| Popis: |
Upper groundwater level (verhovodka) is considered as one of the factors of soil waterlogging associated with both the natural features of the territory and anthropogenic impact. On the case of one of the watershed areas of the steppe, where many years of scientific research are being conducted to assess the minimization of agrotechnical methods of cultivation of agricultural crops, a soil-geomorphological profile 1 km long was studied on which 8 wells were drilled, to a depth of groundwater with water sampling for salinity and chemical composition. The results showed that there are no visual signs of gleying in the profile of chernozems, the groundwater level correlates with the daytime surface of the relief, and in the soil-ground layer at depths of 2.0-3.9 m there is a horizon of "chocolate" clay, which forms a local aquiclude. Sulphate-sodium composition of fresh waters potentially dangerous for the salinization of chernozems at a high level of GWL (ground water level). Verhovodka is important to desalinating groundwater located above the confining layer, playing the role of a local factor of desalinization of the soil-ground layer of sediments.Since 2009, in the Kamennaya Steppe, according to the data of the main hydrogeological well No. 1, the GWL is constantly at a depth of over 7 m, which characterizes the beginning of the next natural-anthropogenic aridization. In conditions of a lack of surface moisture, no-till techniques should be recommended as a factor in reducing evaporation and moisture accumulation in the steppe chernozems. |
