NUMERICAL METHODS FOR SOLVING POLLUTION PROBLEMS IN AQUIFERS PUBLISHEDMihaela Violeta Bakos
Pollution of aquifers is a major environmental policies worldwide, show numerous international events dedicated to this subject. Remedial and protective measures undertaken are limited, often not reaching the expected efficiency failed due to excessive costs necessary to remedy, because the application of inappropriate methods and technologies as well as relatively long time necessary to remedy the aquifers. Currently we have a specialized unit able to develop and solve an aquifer pollution from its definition to implement remedies. Recent reports show that post that pollution, despite progress made in the field, remains a major reason for concern due to direct discharges, due to indirect discharges through nitrogen fertilizer and pesticides, and due to leakage from old or contaminated industrial sites in landfills. Although point sources of pollution have caused most of the pollution identified so far, there are data showing that the diffuse sources have a growing impact on groundwater. For proper pollution problems exist in the aquifer analytical solutions and numerical solutions in this paper we present numerical methods used to solve the problems of contaminated groundwater, and we will give special attention Finite Difference method and Random Walk method. These methods provide a representation in space and time of pollutant concentration. Market appeared many programs for calculating the concentration of pollutants in the aquifer, but are very expensive and require a very good knowledge of the input parameters, an understanding of the phenomenon and the scope of use. We present an example of pollution of aquifers, using the modeling ASMWIN. The process of transport of pollutants in the aquifer it will take into account the following aspects: physical and chemical properties of pollutants, the environment in which they learn the transport of pollutants, the state that is found underground pollutants in the environment: and the processes that control the transport of contaminants in the environment Underground: The main objective pursued in this work is to develop mathematical models to study processes taking place in aquifer pollution. The results obtained may contribute to an overall program evaluation, monitoring and remediation of aquifers that are in line with the main trends and orientations in the field of protection of groundwater resources on a European and global.
aquifer; pollution; difference finite method; random Walk method