air quality dispersion Articles | Environmental XPRT

Dispersion modelling: a tool for local air quality management

A local air quality management system, and the use of dispersion modelling as a tool for the system, are described. The Turkish town of Gehze is used as a model.Keywords: air pollution, air quality management, dispersion modelling, ...

Oct. 28, 2004

By Inderscience Publishers

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 ...

Jun. 28, 2009

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 ...

Oct. 15, 2014

By Inderscience Publishers

Canarina DISPER Software · air quality dispersion model · algorithms 3

Canarina DISPER Software · air quality dispersion model Symbol / Definition Ly= Initial plume length for Schulman-Scire downwash sources with enhanced lateral plume spread (m) Lb= Lesser of ...

Nov. 11, 2011

By Canarina Environmental Software

Canarina DISPER Software · indoor air quality dispersion · algorithms 8

Canarina DISPER Software · indoor air quality dispersion 9.1.3 Wind Speed Profile The wind power law is used to adjust the observed wind speed, uref, from a reference measurement height, ...

Nov. 12, 2011

By Canarina Environmental Software

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 ...

Oct. 30, 2011

By Inderscience Publishers

Legionnaires is an Air Quality Risk

The recent Bronx, NY outbreak of Legionnaires infections is a grim reminder of the deadliness of this strain of pneumonia. Like many of the outbreaks, cooling towers caused this one. Twenty have been identified but the search is still going on. Over 120 people were infected and 12 have died. Tragically it affects the most vulnerable people–people with one or more immune system deficiencies. ...

Aug. 19, 2015

By ProMark Associates, Inc.

Urban Air Quality Management

' Poor air quality due to pollution is a serious environmental problem in most urban areas. The greatest burden of pollution is on human health. Urban air quality management requires an integrated approach that (i) identifies the most serious problems and measures that offer cost-effective and feasible solutions across a range of economic sectors and pollution sources including industries, ...

Dec. 31, 1996

By The World Bank

Air dispersion modelling for individual exposure studies

The concentration fluctuations of a dispersing hazardous gaseous pollutant in the atmospheric boundary layer, and the hazard associated with short–term concentration levels, demonstrate the necessity of estimating the magnitude of these fluctuations using predicting models. To predict and estimate the maximum expected dosage and the exposure time within which the dosage exceeds certain health ...

Jun. 17, 2012

By Inderscience Publishers

Determinating the influence of different PM 10 sources on air quality in Ljubljana basin with CALPUFF dispersion model

Ljubljana has an unfavourable geographical location in the basin, almost entirely surrounded by high hills. Winds in the basin are often weak and situations with temperature inversion are very frequent, therefore, many PM 10 daily limit value exceedances were observed in 2011. The Directive 2008/50/EC (EU, 2008) requires member states to adjust or provide new air quality plans in order to ...

Oct. 15, 2014

By Inderscience Publishers

Validation of regulatory micro-scale air quality models: modelling odour dispersion and built-up areas

Gaussian and Lagrangian model runs are evaluated in comparison to field data from the Odour Release and Odour Dispersion (OROD) project and to wind tunnel data from the Mock Urban Setting Test (MUST). Different statistical metrics are discussed. The results illustrate once again that a good model performance is strongly dependent on the model input (e.g., terrain data, roughness length). ...

Dec. 13, 2011

By Inderscience Publishers

ALL4 Air Quality Modeling Update

As it’s been over a year since my last air quality modeling-related 4TR article, I thought it appropriate to provide a general status report on the air quality modeling updates that have occurred over the last year. ...

Apr. 6, 2014

By All4 Inc.

A modelling system for air quality management

To develop effective air quality management strategies at regional and urban levels requires the preparation of several actions belonging to different scientific areas and analysis of their complex interactions. A well-structured management system must be based on efficient tools that integrate diverse sets of information - emissions, traffic, meteorological variables and air quality data. ...

Jan. 25, 2004

By Inderscience Publishers

Forecasting air quality in the Greater Athens area for the year 2004: an intercomparison of the results of four different dispersion models

Forecasts for the NOx concentration levels in the Greater Athens area in 2004 are compared to the corresponding figures for 1990. Simulations are performed for two meteorological cases using four different dispersion models. Two different emission inventories are employed in the simulations. The first is based on the conditions for the year 1990, while the second is the reference scenario for the ...

Jan. 25, 2004

By Inderscience Publishers

Canarina DISPER Software · air dispersion · algorithms 1

Software · air dispersion · algorithms 1 Symbol / Definition A = Linear decay term for ...

Nov. 8, 2011

By Canarina Environmental Software

Mesoscale transport of air pollutants over Athens: implications for air quality

Air pollutants released from sources located near and around extensive conurbations such as the Athens Metropolitan Area, can be transported over them under various atmospheric conditions. Some of the industrial sources located to the north-east of Athens are directly responsible for the transport and dispersion of a large number of pollutants. In this paper the result of a number of simulations ...

Sep. 15, 2009

By Inderscience Publishers

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 ...

Feb. 17, 2009

By IVU Umwelt GmbH

Managing air quality during regulatory changes

This paper discusses the regulatory and technical issues associated with the revisions to the US EPA Guideline on Air Quality Models. The proposed guideline includes the models AERMOD, CALPUFF, and ISC-PRIME, all of which contain significant technical improvements over prior models. Differences in modelling requirements are appearing as regulatory agencies and industries use technically superior ...

May 10, 2004

By Inderscience Publishers

National Ambient Air Quality Standards Update

You have seen ALL4 documenting the corresponding evolution of the NAAQS levels since the current U.S. EPA administration started in January 2009, and we will continue to follow them closely and provide you with updates that we think are important to your operations. The following sections provide updates on the most important NAAQS and how you can plan for them today. Discusses SO2, ...

Mar. 23, 2015

By All4 Inc.

The Google Earth tool for studying Air Quality

Any person involved in air quality studies knows that cartographic representation of data (input, output or measured) is very important, time consuming and, most often, difficult. One of the difficulties is to find a suitable cartographic base over which the information (sources, sensible receptors, buildings, isopleths, etc.) must be represented. Sometimes the cartographic base is available, but ...

Feb. 19, 2008

By Enviroware s.r.l.

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