air pollution dispersion Articles

  • Development of an integrated system for air pollutant dispersion modelling

    A complex expert system for air pollutant dispersion modeling (ScalEx) is currently being developed at Faculty of Technology and Metallurgy in Belgrade. The project goal is to develop a powerful software system as an engineering toolbox for modelling air pollutant dispersion under various conditions and terrain configurations. ScalEx is planned to be an integrated software system of the new ...


    By Inderscience Publishers

  • On the dispersion models and atmospheric dispersion

    As an air pollutant is transported, the pollutant disperses into the surrounding air so that it arrives at a lower concentration than it was on leaving the source. Strict environmental regulations worldwide resulted in a growing concern about the validity of air quality dispersion models. The present work is a try to evaluate the applicability of some dispersion models on the emission from an ...


    By Inderscience Publishers

  • Dispersion models and air quality data for population exposure assessment to air pollution

    Evaluating the extent of exposure to chemicals in absence of continuous measurements of their concentration in air and direct measures of personal exposure is crucial for epidemiological studies. Dispersion models can be a useful tool for reproducing spatio-temporal distribution of contaminants emitted by a specific source. However, they cannot easily be applied to short-term epidemiological ...


    By Inderscience Publishers

  • Dispersion modelling of toxic air pollutants from fossil fuel combustion facilities

    The emissions of toxic air pollutants from three power plants and one oil refinery were measured for a period of six months and dispersion of pollutants were calculated by using Air Dispersion Modelling Software (ADMS–4). The plume concentration of carbon monoxide, oxides of nitrogen, sulphur dioxide and particulate matter were calculated over long distances to estimate the incremental ...


    By Inderscience Publishers

  • Application of dispersion models for evaluating the influence of urban air pollution on human health

    The main objective of this study is to analyse quantitatively the influence of urban air pollution on the health of children, by (i) analysing the concentrations of pollutants in the atmosphere, (ii) analysing the indoor air concentrations, and (iii) conducting epidemiological surveys. The area considered is Espoo, the neighbouring city of Helsinki. We focus in particular on the influence of ...


    By Inderscience Publishers

  • Coupling of neural network and dispersion models: a novel methodology for air pollution models

    Supervised neural net models and dispersion models are two important approaches for evaluating air pollution concentrations. The authors propose the development of an integrated model, in order to optimise the performances of each methodology. The concentrations evaluated by an air pollution model are coupled with a Neural Net (NN), so as to adjust the influence of important variables on ...


    By Inderscience Publishers

  • A project "Transformation of air-pollution, modelling its transport and dispersion"

    Information about a new project is given in this contribution. The project is financed by the Czech Ministry of Environment and deals with the problem of summer photochemical smog formation. Field campaigns and utilisation of existing monitoring network data are supposed for analysing both biogenic emissions and emissions due to human activity. An important part of this project consists in ...


    By Inderscience Publishers

  • The Netherlands National Model for short-range dispersion of air pollutants

    The tool for dispersion calculations in The Netherlands originated from a consensus process among experts from licensing authorities, industry and science. This paper describes its characteristics and applications in the light of its history and future.Keywords: air pollution, consensus, atmospheric dispersion model, frequency distribution, Netherlands National Model, short range dispersion, ...


    By Inderscience Publishers

  • Revision of the Netherlands National Model for short range dispersion of air pollutants

    The Dutch National Model was revised during 1995 and 1996 in a task group consisting of representatives of the relevant institutes and universities in the Netherlands. The advanced model 'STACKS' was chosen as the model of departure. From an evaluation some modifications were agreed, in particular for the surface layer and the treatment of directional wind shear in the model. The resulting ...


    By Inderscience Publishers

  • Error Propagation in Air Dispersion Modeling

    Air dispersion modeling has been evolving since before the 1930s.  Over the last 15-25 years, strict environmental regulations and the availability of personal computers have fueled an immense growth in the use of mathematical models to predict the dispersion of air pollution plumes.  Beychok's recently published book, 'Fundamentals Of Stack Gas Dispersion', details the evolution of the widely ...


