gaussian plume air dispersion modeling Articles
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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 ...
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Model evaluation of the Austrian Gaussian plume model ON M 9440: comparison with the Copenhagen and the Lillestrom datasets.
The Austrian Gaussian plume model ON M 9440 is evaluated with the Copenhagen and the Lillestrom datasets using the workshop model validation kit. Results strongly depend on the dataset used. Calculated concentrations agree best with the Copenhagen data (including the previous evaluation with the Kincaid data by Pechinger and Petz, 1995). As with other Gaussian models, there were problems with ...
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A Gaussian puff model with optimal interpolation for air pollution modelling assessment
A Gaussian plume model was modified to simulate the dispersion of non-reactive air pollutants under non-homogeneous wind conditions through a multi-puff approach. It was applied to the city of Lisbon and evaluated by comparison with measured sulphur dioxide data, showing a reasonable skill to estimate the transport and dispersion of pollutants under complex wind field and different atmospheric ...
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A new model validation database for evaluating AERMOD, NRPB R91 and ADMS using krypton-85 data from BNFL Sellafield
The radioisotope krypton-85 (85Kr) is emitted into the atmosphere from nuclear fuel reprocessing plant. Releases from the BNFL Sellafield complex have been used to evaluate the performance of regulatory atmospheric dispersion models. Field measurements of 85Kr, associated emissions and meteorological data and dispersion model predictions have been collated into a model validation database that ...
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Comparison of AERMOD and EIAA with respect to the Alaska tracer data
This paper inter-compares the performance of AERMOD and EIAA (the current Chinese regulatory model) against the Alaska tracer field experiment. The predicted maximum arc-wise Ground Level Concentrations (GLC) are compared with the observed tracer field data. The scatter plots, QQ plots, and residual plots are examined. EIAA frequently underestimates the GLC because it lacks any downwash ...
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Uncertainty adjustments to deterministic atmospheric dispersion models
Atmospheric Dispersion Models (ADMs) are routinely used in environmental impact assessment, risk analysis, and source apportionment studies. There are a variety of such computational ADMs, but these models usually only provide deterministic predictions or estimation of uncertainty. By introducing error components in ADMs, we formulate statistical modelling to obtain more precise prediction. These ...
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Applied comprehensive NO2 and particulate matter dispersion modelling for Switzerland
This paper presents the NO2 and Particulate Matter (PM) dispersion modelling for the whole of Switzerland. Air quality maps are computed for the year 2000 and future years. Future developments like the EURO-4 legislation on motor vehicles are taken into account. For all major source groups (road traffic, off-road traffic, industry, households, etc.), separate countrywide emission inventories with ...
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Comparison of measured and modelled NO2 values at Zurich airport, sensitivity of aircraft NOx emissions inventory and NO2 dispersion parameters
This paper presents a comparison of modelled and measured annual mean NO2 concentrations around Zurich airport. Modelled concentrations were derived from the LASAT Lagrangian model for the airport and from a Gaussian plume model for the Zurich canton. The measured annual mean NO2 concentrations were monitored at stations within the airport. The modelled airport NO2 concentrations fell below 1 ...
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Model evaluation of the Austrian Gaussian plume model ON M 9440: comparison with the Kincaid dataset
The Austrian Gaussian plume model ON M 9440 is evaluated with the Kincaid dataset using the workshop model validation kit. Results are shown for different meteorological options. Mean model concentrations compare well with or overestimate measured data, depending on the choice of these options.Keywords: Gaussian plume model, Kincaid data, model evaluation, plume rise, atmospheric dispersion ...
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Application of meteorological pre-processor for next generation dispersion models for Hungary
Research has been started by Hungarian regulatory modellers for the preparation of next generation dispersion models applied in EIA studies. This new generation will require advanced planetary boundary layer parameters in Gaussian plume models. The author investigated the validation of the meteorological pre-processor TRIP for Hungary.Keywords: meteorological pre-, processors, atmospheric ...
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Modelling the dispersion of motor vehicle exhaust gases, including building effects, and its application to the calculation of NOx concentration in Osaka City
This paper presents a model for dispersion of NOx from motor vehicles and stationary sources in urban areas. Annual average NOx concentrations from these sources were calculated using the Gaussian plume model. The calculated concentrations were compared with the observed concentrations at 67 air monitoring stations located in Osaka Plain. The effect of mechanical turbulence resulting from ...
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Study of turbulence and pollutant dispersion in a neutrally and unstably stratified atmosphere using a second-order closure boundary-layer model
A one-dimensional, mesoscale second-order closure boundary-layer model is developed to simulate wind flow in a horizontally homogeneous atmosphere. The velocity, potential temperature and turbulent kinetic energy are calculated prognostically, while other second-order moments are modelled diagnostically. The calculated turbulence is then treated as background turbulence to model the dispersion of ...
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