Research on surface deformation in Zhengzhou urban area from 2019 to 2023 integrating PS and DS methods

doi:10.13474/j.cnki.11-2246.2025.0223

Abstract

Abstract: In order to accurately achieve the deformation of the surface displacements of Zhengzhou city, the DS-InSAR technology fusing with high coherence points and distributed targets is employed with 50 Sentinel-1A images acquired from January 2019 to December 2023. And thus the annual ground displacements rate and the cumulative displacements are obtained in the main urban districts. The results indicate that the increasing districts are mainly located in Zhengzhou central area, especially in extracting groundwater in prohibited areas, whereas the settlement regions are distributed in eastern regions and Zhongmu county. And then the deformation in typical area is further analyzed, which shows that the serious sinking regions are located in Baisha town, Zhongmu county, in which the maximum subsidence rate is up to 20.0 mm/a. Furthermore, other sinking districts are scattered over the areas in various villages and towns. The investigation in this paper provides reference for the urban planning and construction of Zhengzhou.

Key words: Zhengzhou, surface displacements, DS-InSAR, PS-InSAR

CLC Number:

P237

ZHANG Shiyu, ZHANG Ziqi, LI Wenwen, GAO Tingting, QI Ligang, CAO Hongwen. Research on surface deformation in Zhengzhou urban area from 2019 to 2023 integrating PS and DS methods[J]. Bulletin of Surveying and Mapping, 2025, 0(2): 127-131.

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