Identifying spatiotemporal pattern and trend prediction of land subsidence in Zhengzhou combining MT-InSAR, XGBoost and hydrogeological analysis.

ABSTRACT: Zhengzhou city (China) experienced relatively significant land deformation following the July 20, 2021, extreme rainstorm (7·20 event). This study jointly utilised Multi-temporal synthetic aperture radar interferometry (MT-InSAR), eXtreme Gradient Boosting (XGBoost), and hydrogeological analysis to quantitatively assess the extent and trends, as well as the causes of land deformation before and after the 7·20 event in Zhengzhou city. The findings detected three major subsidence zones and two uplift zones within the city. The most significant subsidence occurred in the northern part of Zhongmu (- 28 mm/year), the northwest of Xingyang (- 16 mm/year), and the western region of Gongyi (- 6 mm/year). Conversely, a notable uplift was observed in the central city district (13 mm/year) and Xinzhe

SUBMITTER: Zhou Z 

PROVIDER: S-EPMC11785778 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature