Multi-Scale and Multi-Dimensional Time Series InSAR Characterizing of Surface Deformation over Shandong Peninsula, China

Abstract

Shandong peninsula, the largest peninsula of China, is prone to severe land subsidence hazards along the coastline. In this paper, we provide, for the first time, multi-scale and multi-dimensional time series deformation measurements of the entire Shandong peninsula with advanced time series Interferometric Synthetic Aperture Radar (InSAR) techniques. We derive the spatiotemporal evolutions of the land subsidence by integrating multi-track Sentinel-1A/B and RADARSAT-2 satellite images. InSAR measurements are cross validated by the independent deformation rate results generated from different SAR tracks, reaching a precision of less than 1.3 cm/a. Two-dimensional time series over the Yellow River Delta (YRD) from 2017 to 2019 are revealed by integrating time series InSAR measurements from both descending and ascending tracks. Land subsidence zones are mainly concentrated on the YRD. In total, twelve typical localized subsidence zones are identified in the cities of Dongying (up to 290 mm/a; brine and groundwater exploitation for industrial usage), Weifang (up to 170 mm/a; brine exploitation for industrial usage), Qingdao (up to 70 mm/a; aquaculture and land reclamation), Yantai (up to 50 mm/a; land reclamation) and Rizhao (up to 60 mm/a; land reclamation). The causal factors of localized ground deformation are discussed, encompassing groundwater and brine exploitation, aquaculture and land reclamation. Multi-scale surveys of spatiotemporal deformation evolution and mechanism analysis are critical to make decisions on underground fluid exploitation and land reclamation.

Urban coastal area subsidence monitoring and analysis using SBAS-InSAR method: a case study of the Qingdao west coast new area

“…Three regions, including the Qingdao Sunac Victoria Bay residential area and its surrounding area (Area A), the area near the Qingdao Metro Line 1 Xingangshan Road Station (Area B), and the Xingguang Island and its western area (Area C), are selected for analysis in the West Coast New Area developed area. The maximum subsidence occurs in the A area, with a maximum subsidence rate of about 63.7 mm/y and a maximum accumulated subsidence of 190 mm, which is consistent with the subsidence areas and subsidence rates obtained by Peng [14] and Li [ [13]. The maximum subsidence rate in the B area is about 42 mm/y, which is consistent with the subsidence area distribution obtained by Li Hongmei et al [24] in the Qingdao Metro Line 1 West Coast New Area section from 2018 to 2020, but with a slightly smaller deformation rate.…”

“…With the rapid development of Synthetic Aperture Radar Interferometry (InSAR) technology, it has become widely used in large-scale land subsidence monitoring. Many researchers have employed time-series InSAR technology to study land subsidence [12][13][14][15]. In recent years, it is necessary to monitor the situation since a certain degree of land subsidence has been occurred by land reclamation activities in the Qingdao West Coast New Area.…”

Monitoring Subsidence Deformation of Suzhou Subway Using InSAR Timeseries Analysis

“…For the shallow subway tunnel, the original stress in surrounding soil layer is re-disturbed due to the construction of subway, which generates soil movement and internal deformation. While in the process of tunnel excavation, the surface subsidence will be produced by the change of soil volume and re-distribution of stress state of overlying soil [42], [43]. The Peck curve is proposed based on the analysis of a large number of tunnel excavation subsidence data, and this model relates surface subsidence to the first-order parameters of tunnel excavation.…”

Monitoring of land subsidence by combining small baseline subset interferometric synthetic aperture radar and generic atmospheric correction online service in Qingdao City, China

“…Hou et al 27 used SBAS InSAR and TerraSAR-X SAR data from 2014 to 2015, and ALOS PALSAR data from 2008 to 2009 to monitor and analyze urban land subsidence on the west coast of Qingdao. Furthermore, Peng et al 28 used multidimensional SBAS InSAR, multitrack Sentinel-1A/B, and RADARSAT-2 satellite images to derive the spatiotemporal evolution of land subsidence in the entire Shandong Peninsula from 2012 to 2019. Tao et al 29 used SBAS InSAR and Sentinel-1 SAR data to monitor and analyze the spatiotemporal distribution and evolution of land subsidence along the Qingdao Metro Line 13 from 2018 to 2019.…”

“…Researchers have studied urban land subsidence in Qingdao using leveling, global positioning system (GPS), and time series InSAR 24 – 29 Of these, leveling and GPS can only obtain land subsidence information of “limited points,” thus, making it difficult to reveal the specific and vivid spatiotemporal evolution of land subsidence over a large scale and long time series 30 – 32 Compared to GPS and leveling, time series InSAR has the advantages of wide coverage, low cost, and high spatiotemporal continuity owing to its all-weather and large-scale monitoring 33 .…”