ASPECTS CONCERNING MODELING OF THE AIR POLLUTANTS DISPERSION PUBLISHEDGilda Diana Buzatu
European directives on ambient air quality enter for the first time in Europe the concept of modeling in air quality assessment and management. Modeling of air quality management improves efficiency of the air quality management. By modeling, you can identify the contribution of various categories of sources to overcome the limits. Another major advantage of the use of modeling air pollutants in air quality management and evaluation is to improve capability to represent the spatial distribution of concentrations of pollutants, with effect from regional scale to local scale, even at the level of cities and streets. Furthermore, modeling will contribute to compliance or non-compliance to the quality objectives set by legislation while helping to identify areas where limits are exceeded. Impact assessment of air quality due the operation activities belonging to S.E. Craiova II was performed by mathematical modeling, the results reference to limits set by Order of the Minister of Water and Environmental Protection no. 592/2002 for approving the Norms on setting limits, the threshold values and criteria and methods of assessment of sulfur dioxide, nitrogen dioxide and nitrogen oxides, particulate matter, lead, benzene, carbon monoxide and ozone in ambient air, supplemented by the Order of the Minister of Environment and Water Management no. 27/2007. To calculate the dispersion of gaseous and particulate pollutants discharged into the atmosphere we used a specialized program called SIMGP v.4 developed under Visual Basic platform after the complete theory of the American model ISC3 (Sources Industrial Complex Models). The selection model is an important issue as there is no dispersion model recommended. Each model used should meet the needs of the particular analyzed case. Hundreds of models are available, and differences between their complexity and capacity to meet distinct physical or chemical processes in the atmosphere are evident. In this view, in this paper we will attempt a study of modeling the dispersion of pollutants at local level which will focus on assessing the impact on air quality resulting from emissions sources associated with the activities of the S.E. Craiova II, and quantify the impact that some air pollutants are having on the viticultural agroecosystems from the Dealurile Craiovei area by calculating the probabilities of exceeded maximum allowable concentrations for 30 minutes.
dispersion; modeling; NO2; total powders