Keywords: SRTM, relief, erosion, analysis, modeling
// Мелиорация.– 2020. – №3(93) – P 43–54
For the first time, for the territory of the Gorky district of the Mogilev region, according to the hydrologically correct digital elevation model, a complex of cartometric and morphometric calculations was performed, as well as maps of the erosion network from elements of 1-4 orders and the density of horizontal dissection of the relief were constructed. Shuttle Radar Topographic Mission (SRTM) data with a spatial resolution of 1 arc second (30 m) were used as the source data. Comprehensive morphometric analysis of the digital elevation model was performed using the functionality of spatial analysis and hydrology toolkit the ArcGIS version 10.3. The streams of four orders with a total length of 508.21 km were identified during the analysis. At the same time, 54.2% of the total length falls on the first order streams, and 79 % – on the total length of the streams of 1-2 orders. The average length of the streams ranges from 0.59 to 1.91 km, and the distribution of the lengths of different-order streams obeys the inverse exponential law. The ratio of the lengths of the streams ranges from 0.17 to 0.73, reaching a maximum value for second order watercourses. The predominance the streams of 1–2 orders of magnitude indicates the development of water erosion processes within the study area. According to the results of cross-validation, the method of empirical Bayesian kriging turned out to be the most suitable for the purposes of predicting the spatial distribution of the degree of horizontal dissection of the relief. As a result of the application of this method, a surface was obtained with a minimum horizontal fragmentation of the relief of 1.89 km/km2 and a maximum of 3.45 km/km2. The automation model for the process of morphometric analysis of the relief using the functionality of the ModelBuilder ArcGIS application can be used to optimize the process of inter-farm land management and planning of land reclamation measures.