Abstract
The Bolshezemelskaya tundra is one of the least studied and poorly mapped territories of the European North-East of Russia. The availability of the ArcticDEM digital elevation model with a high spatial resolution allowed conducting a comprehensive joint analysis of digital, geomorphological and geological data.
 The results of using the ArcticDEM global digital relief model for geological and geomorphological studies of the Seyda River basin (eastern Bolshezemelskaya tundra) in its middle and lower reaches are presented.
 An irregular triangulation network TIN covering the Seyda River valley was constructed, and the main geomorphometric parameters of the relief were calculated: hypsometric characteristics, surface inclination angles and slope exposures. Based on the obtained morphometric indicators of the relief and the textural and structural characteristics of Quaternary sediments, the following types of relief were identified: accumulative glacial, erosion-accumulative water-glacial and erosion-accumulative alluvial types of relief. A geological and geomorphological diagram of the Seyda River valley was been constructed and the main morphogenetic features of the relief during its formation were identified.
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