On the issue of improving hydrogeological stratification

Abstract

Introduction: the main criteria and problematic aspects of modern hydrogeological stratification of sections of the artesian basins are considered.

Methodology: analytical evaluation of hydrogeological terms, concepts and definitions.

Results and discussion: the use of approved taxa of hydrogeological stratification set forth in the instructional materials often causes difficulties in practice. Thus, when conducting regional studies, it is difficult to divide water-retaining sediments into water-retaining and relatively water-retaining sediments, which, as a rule, is caused by the area variability of the head ratio of adjacent aquifers. Also, the proposed stratification does not take into account the nature of change in water content of rocks over the area and in the section, so locally the aquifer has to be referred to as relatively watertight. The contradictory point in this case is that for water supply purposes, by definition, not an aquifer but a relatively water-resistant horizon is used.

Conclusions and recommendations: the current hydrogeological stratification requires further improvement. It lacks clear criteria for distinguishing a relatively water-bearing horizon taxon. At stratification of layered strata represented by alternation of lithological differences with different filtration properties, it is proposed to introduce the name of hydrogeological subdivision – water-retaining locally water-bearing.