Geoinformation analysis of the relief of the Sarpinsky lakes Catchment area

The calculated characteristics of the relief of the Sarpinsky Lakes make it possible to establish the likelihood of land degradation from the effects of water erosion for planning and carrying out anti-erosion protection of agricultural landscapes.

Abstract Introduction. The high proportion of agricultural landscapes and the active manifestation of degradation processes actualize the need to assess the landscape and ecological conditions of agricultural lands in the northern part of the Ergeninsky upland. Relief is the most important factor influencing erosion-hydrological processes, soil losses, and productivity of agrocenoses. The assessment of relief indicators with pronounced landscape heterogeneity of the region will contribute to the planning and design of sustainable erosively safe agroforestry landscapes and the preservation of soil fertility of agricultural lands.

Object. The object of research is the catchment basin of the Sarpinsky Lakes.

Materials and methods. Within the boundaries of the northern part of the Ergeninsky upland, the Sarpinsky Lakes catchment area of 214.3 thousand hectares, occupying 25% of the research region territory was allocated. The novelty of the study was the use of geoinformation mapping of the relief based on photogrammetric analysis of catchment areas satellite images. To study the geomorphological characteristics of the territory, Landsat 8, 9 satellite survey data and SRTM 3 data were used.

Results and conclusions. The catchment basin of the Sarpinsky Lakes does not have significant permanent watercourses. The average steepness of the slopes is 1,40°, the maximum angles reach 12°. Territories with a height range from 60 to 80 m occupy about 19% of the catchment area, 80-100 m – 22%, 100-120 m – 27%. About 70% of the catchment area has a slope steepness of up to 1°, surfaces with a steepness of 1-2° occupy 23.2% of the area, 2-30° – about 5%. The northern exposure slopes occupy 42.4% of the catchment area, the southern – 25.4%, the eastern – 23.9%, and the western – 8.3%. An assessment of the economic development of these lands is given. An assessment of the economic development of these lands is given. Electronic thematic maps of elevations, slope angles and slope exposures allowing for design work on forest reclamation of agricultural landscapes have been developed. The use of remote sensing data and geoinformation technologies makes it possible to assess the current state of components and to carry out thematic mapping. As a result, the efficiency of planning and designing sustainable and productive agroforestry landscapes and anti-erosion forest reclamation of catchment areas increases.

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