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Sensors 2016, 16(9), 1526; doi:10.3390/s16091526

Potential Seasonal Terrestrial Water Storage Monitoring from GPS Vertical Displacements: A Case Study in the Lower Three-Rivers Headwater Region, China

1
School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China
2
Faculte des Science, de la Technologie et de la Communication, University of Luxembourg, 6 Rue Richard Coudenhove-Kalergi L-1359, Luxembourg
*
Authors to whom correspondence should be addressed.
Received: 16 March 2016 / Revised: 7 September 2016 / Accepted: 9 September 2016 / Published: 19 September 2016
(This article belongs to the Section Remote Sensors)
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Abstract

This study uses the observed vertical displacements of Global Positioning System (GPS) time series obtained from the Crustal Movement Observation Network of China (CMONOC) with careful pre- and post-processing to estimate the seasonal crustal deformation in response to the hydrological loading in lower three-rivers headwater region of southwest China, followed by inferring the annual EWH changes through geodetic inversion methods. The Helmert Variance Component Estimation (HVCE) and the Minimum Mean Square Error (MMSE) criterion were successfully employed. The GPS inferred EWH changes agree well qualitatively with the Gravity Recovery and Climate Experiment (GRACE)-inferred and the Global Land Data Assimilation System (GLDAS)-inferred EWH changes, with a discrepancy of 3.2–3.9 cm and 4.8–5.2 cm, respectively. In the research areas, the EWH changes in the Lancang basin is larger than in the other regions, with a maximum of 21.8–24.7 cm and a minimum of 3.1–6.9 cm. View Full-Text
Keywords: GPS; terrestrial water storage; GRACE; GLDAS; three-rivers GPS; terrestrial water storage; GRACE; GLDAS; three-rivers
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zhang, B.; Yao, Y.; Fok, H.S.; Hu, Y.; Chen, Q. Potential Seasonal Terrestrial Water Storage Monitoring from GPS Vertical Displacements: A Case Study in the Lower Three-Rivers Headwater Region, China. Sensors 2016, 16, 1526.

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