ANALYSIS OF SURFACE VERTICAL DEFORMATION IN NORTH CHINA PLAIN BY COMBINING GNSS AND GRACE DATA
In order to analyze the impact of environmental factors such as changes in terrestrial water storage in the North China Plain on GNSS nonlinear vertical time series,the North China Plain was studied with GRACE data and GNSS data supplemented by well water level data.The results show that the GNSS vertical displacement time series in the North China Plain has a good correlation with the GRACE load deformation,and the correlation between the corrected GNSS observation and the GRACE load deformation is greatly reduced.The reliability of the results is verified based on the static water level data of the well.The correlation coefficient between the GNSS vertical displace-ment time series after deducting the influence of GRACE load deformation and the static water level observation of the well is reduced by 40％～96.7％compared with that before deducting.Deducting the load deformation observed by GRACE from the GNSS time series can effectively reduce the im-pact of load deformation caused by environmental factors,including changes in terrestrial water re-serves,on the non-tectonic movement caused by GNSS observations.The research results provide a scientific reference for obtaining more accurate vertical tectonic deformation in the North China Plain and its surrounding areas.
NETL
NSTL
万方数据
