GRACE-Derived Terrestrial Water Storage Changes in the Inter-Basin Region and Its Possible Influencing Factors: A Case Study of the Sichuan Basin, ChinaReport as inadecuate




GRACE-Derived Terrestrial Water Storage Changes in the Inter-Basin Region and Its Possible Influencing Factors: A Case Study of the Sichuan Basin, China - Download this document for free, or read online. Document in PDF available to download.

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School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, Hubei, China

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Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, Guilin 541004, Guangxi, China

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Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan 430079, Hubei, China

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State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, Hubei, China

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Collaborative Innovation Center for Geospatial Technology, Wuhan University, Wuhan 430079, Hubei, China

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MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China





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Author to whom correspondence should be addressed.



Academic Editors: Cheinway Hwang, Wenbin Shen, C.K. Shum, Stéphane Calmant, Magaly Koch and Prasad S. Thenkabail

Abstract We investigate terrestrial water storage TWS changes over the Sichuan Basin and the related impacts of water variations in the adjacent basins from GRACE Gravity Recovery and Climate Experiment, in situ river level, and precipitation data. Although GRACE shows water increased over the Sichuan Basin from January 2003 to February 2015, two heavy droughts in 2006 and 2011 have resulted in significant water deficits. Correlations of 0.74 and 0.56 were found between TWS and mean river level-precipitation within the Sichuan Basin, respectively, indicating that the Sichuan Basin TWS is influenced by both of the local rainfall and water recharge from the adjacent rivers. Moreover, water sources from the neighboring basins showed different impacts on water deficits observed by GRACE during the two severe droughts in the region. This provides valuable information for regional water management in response to serious dry conditions. Additionally, the Sichuan Basin TWS is shown to be influenced more by the Indian Ocean Dipole IOD than the El Niño-Southern Oscillation ENSO, especially for the January 2003–July 2012 period with a correlation of −0.66. However, a strong positive correlation of 0.84 was found between TWS and ENSO after August 2012, which is a puzzle that needs further investigation. This study shows that the combination of other hydrological variables can provide beneficial applications of GRACE in inter-basin areas. View Full-Text

Keywords: GRACE; water storage variability; Indian Ocean Dipole; El Niño-Southern Oscillation; Sichuan Basin GRACE; water storage variability; Indian Ocean Dipole; El Niño-Southern Oscillation; Sichuan Basin





Author: Chaolong Yao 1,2, Zhicai Luo 1,3,4,5, Haihong Wang 1,* , Qiong Li 6 and Hao Zhou 6

Source: http://mdpi.com/



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