Kalashnikov I. Prediction of the efficiency of methods for soil and underground protection

The object of the research is the process of contamination of zone of aeration and ground waters. The aim of the work is the development of the numerical models for the scientific support of the methods which are used for localization and liquidation of contaminated areas in ground waters and in the aeration zone. Research methods: methods of the study are based on numerical experiments with the mathematical models of filtration and mass transfer. For the numerical integration of the equations the implicit difference schemes of splitting are used. Theoretical and practical results: The developed numerical models have the wide working sphere and can be used as the effective tool for solving problems connected with the ecological safety. These problems include the scientific support of the methods which are used to protect the aeration zone and ground waters from contamination. Scientific novelty: 1. a numerical model is at first worked out for the calculation of neutralization of area of contamination in the zone of aeration using the vertical washing of soil; 2. a numerical model is at first worked out for the calculation of neutralization of area of contamination in the zone of aeration by infiltration of reagent through a well; 3. a numerical model is at first worked out for the calculation of neutralization of area of contamination in ground waters by infiltration of reagent in the underground stream from the zone of aeration; 4. the advanced numerical model of ground waters was developed allowing to calculate the efficiency of several methods of protection of ground waters from contamination, namely: the neutralizator supply to the ground waters through wells, using the drainage wells taking out the pollutant from the stream, the application of wells supplying water to the underground stream and making the hydrodynamic barrier on the way of the flowing contamination, application of continues under ground walls. 5. a new numerical model is worked out for the calculation of efficiency of protection of ground waters from contamination by the use of not continuous underground protective walls. Implementation extent: the developed numerical models and codes were used in State Enterprise "Dneprogiprovodchoz" and in the educational process of DNUZT after the name of academician V. Lazarian (The acts of introduction are added). Range of application: the models can be used at the Ministry of Ecology and Natural Resources, at the Rescue teams of Special State Transport Service; development of PLAS for chemically hazard enterprises.