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

Sensors

Qiang Chen¹  Bao Zhang²  Hok Sum Fok²  Yibin Yao²  Yufeng Hu² 

[1] Faculte des Science, de la Technologie et de la Communication, University of Luxembourg, 6 Rue Richard Coudenhove-Kalergi L-1359, Luxembourg;School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;

关键词: GPS;    terrestrial water storage;    GRACE;    GLDAS;    three-rivers;   

DOI  :  10.3390/s16091526

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown