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Application of remote sensing in the description of fluvial system in dryland:A case study of Golmud distributive fluvial system,Qaidam Basin,NW China

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Journal of Palaeogeography 2022年第4期11卷 601-617页

作者： Xiang-Hui Zhang Chang-Min Zhang Wen-Jie Feng Rui Zhu Qing-Hai Xu School of Geosciences Yangtze UniversityWuhan430100Hubei ProvinceChina

distributive fluvial systems(DFS)are widespread in drylands in the northwestern *** differences in fluvial morphology in drylands is beneficial for studying ancient rock records and the extraterrestrial surface *** remote sensing image,characterized by real-time and possibility of repeated observations,is a vital tool for recording and comparing fluvial systems in *** remote sensing technology is a method of investigating fluvial *** to the limited accuracy of satellite imagery,there are few reports on the detailed description of the fluvial system in drylands of NW *** analyze the pattern of fluvial morphology changes in the Golmud distributive fluvial system(DFS)in the Qaidam Basin,northwestern China,using satellite remote sensing and unmanned aerial vehicles(UAV).Firstly,we use Google Earth real-time image data,historical image data,and radar digital elevation data to extract geomorphological information;then the UAV remote sensing image data were used to interpret fluvial network information;finally,we use the gray-scale differential vector method to describe the fluvial *** zones have been identified in the Golmud DFS:the proximal,the medial,and the distal,by comparing the differences in topographic and geomorphic characteristics,fluvial morphologies,and sedimentary characteristics of the Golmud *** proximal slope is higher than the other two zones,and the geomorphic features are mainly gravel *** proximal fluvial morphologies are mainly large braided rivers,and sediments are more gravelly and less *** medial slope is relatively small,and the geomorphic features are mostly oasis *** medial fluvial morphologies are mainly meandering rivers associating with braided rivers,and sediments are more sandy and less *** distal slope is the lowest,and the geomorphic features are mostly oasis plains,lakes,and marsh *** distal fluvial morphologies are mainly meande

关键词： Qaidam basin Remote sensing UAV distributive fluvial system fluvial morphology Dryland fluvial systems

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Analysis of the Sedimentary Characteristics of a Modern distributive fluvial system:A Case Study of the Great Halten River in the Sugan Lake Basin,Qinghai,China

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Journal of Earth Science 2023年第4期34卷 1249-1262页

作者： Xianghui Zhang Changmin Zhang Adrian Hartley Qinghai Xu Wenjie Feng Taiju Yin Rui Zhu School of Geosciences Yangtze UniversityWuhan 430100China Department of Geology and Petroleum Geology School of GeosciencesUniversity of AberdeenAberdeen AB243UEUK

Understanding controls on river planform changes can help to build predictive models for distributive fluvial systems,and then guide the oil and gas *** do this we have undertaken a detailed investigation of the modern Great Halten River distributive fluvial system from the Sugan Lake Basin,Qinghai,*** aerial vehicle(UAV) photography,satellite remote sensing data and elemental analysis were used to determine differences in the sedimentary characteristics of the distributive fluvial *** the apex to the toe,the changes in the slope,river morphology,sedimentary characteristics and element content in different regions were determined and three facies belts:“proximal”,“medial” and “distal” were *** found that the sedimentary structure and elemental content characteristics of each facies differ *** compare the large-scale evolution of rivers from braided to meandering rivers,and the fine description of sedimentary characteristics in combination with each observation,we strengthen our overall understanding of the modern DFS from macro to micro *** the same time,we summarize the sedimentation model of the Great Halten River DFS,and our study provides a reference for establishing the sedimentary model in continental petroliferous basins.

关键词： Sugan Lake Basin distributive fluvial system river morphology sedimentary model sedimentary structure sedimentology.

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