ISTC Creation of 3D Geomigration Model for Unloading Section of Contaminated Groundwaters from the Karachay Lake to the Open Hydrographic Network

Solving of this problem is possible on the basis of numerical simulation of contamination migration process. It is necessary to create 3D geomigration model 
because of complexity of hydrogeological and hydrochemical conditions of this region.     
    
Work package on geomigration model development includes:     
    
1. Collecting and processing of materials on characteristics of contaminated groundwaters sources.     
    
2. Preparation of materials on geological massif characteristics.     
    
3. Development of contaminants propagation physical model.     
    
4. Planning of modeling region.     
    
5. Mathematical formulation.     
    
6. Development of mathematical model for contaminants propagation in unloading section of groundwaters to the Mishelyak river including:     
    
– choice of differential equations digitization method and construction of numerical scheme;    
– software development;    
– carrying out epignose computation;    
– estimation of developed model adequacy to geographical description;    
– model correction.    
Geomigration model development is usually realized in two ways: first – development of mathematical application package which allows to consider the whole 
variety of conditions and processes taking place, second – satiation of the model with hydrogeological and geochemical source information.     
The model must consider all geological, hydrogeological, and hydrochemical features of the region:     
    
– presence of tectonically broken zones with high conductivity;    
– development of porous sediment cover with different lithologic structure and variable power;    
– sharp heterogeneity and conductivity anisotropy of water-bearing rocks;    
– changeability of capacitive properties;    
– time variation of water-bearing horizon infiltration feed;    
– complicated structure of groundwaters flow;    
– density differentiation of groundwaters flow;    
– modification of groundwaters level;    
– difficulty in connection of ground and surface waters;    
– radioactive decay of separate migratory components and delay of main dose-generating radionuclides by rocks (including sorption and desorption processes) 
and so on.