Osadchy V. Methodology basics of study of factors and processes of Ukrainian surface water chemical composition forming.

Dissertation is dedicated to elaboration of methodology basics of systemic hydrochemical studies which are based on combination of geographical approaches to investigations of conditions and factors of surface water chemical composition forming with physico-chemical processes of matter transformation in water environment, and to application of proposed methodology for Ukraine surface water. For the first time a new data concerning quantitative assessment of natural and antropogenic factors influence on the chemical composition and water quality for all large river basins of Ukraine has been obtained on the basis of two hydrochemical approaches. Computer informational-analytical system with wide range of user's functions has been developed, adapted and used for real calculations with the aim of storage, processing, transfer, and multipurpose presentation of hydrochemical information. Idea of thermodynamic modeling utilization for study of the processes of Ukraine surface water chemical composition forming (calculations of equilibrium status of hydrochemical systems, identification of chemical substances physico-chemical forms in surface water and pore water of bottom deposits and modeling of their interphase transformations) as well as for the solving of wide spectrum of applied tasks is implemented by the way of complete computer system development.