Analysis of influence of ground settlement on gravity anomaly in urban Kunming based on InSAR technique

doi:10.13474/j.cnki.11-2246.2019.0118

Abstract

Abstract:

The principle of gravity reduction is used to deduce the effect of elevation change on the gravity observations, and the correction of gravity Bouguer anomalies, spatial corrections, and interlayer corrections due to elevation changes are calculated. Combining the years of InSAR image data of Kunming city, this paper calculates the amount of land subsidence change in the urban area. In the process of gravity data, combines InSAR technology to obtains the surface subsidence variation, obtains the accurate gravity value due to the change of geological density, and then calculates the change of the part. The impact of gravity anomalies on the Kunming area, combined with the application of gravity anomalies in earthquakes, illustrates the importance of improving the accuracy of gravity measurements in geological hazards.

Key words: gravity anomaly, spatial correction, inter-layer correction, InSAR

CLC Number:

P237

ZHANG Yong, LIU Dong, WANG Zhimin, MU Baosheng, WANG Youkun. Analysis of influence of ground settlement on gravity anomaly in urban Kunming based on InSAR technique[J]. 测绘通报, 2019, 0(4): 84-86.

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