ИСТИНА

Nowadays the areas of layered soils which formation is caused by human activity are increasing. The most massively differentiated profile of soils is formed when remediation is carrying out and in the city conditions when a transition and laying of considerable volumes of soils takes place that initiates formation of sharp boundaries of soil layers. It leads to different functioning of a soil cover and changing of the hydrological regime. However, its experimental determination is connected with a number of methodical difficulties. The method that gives the possibility to identify features and differences in functioning of soils with different structure is using of physically based mathematical models. The aim of our research is the prediction of hydrological regime of layered soils by method of mathematical modeling. The Hydrus-1d model has been used, experimentally determined parameters were: water retention curve, soil density, content of organic substance, particle size distribution. The objects of our research were (1) tundra gley peaty soil of the Russian North located in the Komi Republic which has undergone oil pollution in 1994 and there was held a remediation by replacement of the polluted layer with formation of the soil profile that spread by a heavy sand layer; (2) the layered soil constructions in Moscow that were created from sharply different soil substrata: humic horizon, peat, sand. Modeling of the hydrological regime has shown high probability of formation of the waterlogged layers on the horizon boundaries during the summer period.