Analysis of spatio-temporal characteristics of land subsidence on Beijing Metro Line 15 based on entropy and transition matrix

doi:10.13474/j.cnki.11-2246.2022.0327

Abstract

Abstract: The land subsidence information of Metro Line 15 is obtained based on PS-InSAR. The entropy value of the study area from 2003 to 2019 is calculated by information theory. The transformation law of land subsidence and its relationship with the change of entropy value are analyzed through the transition matrix. It is found that from 2003 to 2020, the differential subsidence of the study area is obviously affected by the geological structure, the average annual land subsidence rate is between [-100.17, 1.19] mm/a. Before 2016, the information entropy continued to increase, and the differences in land subsidence are large. After that, the information entropy gradually decreased, and the subsidence consistency is good. The value of entropy is related to the development of land subsidence, it is higher in the serious subsidence area and lower in the stable subsidence area. Entropy value increases, the subsidence type has a high transfer out rate, and the land subsidence system is unstable. Otherwise, entropy value decreases, the transfer out rate of each subsidence type is low and the subsidence system is relatively stable.

Key words: Metro Line 15, PS-InSAR, land subsidence, entropy, evolution

CLC Number:

P258

TIAN Xiuxiu, WANG Yanbing, LI Chenxia, LI Xiaojuan, ZHU Lin. Analysis of spatio-temporal characteristics of land subsidence on Beijing Metro Line 15 based on entropy and transition matrix[J]. Bulletin of Surveying and Mapping, 2022, 0(11): 67-73.

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