., Ping, J. & Ye, Q. Terrestrial water variations in the North China Plain revealed by the GRACE mission. Sci. China Earth Sci. 54, 1965–1970 (2011). https://doi.org/10.1007/s11430-011-4280-4
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DOI: https://doi.org/10.1007/s11430-011-4280-4
Keywords
- GRACE
- gravity measurements
- groundwater
- the North China Plain