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《Acta Scientiarum Naturalium Universitatis Pekinensis》 2017-05
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Research on Geomorphological Morphology and Regionalization of Hoh Xil Based on Digital Elevation Model(DEM)

XU Li;LI Jianghai;LIU Chiheng;CUI Xin;The Key Laboratory of Orogenic Belts and Crustal Evolution (MOE), School of Earth and Space Sciences, Peking University;Institute of Oil and Gas, Peking University;  
The geomorphological morphology was analyzed quantificationally and the geomorphological regionalization was studied detailedly based on Digital Elevation Model(DEM) of Hoh Xil area combinated with platform of Geographic Information System(GIS). Research suggests that the Hoh Xil area composes of three types in terms of absolute altitude: the middle, the high and the highest, and the high altitude type makes up about 69.38%. Due to the formation of planation surface, the relief amplitude in this area is less than 200 m mainly included plain, tableland and hill. Rivers headward erosion caused by strong uplift of Qinghai-Tibet plateau was not exert an influence on the Hoh Xil except Sanjiangyuan region. So the primary compose of slope type are micro slope, slow slope and slope which all less than 15°. According to regional differentiation of the essential geomorphological types and their genesis, the Hoh Xil is divided into four major geomorphological regions: the Qiangtang plateau(Region Ⅰ), the east Kunlun mountains(Region Ⅱ), Sanjiangyuan hill mountains(Region Ⅲ) and Qaidam plateau and basins(Region Ⅳ). Moreover, the Region Ⅰ is divided into Hoh Xil plateau lake basin(SubregionⅠ_1) and Dangla high mountains(SubregionⅠ_2). The Region Ⅱ is divided into southern highest mountain(Subregion Ⅱ_1) and northern high mountains(Subregion Ⅱ_2). The morphology research which reflect altitude, relief and slope and regionalization research which show geomorphological pattern and horizontal differentiation of plateau, mountain land, mountain plateau and basin will be of great significance in geomorphic, landform type and exploitation, protection in Hoh Xil.
【Fund】: 国家重点研发计划(2016YFC0503301);; 国家科技重大专项(2016ZX05033002-007)资助
【CateGory Index】: P931
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