Article
Environmental Sciences
Lichuan Zou, Chao Wang, Yixian Tang, Bo Zhang, Hong Zhang, Longkai Dong
Summary: With global warming, the degradation of permafrost is causing various issues including thawing subsidence, collapse, and emission of greenhouse gases. Monitoring the permafrost status in the Qinghai-Tibet Plateau is significant for global change and local development. Using satellite data, this study assessed the spatial and temporal permafrost deformation in the northern QTP and found that subsidence is concentrated in braided stream plains and thermokarst lakes. The research also highlighted the sensitivity of L-band ALOS-2 in detecting thermal collapse of permafrost.
Article
Environmental Sciences
Mamoru Ishikawa, Ram Avtar, Shixin Mo
Summary: This study used interferometric synthetic aperture RADAR (InSAR) technique to detect topographic deformation related to the irreversible changes in ground ice. The overall deformation of the ground surface was found to be in the range of -3 to 3 cm, mainly influenced by thawing and growing ground ice.
LAND DEGRADATION & DEVELOPMENT
(2023)
Article
Geosciences, Multidisciplinary
Yuji Himematsu, Yosuke Aoki, Taku Ozawa
Summary: This study used synthetic aperture radar (SAR) data to analyze the ground deformation at Miyakejima volcano and identified asymmetric collapse patterns. It was found that continuous brittle failures induced by hydrothermal alterations were responsible for the ongoing collapse.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Geochemistry & Geophysics
Lianjing Zheng, Qing Wang, Zeyu Wang, Fengyan Wang, Chen Cao
Summary: This study aims to reveal the long-term temporal and spatial evolution of land subsidence characteristics driven by groundwater and oil extraction, as well as the formation mechanism and seasonal response law under different driving factors. The study found that subsidence is mainly caused by pumping groundwater and oil, with significant seasonal variation.
Article
Geosciences, Multidisciplinary
Yoshihiro Iijima, Takahiro Abe, Hitoshi Saito, Mathias Ulrich, Alexander N. Fedorov, Nikolay I. Basharin, Alexey N. Gorokhov, Victor S. Makarov
Summary: Thermokarst is causing extensive landscape changes and surface subsidence in Central Yakutia. The study used GIS and remote sensing to analyze the spatial extent and rate of subsidence, revealing activated surface subsidence of about 2 cm/year in disturbed areas. Some historically deforested areas have likely recovered without further thermokarst development.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Environmental Sciences
Feifei Qu, Zhong Lu, Jinwoo Kim, Michael J. Turco
Summary: By utilizing multi-temporal interferometric synthetic aperture (InSAR) techniques, a deformation map covering 500,000 km2 of the Gulf Coast (GC) has been constructed, revealing 30 subsidence patterns and 14 uplift features. The land deformation in GC is influenced by both regional geological conditions and human activities, such as petroleum reservoir depressurization and aquifer compaction. Other processes, including wastewater injection, sulfur/salt mining, dewatering, oxidation, and construction work, also contribute to ground instability.
REMOTE SENSING OF ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Ryosuke Doke, Kazutaka Mannen, Kazuhiro Itadera
Summary: A study using satellite data analyzed the deformation of Owakudani after a phreatic eruption, finding that the central cones of the volcano have subsided, possibly due to compaction caused by a decrease in pore pressure from rupture and fluid migration.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Shuai Yang, Jinmin Zhang, Lei Fu, Chunhua Chen, Zijing Liu, Wenlong Zhang
Summary: Due to the complex terrain, intense tectonic activity, and harsh climate in the Qinling-Daba Mountains, landslides pose a serious threat to local residents. InSAR has been widely used for landslide detection, but its effectiveness is challenged by the steep terrain and dense vegetation in the area. This study compared ALOS/PALSAR-2 and Sentinel-1A data for landslide detection and found that ALOS/PALSAR-2 is more suitable for detecting landslides in areas with high vegetation coverage, meeting over 90% of the monitoring needs. The study provides important scientific support for future landslide monitoring in the area and the accuracy evaluation methods of InSAR monitoring.
APPLIED SCIENCES-BASEL
(2023)
Article
Geochemistry & Geophysics
Xiangteng Wang, Chunlei Fu, Wangwang Gu, Chaoling Xie, Zhenan Yao, Shuzhong Sheng, Xiao Tian, Zhonghao Deng
Summary: Guizhou province in China is prone to moderate earthquakes, especially extremely shallow earthquakes that can cause damage to infrastructure. Accurate focal depth and moment tensor information is crucial for earthquake disaster assessment and karst collapse monitoring in karst areas. However, the sparse network and complex velocity structure in the study area can introduce errors in the inversion of focal depth and mechanisms for shallow earthquakes. This study used surface-wave information from regional stations to infer the shallow velocity structure and obtained the focal depth and mechanism of a 4.5 magnitude earthquake in Guizhou province.
SEISMOLOGICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Katarina Pukanska, Karol Bartos, Matus Bakon, Juraj Papco, Lukas Kubica, Jan Barlak, Martin Rovnak, Lubomir Ksenak, Martina Zelenakova, Ihor Savchyn, Daniele Perissin
Summary: Salt mines, especially abandoned ones, pose a threat to populated areas, infrastructure and the natural environment. This study focuses on the monitoring and evaluation of the active deformation zone over the Solotvyno salt mine using satellite radar data, optical satellite imagery, and in-situ UAV photogrammetry. The results show significant subsidence tendencies and the emergence of new sinkholes in the monitored area, highlighting the need for a high-precision permanent monitoring system.
FRONTIERS IN EARTH SCIENCE
(2023)
Proceedings Paper
Engineering, Aerospace
Ryu Sugimoto, Masanobu Shimada, Yu Morishita, Ryo Natsuaki, Ryosuke Nakamura, Chiaki Tsutsumi, Yoshio Yamaguchi
Summary: Sustainable monitoring of ground deformation is crucial in areas prone to natural disasters. Space-borne Interferometric Synthetic Aperture Radar (InSAR) technology has been pivotal in global surface deformation monitoring. The Japanese L-band SAR, ALOS/PALSAR, has collected a significant amount of interferometric data which can be used for producing interferograms to study ground deformation on a continental scale. The derived interferograms can provide high accuracy in investigating the velocity and time series of deformation, and will be made freely accessible through a website in the future.
2021 7TH ASIA-PACIFIC CONFERENCE ON SYNTHETIC APERTURE RADAR (APSAR)
(2021)
Article
Engineering, Civil
Kuswaji Dwi Priyono, Aditya Saifuddin, Ferman Setia Nugroho, Jumadi Jumadi
Summary: This paper compares the ability of ALOS/PALSAR and Landsat satellite images to monitor the dynamic changes in mangrove areas. The results show slightly varied change detection results between the two images, with Landsat imaging classification having better accuracy in distinguishing mangroves from non-mangroves and PALSAR image classification being more consistent in area calculation. However, there are limitations in separating mangroves and non-mangroves near water bodies.
INTERNATIONAL JOURNAL OF GEOMATE
(2022)