SOME MORPHOLOGICAL FEATURES OF THE EOLIAN-ALLUVIAL SANDS OF THE INDUSTRIAL SITE AT THE ZAPORIZHZHIA NPP

Problem statement. The authors used a complex index of soil morphology in the research, with regard to the shape and character of grain surface in the entire volume of sands under research. A morphological assessment was carried out for the entire volume of the studied sandy soil. An important factor in the formation of the shape and character on the sand grains surface is the mineral composition of the sand. Quartz was the predominant mineral in most of the studied sands. Further research involves studying other mineral differences. This will provide data on the formation of contacts between sand grains, which are different from spheres and can be plate-like shape or other shapes. For the first time, the main morphological characteristics of eolian-alluvial and alluvial quaternary sands in the Dnipro Valley were obtained for the industrial site at the Zaporizhzhia NPP in Enerhodar City. Moreover, it was for the first time in a vertical section of the sand mass. One can note the identified decrease in the morphology index in the river sands of the Dnipro Valley from the sources to the mouth. Numerous values about the morphology indices of sands at the NPP site were obtained. Criteria for separating eolian and eolian-alluvial sands in the section were also proposed. Purpose of the article. Obtaining data on the morphology of eolian-alluvial and alluvial sands for the industrial site at the Zaporizhzhia Nuclear Power Plant (NPP) in Enerhodar City, which is missing. Or more precisely, obtaining reliable quantitative indices that can be used in calculations of soil foundations. Conclusions and results. This paper presents the results of determining the morphology index for the industrial site at the Zaporizhzhia NPP in Enerhodar City. It also presents studying the shape and character of the sand grains surface of alluvium for the vitachevo-bug horizon of the first supra-floodplain terrace in the Dnipro Valley in this area. Additionally, the results of similar works on the study of genetic types of Quaternary sands of the different genesis for the Dnipo Valley were analyzed. As a result of the research, data were obtained on the morphology of monomineralic oligomictic alluvial sands, their shape, and the character of the sand grains surface. The results of the research can be implemented into the subgrade soils of NPP buildings and structures. Also, they can be applied to calculations for the post-war reconstruction of hydraulic engineering and transport structures at the NPP site – inlet and outlet channels, as well as the dam of the cooling pond.