MORPHOLOGICAL FEATURES OF EOLIAN AND ALLUVIAL SANDS OF ENERGODAR CITY

Problem statement. The assumption that the properties of sandy soils, in addition to other factors, can also be influenced by the morphological features of the sands of eolian and alluvial genesis, appeared during the analysis of data from high-precision geodetic observations of subsidence and tilting of buildings and structures in the area Energodar. Data from engineering studies also deserve attention. To the greatest extent, the change in the properties of sandy soils is important for the artificial surface structures of the industrial zone and the city itself, namely: retaining walls, so-called light yards of power units and Zaporizhzhya SDPS, transmission line supports, etc. This article is devoted to the solution of the issues that arose earlier, regarding the possible causes of uncontrolled and until now subsidence of individual buildings and structures of the industrial zone, as well as city buildings. The purpose of the article. Obtaining during the research some missing data on the morphology of eolian and alluvial sands within the city of Energodar, in particular, reliable quantitative indicators that can be used in the calculations of soil bases. Conclusions. The results of the soil morphology indicator determination, as well as the study of the shape and nature of the sand grains surface for alluvium of the Vitachevo-Buzka horizon of the 1st floodplain terrace of the Dnipro River valley within the city of Energodar are presented. The results of similar works on the study of genetic types of Quaternary sands of different genesis in the Dnipro River valley were also analyzed. Thanks to the research, data were obtained on the morphology of monomineral oligomictic alluvial sands, their shape and the nature of the sand grains surface of alluvium. Since quartz was the predominant mineral in most of the studied sands, in further studies it is planned to study other mineral differences, which would allow obtaining data on the formation of contacts between sand grains, the shape of which is different from a sphere, lamellar or other shape. For the first time, some basic morphological characteristics of the eolian and alluvial Quaternary sands of the Dnipro valley in Energodar were obtained. Attention is paid to the clarification of the concept of eolian deposits, the determination of their formation age is problematic. The trend of decreasing morphology of river sands of the Dnipro valley from its sources to its mouth is determined. With all confidence, the results of the research can be applied to the foundations of buildings in Energodar.