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Research of the Differential Uplifting in the Palongzangbu Region Based on the Synthesis of the Watershed Index and Seismic Data
Wang Lin,Zhao Yan,Tian Qinjian,Li Wenqiao,Xu Yueren
作者单位
Wang Lin Key Laboratory of Earthquake Prediction, Institute of Earthquake Forecasting, CEA, Beijing 100036, China 
Zhao Yan Key Laboratory of Earthquake Prediction, Institute of Earthquake Forecasting, CEA, Beijing 100036, China 
Tian Qinjian Key Laboratory of Earthquake Prediction, Institute of Earthquake Forecasting, CEA, Beijing 100036, China 
Li Wenqiao Key Laboratory of Earthquake Prediction, Institute of Earthquake Forecasting, CEA, Beijing 100036, China 
Xu Yueren Key Laboratory of Earthquake Prediction, Institute of Earthquake Forecasting, CEA, Beijing 100036, China 
摘要:
Research on the differential uplifting in the Palongzangbu region is crucial to understanding the tectonic deformation mechanism and establishing the model of the faulted blocks in the region of the east structural knot. In this paper, based on the ASTER-30m DEM, we calculate the hypsometry index (HI) of 19 watersheds in the Palongzangbu region, and study the differential uplifting in this region combining with seismic data, the ground deposition and erosion process. The result shows that the spatial distribution of the HI value can reflect the differential uplifting in the study area. Differential uplifting exists within different zones, and there are 2 relative strong uplifting centers. One center is near the east structural knot, and the other lies between the Lhari fault and Nujiang fault at their converging segment. Also, the watershed evolution, seismic activity, and ground deposition and erosion process are closely related to each other, and they constitute a chain of evidence which reveals the whole process from the tectonic movement underground to the landform evolution on the surface.
关键词:  Watershed  Hypsometry Index  GIS  DEM  Differential Tectonic Uplifting  East Structural Knot
DOI:
分类号:
基金项目:This project was sponsored by the Study on Regional Tectonically Quiet of Lower Reaches of the Yarlung Zangbo River (A04-2015-003).
Research of the Differential Uplifting in the Palongzangbu Region Based on the Synthesis of the Watershed Index and Seismic Data
Wang Lin,Zhao Yan,Tian Qinjian,Li Wenqiao,Xu Yueren
Abstract:
Research on the differential uplifting in the Palongzangbu region is crucial to understanding the tectonic deformation mechanism and establishing the model of the faulted blocks in the region of the east structural knot. In this paper, based on the ASTER-30m DEM, we calculate the hypsometry index (HI) of 19 watersheds in the Palongzangbu region, and study the differential uplifting in this region combining with seismic data, the ground deposition and erosion process. The result shows that the spatial distribution of the HI value can reflect the differential uplifting in the study area. Differential uplifting exists within different zones, and there are 2 relative strong uplifting centers. One center is near the east structural knot, and the other lies between the Lhari fault and Nujiang fault at their converging segment. Also, the watershed evolution, seismic activity, and ground deposition and erosion process are closely related to each other, and they constitute a chain of evidence which reveals the whole process from the tectonic movement underground to the landform evolution on the surface.
Key words:  Watershed  Hypsometry Index  GIS  DEM  Differential Tectonic Uplifting  East Structural Knot