    By Air Dispersion

  • An urban scale model for pollutant dispersion in Rome

    A Gaussian model software (Atmospheric Dispersion Model System?ADMS-Urban) is used to forecast the carbon monoxide concentrations in the Urban Boundary Layer (UBL) of the city of Rome, Italy. The simulations refer to 14 days during 2002. Two data set inputs were considered in order to evaluate the urban background concentration and the effects of the main roads surrounding the monitoring ...


    By Inderscience Publishers

  • A fast model for pollutant dispersion at the neighbourhood scale

    This paper is devoted to the development and evaluation of a fast three–dimensional Eulerian model for dispersion inside and above the urban canopy layer. Spatially averaged wind and diffusivity coefficient profiles obtained from the commercial Computational Fluid Dynamics (CFD) code FLUENT are used as input in the developed model. This model is numerically solved by means of a finite volume ...


    By Inderscience Publishers

  • A fluctuating plume model for pollutants dispersion with chemical reactions

    A fluctuating plume model for pollutant dispersion is developed. The model is able to include chemical reactions, accounting for segregation. The model is tested against measured data in wind tunnel experiment, where NO is emitted from a source in an environment of ozone. The results are presented in terms of the plume centre line dispersion and cross sections at different distances. It is shown ...


    By Inderscience Publishers

  • An operational dispersion model for predicting pollution from a road

    We present here a mathematical model for predicting dispersion of pollution from a road, for use in a regulatory context. The model includes an emission model, treatment of the meteorological time series, a dispersion model, statistical analysis of the computed time series of concentrations and a graphical Windows-based user interface. The dispersion model is based on a partly analytic solution ...


    By Inderscience Publishers

  • Numerical simulations of street canyon ventilation and pollutant dispersion

    The relationship among air exchange rate (ACH), pollutant exchange rate (PCH) and friction factor ( f ) is proposed in this study to evaluate the performance of ventilation and pollution removal of hypothetical urban areas. Urban areas were simplified to arrays of idealised, repeated two-dimensional (2D) street canyons of different building-height-to-street-width (aspect) ratios (ARs) and ...


    By Inderscience Publishers

  • Numerical model of urban aerodynamics and pollution dispersion

    For analysis of atmospheric processes in the urban environment, the microscale meteorological and dispersion model M2UE is suggested, which takes into account a complex character of aerodynamics in non-uniform urban relief. The three-dimensional version of the model includes a system of Reynolds equations, two-equation k-ε model of turbulence and the 'advection-diffusion' equation to simulate ...


    By Inderscience Publishers

  • Dispersion of a passive pollutant in the vicinity of a U-shaped building

    The three-dimensional microscale numerical model MIMO was applied to calculate the dispersion of a passive pollutant in the vicinity of a U-shaped building. Three different locations of a non-buoyant source and six different wind directions were examined. The calculated concentrations were compared with concentrations measured in a boundary layer wind tunnel. The comparison shows a very good ...


    By Inderscience Publishers

  • Modelling of atmospheric pollutant dispersion in coastal areas

    Some characteristics of air pollution in Tarragona (Spain) were investigated. Tarragona has an important petrochemical industry in a coastal region with a complex terrain. The study was made numerically in sea breeze conditions with a three-dimensional mesoscale meteorological model. The temporal and spatial variations of the wind fields have been used in the Lagrangian equation for a ...


    By Inderscience Publishers

  • Inversions and air pollution in Istanbul

    Owing to the rapidly growing and inefficient usage of fuel, air pollution has increased in Istanbul. The levels are affected by the weak dispersion conditions in the city. The strength of the inversion can be explained by the temperature difference between the top and bottom boundaries and their height. In this study, nighttime surface inversion heights have been found to range between 84 m and ...


    By Inderscience Publishers

  • Fireworks air pollution in Slovenia

    Over the 'Christmas–New Year' period 12/2010–01/2011, PM10 air pollution measurements on most of the automatic measuring stations in Slovenia reached extreme values of up to 300 µg/m³. Analysis shows a very close correlation with the timings of the fireworks displays in the areas. This paper shows the other side of this cultural enjoyment - the effect on PM10 air pollution. As the correlation ...


    By Inderscience Publishers

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you