Work

Multi-scale land surface deformation monitoring and driving factors analysis with intermittent SBAS in Bohai Bay, China

Year: 2025

Type: article

Abstract: With the acceleration of global warming, coastal cities with high populations and rapid urban construction are more vulnerable to the combined effects of sea level rise and land subsidence. In the Bohai Bay region, which is characterized by significant urbanization and natural resource extraction, monitoring land subsidence is crucial for risk mitigation. This study first validated the InSAR results by comparing them with Global Navigation Satellite System (GNSS) data, showing an average RMSE of 7.22 mm. We then used Intermittent Small Baseline Subsets (ISBAS) InSAR techniques to monitor multi-scale surface deformation over Bohai Bay, employing 662 Sentinel-1A/B images from January 2020 to June 2023. The Independent Component Analysis (ICA) method and Okada model were used to extract deformation components and analyze the mechanisms. Results show significant subsidence in the Yellow River Delta (YRD), with a maximum deformation rate of 235 mm/a. This study provides crucial insights for land subsidence prevention in the Bohai Bay region.

Source: Geomatics Natural Hazards and Risk

DOI: 10.1080/19475705.2025.2608918

Authors: Haolin Zhao, Chaoying Zhao, Guangrong Li, Ming Yan

Institution: Chang'an University

Language: English

Topic: Synthetic Aperture Radar (SAR) Applications and Techniques

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Sustainable cities and communities, Climate action

Open Access status: gold

Estimated APC paid: $1,790