The aim of this project was creation of the mathematical model and application of the simulation of dispersion of vehicular air pollution in urban area. The objective of the project was to develop an application, which time and memory complexity would allow operate on most of the personal computers. The final application is created as a result of integration of two projects concerning development of the simulation and development of the visualisation and user interface (Kawulok, 2001).
A grid of squares is used to model the area of the city. Movements of particles of pollutants between squares are modelled using the solution of diffuse differential equation developed to the requirements of three dimensions of the city and the simulation. The final form of the simulation was adjusted to the real conditions using available data sets of the measurements.
Development of the projectís software covers implementation of the simulation and implementation of the database including input data of the simulation. The implementation of the application was carried out carefully with the special consideration of the efficiency objectives of the project.
There are two areas of the future development of the application. The first one may include improvement of the results of existing application using new available measurements. The other one covers addition of new, more advanced functionality considering bigger set of the input data of the simulation.
The quality of the results received from the created application differ with the conditions of simulation. The comperison of the results of the simulation with the predictions of the model presented by Matzoros and Van Vliet and the measurements gathered at the simulated area shows the abilities of the created model.
The results of twenty four hours simulation. Concentration of pollution when the average wind velocity is 5.25m/s and the average temperature is 7.3°C.
The coefficients of deviation, relative deviation and correlation, calculated for the simulation shown above have a form:
|Deviation [g/m^3]||Relative deviation [%]||Correlation|
|The model of Matzoros and Van Vliet||0.000597||28.0486||0.772925|