Abstract
Summary Purpose of the work was to study the geological and geomorphological conditions of the Velykyi Kuyalnyk River (VKR) catchment and the features of its channel depositions’ lithological structure. Methodology. The ArcGIS, Global Mapper, MATLAB and statistical software were used to process and analyze topographic, geological, geotechnical and hydrogeological data and lithological structure of the riverbed. Results. An elevation model on a scale of 1:25000 was built and used for development of a set of maps (horizontal relief ruggedness, geological and geomorphological conditions, etc.). Relief ruggedness indices in the catchment correspond to changes in the regional features of geological structure and rock material composition. They also determine the conditions for the precipitation flow and river feeding with groundwater, erosional rock destruction, sediments transit and accumulation in the riverbed. Cyclical nature of the processes of dispersed material accumulation is well expressed in the lithological structure of the riverbed sediments (changes in composition, thickness in depth and along the channel). Conclusions. Making decisions on implementation of the measures to restore the optimal ecological state and water supply for the VKR, the main regularities of lithological structure variability and filtration properties of channel sediments should be taken into account.
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