dispersion modeling regulatory Articles
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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 ...
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Atmospheric dispersion models for regulatory purposes in the Federal Republic of Germany. Part I: Regulatory modelling
The legal framework for the application of atmospheric dispersion models for air pollution control in Germany is outlined. Atmospheric dispersion models in regulatory procedures are currently essentially based on the Gaussian approach. However, more advanced modelling is already available.Keywords: air pollution control, atmospheric dispersion models, Gaussian model, Germany, regulatory ...
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A dispersion model intercomparison archive
The paper introduces a formal archive for intercomparison of conventional regulatory dispersion models. It stems from an initial intercomparison, for the UK Environment Agency, of the USEPA's ISC and AERMOD models with the ADMS model, in common use in the UK. The objective is to compare the models directly with one another via standard test cases in order to reveal differences that may arise in ...
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Intercomparison of methods for parameterising components of the surface energy balance - a summary of Working Group 1 - COST 710 results
Working Group 1 of COST Action 710 investigated the use of meteorological pre-processors for short-range dispersion models for regulatory purposes. Two commonly used schemes for estimating boundary-layer fluxes from standard meteorological observations were intercompared using high latitude measurements from Sweden for spring/summer and winter conditions. Ground heat fluxes estimated with five ...
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Investigation of the regulatory atmospheric dispersion model used in China, and its comparison with some other models
The regulatory atmospheric dispersion model used in China (CRADM) is briefly described, and the main differences between CRADM and the models used in western countries, such as HPDM and AMS, are analysed. The various aspects of CRADM, HPDM and AMS for same input are compared and discussed. Especially, it is indicated that the Briggs plume rise formula in neutral conditions overestimates the real ...
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Evaluation of new generation atmospheric dispersion models
The paper considers the regulatory view of evaluating dispersion models. There is no proscription for regulatory studies in the UK, so differences between dispersion calculations from different models and versions of models are then as important as their absolute veracity. An example shows variations in calculated concentration due to variations between two different versions of a model and two ...
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Dispersion modelling intercomparison exercise
In the framework of the "Fifth workshop Harmonisation within atmospheric dispersion modelling for regulatory purposes", a model intercomparison exercise was performed which aimed to assess (i) the environmental impact, and (ii) the compatibility of the performance of similar dispersion models under severe weather and topography conditions. The contributors were asked to use the same ...
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Development And Evaluation Of The ADMS Buildings Effects Module
The ADMS building effects module (Robins et al, 1997) treats many of the special features of dispersion near buildings, e.g.: plume impact on building surfaces, entrainment into a well mixed, recirculating, near-wake, rapid dispersion of material released into the near-wake, plume height changes due to mean flow deflections over the building and its wake, modified dispersion due to reduced ...
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Factors affecting inter-annual variability of NOx and NO2 concentrations from single point sources. (PDF)
In the application of dispersion modelling for regulatory purposes questions frequently arise regarding the meteorological data used for the study: in particular how many years data are sufficient; is the meteorological site representative of the dispersion site? Although studies have been conducted on the impact of meteorology from different years on ground level concentrations from point ...
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Intercomparison of different regulatory and Eulerian dispersion models: an application for the electric power plant in Rhodes Island
This study tries to inform the user of the abilities and limitations of dispersion models by comparing their differences in air pollution estimations. In particular, an intercomparison between the results of Eulerian and regulatory dispersion models for the new electric power plant in Rhodes Island is carried out, in order to emphasise their differences. The Eulerian models used in this study are ...
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Validation of the improved AEROPOL model against the Copenhagen data set
The improved Gaussian dispersion model AEROPOL (University of Tartu, Estonia) is validated against the Copenhagen air pollution dispersion dataset belonging to the Model Validation Kit of the Initiative on "Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes". Model updates include the application of: surface heat flux instead of indirect indicators of surface layer ...
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Setting up a regulatory frame for atmospheric dispersion modelling in Italy: needs, actors and ongoing activities
The need for regulatory models for predicting the impact of atmospheric emissions, both for Environmental Impact Assessment (EIA) studies and in the frame of Air Quality Management Plans (AQMP), is well known to the Italian technical-scientific community, and is acknowledged also by decision makers. Some specific features of the Italian territory, e.g. complex orography, land-sea discontinuity ...
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A new Russian regulatory dispersion model "MEAN" for calculation of mean annual concentrations and its meteorological pre-processor
A new Russian regulatory dispersion model "MEAN" is based on integration of the analytical expressions which approximate the numerical solution of the advection-diffusion equation (ADE). The meteorological preprocessor of this model uses routine information from the national meteorological network to estimate and process necessary dispersion parameters. Turbulent fluxes of the sensible ...
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Performance criteria for the benchmarking of air quality model regulatory applications: the 'target' approach
The definition of appropriate performance criteria is one of the key issues for the benchmarking of air quality models in regulatory applications. As part of the FAIRMODE benchmarking activities (Thunis et al., 2010), suitable criteria for air quality modelling in the frame of the EU air quality directive (AQD) 2008 are proposed and tested. The suggested approach builds on the target indicator ...
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Recent studies to validate and compare atmospheric dispersion models for regulatory purposes in the UK
Some results are presented for recent studies to develop new approaches for (i) validating atmospheric dispersion models using crosswind concentration transects, and (ii) summarising and comparing the predictions of models across a range of efflux and meteorological conditions.Keywords: crosswind concentration, dispersion climate, dispersion modelling, ...
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Atmospheric dispersion models for regulatory purposes in the Federal Republic of Germany. Part II: the current situation
This paper starts with some remarks on the present air pollution situation in Germany. The air quality standards will be presented and compared with data from the continuous monitoring network stations. Subsequently a short description of the tools in use for regulatory applications is given. The quality of these tools and their status of validation are critically discussed. Finally, conclusions ...
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The Third Workshop's environmental impact assessment model intercomparison exercise
Twelve European modelling teams calculated the impact of a 600 MW power plant, using one of their national regulatory transport and dispersion models. They were asked to report the model results in a uniform way and to provide detailed information on the meteorological data and on the model used. Three modelling teams, from Greece, Germany and Belgium, used the same meteorological dataset. The ...
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Inter-comparison of the AUSTAL2000 and CALPUFF dispersion models against the Kincaid data set
Regulatory air dispersion models AUSTAL2000 and CALPUFF are validated by comparing the predicted Ground Level Concentrations (GLC) with the measured dataset resulting from the dispersion of an elevated, buoyant plume release in the Kincaid power plant experiment. Standard statistical measures of the model results are inter-compared. Their performance is scrutinised using scattered, ...
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`Procedures Used by U.S. EPA to Develop & Adopt Newer Dispersion Models,` presented at the Harmonization within Atmospheric Dispersion Modeling for Regulatory Purposes, Rouen, FR
Abstract This paper summarises the management and procedural issues that led to the successful development of AERMOD and CALPUFF and how they will come to be approved regulatory models by the U.S. EPA in the next few months. The legal requirements for constantly updating models is contained in the 1977 Clean Air Act that requires U.S. EPA to publish a "Modeling Guideline" and to hold a hearing ...
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Meteorological data from numerical weather prediction or observations for dispersion modelling
Synoptic observations of wind speed, direction, cloud cover, precipitation and temperature are inputs to regulatory dispersion modelling. Numerical Weather Prediction (NWP) data generated by national meteorological services are easily formatted for dispersion models. Changing from observations to NWP data raises concerns amongst regulators and model users – how might impact assessments differ if ...
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