L.G. Smirnova1, A.G. Narozhnyaya2, A.A. Kozhushkov2
1Belgorod Research Institute of Agriculture, ul. Oktyabrskaya, 58, Belgorod, 308001, Russian Federation
2Belgorod State National Research University, ul. Pobedy, 85, Belgorod, 308015, Russian Federation
Summary. The aim of the study was to carry out the typing of the territory of Belgorod region using river basin approach to assess erosion risk and form the spatial data on morphometric parameters of the relief. The typing was performed in geoinformation environment of ArcGIS using the methods of geomodeling and geostatistics, laid in the ArcGIS 10.1 and in the STATISTICA 6.0 program. The allocation of basins, determination of morphometric parameters of the relief were carried out at the topographic map of Belgorod region M: 1:200 000 with a cross section of horizontals is 20 m. With the data of Shuttle Radar Topography Mission we highlighted the erosion network, set the boundaries of the basins of the IV order, carried out morphometric analysis of the relief, calculated the value of relief factor by Morgan. The study resulted in allocation of 207 catchment basins, which were combined into 5 types with the help of cluster analysis. The first type includes 49 water catchments with the area 4193 km2. The average relief function is 2.15, the slope gradient is 5.6 degrees. The second type unites the greatest number of watersheds: 68 polygons, and occupies 7821 km2. The values of the steepness of the slopes are 3.4-4.4 degrees, the relief function ranges from 1.1 to 2.2. In the III type 47 basin structures are contained with a total area of 8758 km2. The values of the relief function on the average are 1.56, the steepness of the slopes–3.1-4.8 degrees. The IV type consists of 31 catchment basins with the area 5251.2 km2. The values of the relief function are 0.8-1.3. The slope ratio varies from 2.1 to 3.5 degrees. The average length of the slope is 371.8 m. The fifth type includes 12 polygons and occupies 1094 km2. It is characterized by low values of slope gradient (0.1-2.8 degrees) with medium and high lengths (397-745 m). The values of the relief function are minimal (on the average they are 0.85). The application of the methods of digital geomodeling and statistical analysis enabled to generate spatial data on the morphometric characteristics of the relief, and to obtain quantitative indicators for assessing erosion potential of the area.
Keywords: morphometric characteristics of relief, digital design of relief, river basin.
Author Details: L.G. Smirnova, D. Sc. (Biol.), head of laboratory (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); A.G. Narozhnyaya, Cand. Sc. (Geogr.), assoc. prof.; A.A. Kozhushkov, post-graduate student.
For citation: Smirnova L.G., Narozhnyaya A.G., Kozhushkov A.A. Typification of Watersheds of Belgorod region on the Morphometric Characteristics of the Relief for the Evaluation of Erosional Danger at the Regional Level. Dostizheniya nauki i tekhniki APK. 2015. Vol. 29. No 11. Pp. 66-69 (in Russ.).