dispersion modeling emissions Articles

  • 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

  • RoadAir - Road network emission and dispersion model

    Traffic is the main source of air pollution in many urban areas. RoadAir is a computerized planning tool for calculating emissions and concentrations of air ...

  • Regulatory dispersion modelling in Finland

    We present a review of regulatory atmospheric dispersion models and their application to environmental impact assessment (EIA) in Finland. The following regulatory models are available: the urban dispersion modeling system, models for dispersion of vehicular pollution, the air pollution information system, and the dispersion model for odorous compounds. All of these models are connected to a ...


    By Inderscience Publishers

  • A comprehensive experimental databank for the models verification of urban car emission dispersion

    A summary presentation is made of representative samples from a comprehensive experimental databank on car exhaust dispersion in urban street canyons. Physical modelling, under neutral stratification conditions, was used to provide visualisation, pollutant concentration and velocity measurements above and inside test canyons amidst surrounding urban roughness. The study extended to two different ...


    By Inderscience Publishers

  • A comprehensive experimental databank for the verification of urban car emission dispersion models

    A summary presentation is made of representative samples from a comprehensive experimental databank on car exhaust dispersion in urban street canyons. Physical modelling, under neutral stratification conditions, was used to provide visualisation, pollutant concentration and velocimetry measurements above and inside test canyons amidst surrounding urban roughness. The study extended to two ...


    By Inderscience Publishers

  • An application of a puff dispersion model on power plant emissions in Yatagan region, Turkey

    The present paper describes the application of the CALMET meteorological model and CALPUFF plume dispersion model to the Yatagan district to study the impact of Yatagan Power Plant emissions on the SO2 levels on December 2000 in the region. Results indicate that SO2 concentrations over the city depend strongly on advected emissions from the power plant and on the ...


    By Inderscience Publishers

  • Complex terrain dispersion modelling exercise

    In the framework of the Fourth Workshop, a model inter-comparison exercise is proposed with respect to environmental impact assessment. The purpose of the exercise is to study the compatibility of the performance of similar dispersion models over complex topographies. Contributors were asked to use the same meteorological input over complex terrain topography and to perform dispersion ...


    By Inderscience Publishers

  • A Lagrangian dispersion model with chemical reactions

    A Lagrangian stochastic (single particle) model is modified in order to account for simple chemistry reactions and tested against measured wind tunnel data. These data refers to a reactive plume generated by a single point source of NO inside a turbulent grid flow doped with ozone. The comparisons were made at different distances from the emission considering all the substances involved in the ...


    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 ...


  • Modelling dispersion of smoke from wildfires in a Mediterranean area

    We present a modelling system for the estimation of forest fire emissions ( prebolchem-fire ) and their inclusion in the atmospheric composition model BOLCHEM. Emission fluxes have been estimated following the methodology proposed by Seiler and Crutzen (1980) and using MODIS ‘burned area product’. Then they are modulated following the WRAP approach (WRAP, 2005). This approach is also used for ...


    By Inderscience Publishers

  • Gas dispersion modelling harmonisation: an industrial viewpoint

    The harmonisation of gas dispersion modelling across Europe requires not only harmonisation of the physics incorporated into different mathematical models but also harmonisation of the way that practitioners actually use these models. This paper highlights the need to define minimum acceptable standards for gas dispersion modelling, especially in the specification of source conditions and ...


    By Inderscience Publishers

  • 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 dataset for the validation of flow and dispersion models at an urban intersection

    Dispersion modelling concerning air pollution caused by road traffic is reduced to a two-dimensional problem within street canyons. However, significant pollution loads are also to be expected at intersections. In this case, three-dimensional flow and dispersion structures have to be considered. For the validation of models claimed to be applicable to intersections, measurements of meteorological ...


    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

  • Comparison of the Polish regulatory dispersion model with AERMOD

    Implementation of the 96/62/EC air quality directive in Poland imposes new requirements that cannot be met by the present Polish regulatory climatological dispersion model that is mandatory in emission permit procedures. For use in the air quality management system, newer models have been recommended. This inevitably brings questions regarding consistency between models used for both the ...


    By Inderscience Publishers

  • Dispersion modelling near tunnel exits: simulation and measurements

    Measurements of car exhaust gases were made in May/June 1995 in the vicinity of the Bielefeld tunnel. CO and NOx from car exhausts were measured to allow comparison with a model simulation. Ozone was also measured. These measurements were made using commercial continuous analysers. A valve control system was used to investigate the dispersion of the trace gases. This allowed measurements at ...


    By Inderscience Publishers

  • Applying Proper Dispersion Models for Industrial Accidental Releases

    Even though many industrial facilities have put extra efforts to prevent accidental releases of active and inactive chemicals from processes or storage, accidental releases do happen from time to time due to many reasons. Federal and state regulations require industrial facilities to evaluate and report the impacts of potential accidental releases in terms of distances to toxic endpoint ...


    By Trinity Consultants

  • Dispersion Modeling as a Tool to Establish Odor Policy

    Odor control is a critical component of the Orange County Sanitation District’s (the Sanitation District) planning and operations. The Sanitation District’s two wastewater treatment plants (Fountain Valley, CA and Huntington Beach, CA) were isolated when originally constructed in the middle of the 20th century, but are now surrounded by high-density residential areas as well as highly used ...

  • Applying Proper Dispersion Models for Industrial Accidental Releases

    Even though many industrial facilities have put extra efforts to prevent accidental releases of active and inactive chemicals from processes or storage, accidental releases do happen from time to time due to many reasons. Federal and state regulations require industrial facilities to evaluate and report the impacts of potential accidental releases in terms of distances to toxic endpoint ...

  • Dispersion of buoyant emissions from low level sources in urban areas: water channel modelling

    A laboratory study was done to investigate dispersion of buoyant emissions from near surface sources in urban areas. Ground level concentrations under different surrounding building geometries were measured using a newly developed system based on laser induced fluorescence. In the presence of upstream buildings AERMOD (AMS/U.S. EPA regulatory dispersion model) is unable to explain concentrations ...


    By Inderscience Publishers

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