Numerical simulation of contamination of soils at floods of liquid hydrocarbon

Tlae $reat& damage to a nature, cdling degradation of soils is put by emergencies on firm's oil and gas dbmch. Thus main contaminants are the liquids (petroleum hydrocarbon, salinity layer of water, chemical reagent, chisel soluticms). The chemical contamination of soil negatively infliretlm its physicaI, chemical, and ion exchange of property and biolagical activity. Therefore forecast of possible distribution of contamination by petroleum and the influence of contaminants on a natural medium gains the important value. The purpose of activity was the study of processes of migration and dissipation of liquid hydrocarbon in various grounds at different parameters of a medium. The process of penetration in soil of a layer of liquid hydrocarbon, spill on a surface of ground, concerns to the poorly investigated non-linear tasks of a filtration with incomplete saturation. In activity is considered the approximation to real process the two-dimensional model of an absorption of hydrocarbon in a "dry" ground is capillary gravitational, in view of finding in pores of air. System of differential equations of a two-phase filtration has a kind [l]: *