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DEM-based Tectonic Geomorphology Study in the Northeastern Margin of Tibetan Plateau

Author: HuYi
Tutor: LiuShaoFeng
School: Chinese Geology University (Beijing)
Course: Resources and Environmental Remote Sensing
Keywords: The northeastern margin of the Qinghai - Tibet Plateau Digital elevation model (DEM) Tectonic geomorphology Low-relief
CLC: P931
Type: Master's thesis
Year: 2008
Downloads: 325
Quote: 1
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Abstract


Control of the Qinghai-Tibet Plateau under different institutional tectonism and climate affect the developmental formed by overthrusting role . Steep peaks, development of terrain small altitude a wide basin plateau , also development characterized by linear Mountains mountain basin consisting of basin-mountain system . About the Tibetan uplift kinematic , kinetic mechanism , as well as the uplift process and the current tectonic deformation has attracted the attention of geologists at home and abroad . In recent years, high altitude mountain uplift mechanism, the study focuses on the crustal evolution of orogenic evolution mode Surface Processes evidence surface process research shift from qualitative to semi-quantitative - quantitative stage . The entry point is the flag carrier of crustal deformation, climate evolution , that is, the surface topography . Digital elevation model (DEM) is the digital representation of the Earth's surface topography and simulation of new ideas and methods , which provide for the study of the topography . The analysis technique based on a digital elevation model (DEM) data space , take advantage of the latest get 90m spatial resolution SRTM DEM data , select the northeastern tip of the Qinghai - Tibet Plateau , the macro-scale quantitative terrain analysis . ARCGIS 9.2 software platform swells by selecting different geomorphological parameters , I became a series of geomorphic analysis of thematic maps such as peak view , with an average elevation map , bottom view , with an average slope map and local topography map and a detailed discussion and analysis . The analysis shows that the performance of the northeastern tip of the Qinghai - Tibet Plateau was stepped low slope , low rolling terrain characteristics . On this basis , the author of the landform parameters contrast, average slope and local topography basic linear relationship could come to describe the surface undulations . The study further found to increase with elevation , terrain slope and topography stepwise increase downcutting influence by water at a relatively low altitude , by glaciation and mechanical weathering control in the alpine regions . In addition , the study area strip with analysis and stratigraphic division that control the low slope of the study area , the low undulating terrain characteristics factors : lithology , sedimentation , erosion , and alpine planation surface .

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CLC: > Astronomy,Earth Sciences > Physical Geography > Department of Physical Geography > Geomorphology ( topography )
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