Monitoring land subsidence and fault deformation using the small baseline subset InSAR technique: A case study in the Datong Basin,China |
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| Institution: | 1. Natural Resources Canada, 588 Booth Street, Ottawa, ON K1A0Y7, Canada;2. European Center for Geodynamics and Seismology, Rue Josy Welter 19, L-7256 Walferdange, Luxembourg;3. National Museum of Natural History, Dept. Geophysics/Astrophysics, Rue Josy Welter 19, L-7256 Walferdange, Luxembourg;4. Department of Earth Sciences, Western University, Biological and Geological Sciences Building, 1151 Richmond Street, London, ON, N6A5B7, Canada;5. Department of Earth Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5R1S6, Canada;1. School of Geosciences and Info-Physics, Central South University, Changsha 410083, Hunan, China;2. Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China |
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| Abstract: | The Datong Basin is located to the north of the Fenwei Graben Basin, where ground fissures and subsidence are common geological hazards. The Datong Basin is also one of China's main energy bases and is known as “the hometown of coal”. In this study, the small baseline subset InSAR technique was used to process 40 scenes of Envisat ASAR images that cover this area. The magnitude and distribution of subsidence in the Datong Basin were obtained. Additionally, the relationships among the regional land subsidence, ground fissures and fault activity were addressed. The results reveal that Datong ground subsidence is affected by the groundwater exploitation and the nearby faults. The Datong ground fissures are controlled by regional fault activity (e.g., seismic activity) and its interaction with the ground subsidence. Meanwhile, the influence of surface precipitation on ground fissure activity was analyzed. The differential subsidence on both sides of the ground fissures was also studied. |
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| Keywords: | Ground subsidence Ground fissures SBAS-InSAR Datong Groundwater Fault activity |
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