Geomorphometric analysis of agricultural areas based on the FABDEM digital elevation model

DOI: 10.35595/2414-9179-2024-2-30-252-262

View or download the article (Eng)

About the Authors

Marina G. Erunova

Federal Research Center “Krasnoyarsk Science Center”,
50, Akademgorodok, Krasnoyarsk, 660036, Russia,
E-mail: marina@icm.krasn.ru

Oleg E. Yakubailik

Institute of Computational Modeling Siberian Branch of the Russian Academy of Sciences,
50/44, Akademgorodok, Krasnoyarsk, 660036, Russia,
E-mail: oleg@icm.krasn.ru

Abstract

The application of geoinformation technologies and digital elevation models (DEMs) makes it possible to significantly automate the process of analyzing the terrain in the area under study. Modern DEMs are based on remote sensing data, and their accuracy is constantly improving. Based on new non-profit FABDEM DEM data and the SAGA GIS functionality, a geomorphometric analysis of the topography in the agricultural area of the experimental production farm (EPF) “Mikhailovskoye” was carried out at the Krasnoyarsk Science Center of the Russian Academy of Sciences. For the farm area, a series of large-scale thematic maps was constructed, including slope steepness and aspect, plan and profile curvatures, Terrain Ruggedness Index (TRI), Slope Length and Steepness Factor (LS-factor), Topographic Wetness Index (TWI), etc. A model of surface runoff was also built. The morphometric analysis of the area of EPF “Mikhailovskoye” shows that, despite its small size, the surface structure is heterogeneous. The analysis shows that 85 % of the farm area is flat land, while the remaining 15 % is located on more elevated local landforms. The steepness of most slopes is up to 3°, accounting for 92 % of the total area, with only 8 % of the land being steeper than 3°. The fields of the farm are dominated by western and eastern slopes, which account for 42 % of the total area, while 36 % of the area is represented by southern slopes, with 2 % represented by northern ones. The results of the analysis of the Topographic Wetness Index (TWI) for the entire farm indicate a low erosion risk: only 0.5 % of the farm land has drainage depressions, with 3 % located on hills. According to the Slope Length and Steepness Factor (LS-factor), the hilly areas are located on the slopes with the steepness higher than 4°.

Keywords

digital terrain modeling, FABDEM, GIS, SAGA GIS, morphometric attributes

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For citation: Erunova M.G., Yakubailik O.E. Geomorphometric analysis of agricultural areas based on the FABDEM digital elevation model. InterCarto. InterGIS. GI support of sustainable development of territories: Proceedings of the International conference. Moscow: MSU, Faculty of Geography, 2024. V. 30. Part 2. P. 252–262. DOI: 10.35595/2414-9179-2024-2-30-252-262