Submodel geological

First of all are determined physicochemical processes enabling the solution of the set problem and are selected those laws of thermodynamics and kinetics or known empiric correlations, which formalize them and set sought for final data in correlation with available initial data in the studied system. Chemical processes in the geological medium are mutually associated by strict restrictions of charge neutrality, mass and energy conservation. Structurization of models in these conditions boils down to identification of cause and effect associations between various physicochemical processes and in the selection or derivation of equations describing them. Such structurization is intended for the creation of a system of interrelated equations, which characterize the physicochemical state of groimd water and may be considered as an independent physicochemical submodel. 

Among the outside factors the main role belongs to geological ones. They include the composition, properties and mutual position of deposits and rocks, their hydrogeological stratification. They affect ground water hydrodynamics but practically do not depend on it. In connection with this the geologic structure and properties of the host rocks may be considered an independent stationary submodel of the geologic structure... 

The geological submodel is a structural one as it determines spatial position of boundaries most important for modeling. They separate deposits and rock from each other, from the atmosphere, surface water. Such boxmdaries have rigid space coordinates and actually do not change their position in time. Parameters of this submodel characterize the composition of host deposits and rocks, porosity and permeability properties. A geological submodel may be constructed in coordinates x, y and 2 and graphically imaged in the forms of maps and vertical cross-sections. 

The content and interrelation of the above submodels determine the structure of the hydrogeochemical model as a whole the first one determines the substance of the hydrogeochemical model, the second and third, its conditions. At that, the hydro-geodynamical submodel characterizes variable conditions associated with ground water flow, the geological submodel characterizes unchangeable conditions in the forecast area. The content and interrelation of two former submodels determine the type of hydrogeochemical model as a whole. 

These models actually study kinetics of the mass transfer in conditions of the geological and hydro-geodynamic submodels. Thereby they accept chemical equilibrium only for homogenous reactions in water and ion exchange. Mass transfer between media is stretched in time, and values... 

The geological submodel includes additional parameters, which do not change with time and characterize the structure, properties and composition of the geological medium, namely ... 

Parameters of the hydro-geodynamic submodel, as opposed to the geological, may change in time of the computation experiment as function space and time coordinates. 

---