dispersion modeling Articles
-
Air quality assessment in Bologna by an urban dispersion model
An urban dispersion model (ADMS?Urban) was run to calculate PM10 and NO2 concentration during a one-year period, on a district of Bologna, Italy. Moreover, the exposure of 333 children was estimated using model outputs corrected with observations. The model was able to correctly simulate the long-term statistical properties of roadside observed concentrations (such as annual mean and frequency ...
-
The sustainable development of Heathrow Airport: model inter-comparison study
Air quality modelling near airports has received attention due to the impact of emissions from aircrafts near ground level. This work is part of the model inter-comparison study undertaken for the Department of Transport in connection with air quality near Heathrow Airport. Results formed part of a submission to the UK government in July 2006. The Emissions and Dispersion Modelling System (EDMS) ...
-
Particulate matter dispersion modelling along urban traffic paths
In this paper authors compare two different approaches of 10 μm particles (PM10) dispersion modelling in urban areas. The study is focused on comparison of the Eulerian-Lagrangian approach accurately describing particle aerodynamics and the passive scalar approach representing simplified alternative for description of dispersion processes. CFD code StarCD has been used for this study as ...
-
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 ...
-
Lisbon air quality: evaluating traffic hot-spots
This paper presents an air quality study in an urban traffic hot-spot in Lisbon, Portugal, by comparing the atmospheric pollutant concentrations obtained by a numerical model with measured values. Results indicate that the mean variation of particle and gaseous concentrations followed the traffic flow rate, evidencing the occurrence of PM10 concentrations greater than the respective air quality ...
-
Source apportionment technique: inorganic aerosol transformation processes in the Milan area
The CAMx chemical and transport Eulerian model has been applied over a domain focused on the Milan area (Northern Italy) for the whole 2004, on the basis of CityDelta III project input data set. Model results have been analysed by mean of the Source Apportionment technique at the Milan receptor. A quantitative analysis of the main processes governing the Secondary Inorganic Aerosols (SIAs) ...
-
Modelling the meteorology and traffic pollutant dispersion in highly complex terrain: the ALPNAP Alpine Space Project
An integrated methodology was applied, within the framework of the ALPNAP Project, to study the meteorology and traffic pollutant dispersion in highly complex topography, the Frejus Alpine transect area. Three episodes, characterised by strongly critical dispersive conditions, were considered in the year 2004. The atmospheric circulation and pollutant dispersion were simulated using RMS ...
-
PM source apportionment analysis in the Venetian area
A CALMET–CAMx system was implemented to investigate PM10 source apportionment in the urban area of Venice. The modelling system was run for two winter months on a domain covering most of the Veneto region with a 4 km resolution mesh and a 1 km nested grid over Venice and its mainland area, in order to distinguish the local emission contributions from the regional ones. A brute–force method was ...
-
Current trends in the use of models for source apportionment of air pollutants in Europe
Forum for Air Quality Modelling in Europe (FAIRMODE) sub–group 2 (SG2) on the 'Contribution of natural sources and source apportionment' has been formed in response to the need for a harmonised European approach in the use of models for source apportionment, addressing the requirements of the current Air Quality Directive 2008/50/EU. Within SG2, a review was performed on source apportionment ...
-
Modelling of aerosol in the Greater Athens Area, Greece
Aerosols have recently been defined as a serious atmospheric pollution problem in the Greater Athens Area (GAA). This research is mainly focused on assessing the PM10 concentration levels in the GAA atmosphere through simulations. The model results of the chemical constituents of PM10 are satisfactory comparing to measurements; the discrepancies are attributed to the re-suspended and seaborne ...
-
Quality control in dispersion modeling: Validation of a screening model for PM10 and NO2
European air quality guidelines require gathering information about air quality at locations where the population is affected or possibly affected by high concentrations. High concentrations are often found in densely built up streets with high traffic loads. In order to identify these hot spots and to assess possible measures to improve the situation, screening models are widely applied in ...
-
SICAH: an automatic system for the control and prevention of air pollution in Huelva (Spain)
An automatic system for control of the air pollution in the industrialised area of Huelva has being developed by CIEMAT. This system is called "Sistema informatico para control y prevencion de la contaminacion atmosferica en Huelva" (SICAH). SICAH is a Visual C++ programme that runs under Windows 95/NT. SICAH includes a Geographic Information System (GIS) and runs Fortran numerical ...
-
Plans and programmes to improve air quality over Portugal: a numerical modelling approach
PM10 limit values have been surpassed in the northern region of Portugal, and, according to European legislation, Plans and Programmes (PP) must be designed and implemented to reduce those PM10 levels. The Air Pollution Model (TAPM) was applied over the study region, to the year 2004, for the reference situation with the current PM10 emissions; and, for the reduction scenario with PM10 emissions ...
-
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 ...
-
Dispersion modelling of traffic particulate matter in city–scale area
This paper introduces utilisation of the CFD technique for modelling of PM10 (particulate matter 10 µm) dispersion in urban areas, with focus on detailed description of processes in the ground surface boundary layer. The description of deposition and re–suspension processes is introduced and applied on the city–scale model of the city of Brno (pop. 400,000). The air threshold velocity of ...
-
`Sensitivity of Aermod in modeling fugitive dust emissions sources,` presented at guideline on air quality models: next generation of models conference 2009
Abstract Dispersion modelers have long faced challenges estimating ambient pollutant concentrationscaused by releases from “fugitive” sources of particulate matter, such as paved and unpavedroadways, raw material storage piles, outdoor material processing operations, agriculturalactivities, or windblown dust in general. Fugitive emissions are commonly defined as those thatcould not ...
-
Application of a Lagrangian particle model to the source apportionment for primary macropollutants in Taranto area (South Italy)
A modelling system has been applied to estimate the annual contribution to the total concentrations of different pollutant sources in Taranto, one of the most industrialized areas in Italy. Industrial sources, traffic, domestic heating and harbour emissions have been taken into account. Modelling system includes 3-dimensional meteorological models SWIFT-SURFPRO with the Lagrangian particle ...
-
Sensitivity of CTM simulations to meteorological input
The objective of this work is to investigate the sensitivity of an Eulerian Chemical Tranport Model to the reconstruction of the wind field. In the framework of City-Delta exercise, three 14-day simulations have been performed, using the same model (CAMx) and different meteorological inputs; these were built combining large-scale analysis, local observations and the output of a high resolution ...
-
Impact of meteorological modelling on air quality: summer and winter episodes in the Po valley (Northern Italy)
The Po–valley in Northern Italy has been identified as a hot spot area in Europe where pollutant levels are expected to remain problematic in the years to come. High anthropogenic emissions in combination with frequently occurring stagnant atmospheric conditions cause very high concentrations of pollutants. Sensitivity tests for one winter month have shown that the nudging of observational data ...
-
Evaluation of new model tools for meeting the targets of the EU Air Quality Directive: a case study on the studded tyre use in Sweden
Two new model tools have been developed for meeting the EU Air Quality Directive targets: SIMAIRroad (related to traffic emissions) and SIMAIRrwc (rwc standing for residential wood combustion). The models have been evaluated for different traffic situations and for residential areas with wood combustion, with promising results. The models can calculate PM10 statistics, such as mean values and 90 ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you