Book Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
The concentrations of gaseous pollutants carbon monoxide, nitrogen oxides (NO"x=NO+NO"2)", and sulfur dioxide were measured, and the vehicle type and traffic flow rates in an urban street canyon with an aspect ratio of 0.8 and a length to width ratio of 3 were recorded. Three-dimensional (3D) airflow and dispersion of pollutants were modeled using the RNG k-@e turbulence model, which was solved numerically using the finite volume method. Vehicle emissions were estimated from the measured traffic flow rates and modeled as banded line sources along the street. Both measurements and simulations reveal that pollutant concentrations typically follow the traffic flow rate; they decline as the height increases, and are higher on the leeward side than on the windward side. 3D simulations reveal that the vortex line, joining the centers of cross-sectional vortices of the street canyon, meanders between street buildings, and the flows leave the canyon through the top. Entrainment of outside air reduces pollutant concentrations near the street outlet, where counter-rotating vortices or secondary flows are present. Numerical predictions agree reasonably well with measurements. ... Read more

Book Description
This digital document is an article from Journal of the Air & Waste Management Association, published by Thomson Gale on August 1, 2005. The length of the article is 8755 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

Citation Details
Title: Three-dimensional modeling of air flow and pollutant dispersion in an urban street canyon with thermal effects.(TECHNICAL PAPER)
Author: Mong-Yu Tsai
Publication: Journal of the Air & Waste Management Association (Magazine/Journal)
Date: August 1, 2005
Publisher: Thomson Gale
Volume: 55Issue: 8Page: 1178(12)

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Book Description
ULTIMATE CLEAN AIR ACT COMPLIANCE KITNow there's a complete manual for anyone concerned with volatile organic compounds and particulate matter in the air. Focusing on stationary sources (stack emissions), Atmospheric Dispersion Modeling Compliance Guide, by Karl B. Schnelle, Jr. and Partha R. Dey, gives you a framework for understanding air pollution modeling. With worked-out problems clarifying important models and concepts, this handy book/disc package is the clearest, most comprehensive and up-to-date, tool available for assuring compliance under the Clean Air Act and its amendments, and similar international regulations. You get: *Formulas for multiple sources and receptors *The Industrial Source Complex (ISC) model, puff and urban models, and boundary layer parameterizations models *Guidance on accidental emissions and chimney design *Review of harmonization of European models *Much more [CD-ROM logo - box] Included CD-ROM puts atmospheric diffusion modeling programs for dealing with real-world problems at your fingertips. ... Read more

Customer Reviews (1)

Excellent Book!! . It contains all the teory needed.
The Authors have done an excellent job putting together, compiling and sorting the teory related with dispersion modeling.
The Book is written in a clear way to let you go deep and deep on the phenomena of dispersion, and the tools (mathematicals/procedures/etc) are introduced as needed.
The CDRom is an excellent to ilustrate and validate the teory and it let you begin the simulation process in a smooth way.
Excellent Book! ... Read more

Book Description
This digital document is an article from Environmental Health Perspectives, published by Thomson Gale on August 1, 2005. The length of the article is 7234 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

Citation Details
Title: GIS-based estimation of exposure to particulate matter and N[O.sub.2] in an urban area: stochastic versus dispersion modeling.(Research)
Author: Josef Cyrys
Publication: Environmental Health Perspectives (Magazine/Journal)
Date: August 1, 2005
Publisher: Thomson Gale
Volume: 113Issue: 8Page: 987(6)

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Book Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
The prediction of spatial variation of the concentration of a pollutant governed by various sources and sinks is a complex problem. Gaussian air pollutant dispersion models such as AERMOD of the United States Environmental Protection Agency (USEPA) can be used for this purpose. AERMOD requires steady and horizontally homogeneous hourly surface and upper air meteorological observations. However, observations with such frequency are not easily available for most locations in India. To overcome this limitation, the planetary boundary layer and surface layer parameters required by AERMOD were computed using the Weather Research and Forecasting (WRF) Model (version 2.1.1) developed by the National Center for Atmospheric Research (NCAR). We have developed a preprocessor for offline coupling of WRF with AERMOD. Using this system, the dispersion of respirable particulate matter (RSPM/PM10) over Pune, India has been simulated. Data from the emissions inventory development and field-monitoring campaign (13-17 April 2005) conducted under the Pune Air Quality Management Program of the Ministry of Environment and Forests (MoEF), India and USEPA, have been used to drive and validate AERMOD. Comparison between the simulated and observed temperature and wind fields shows that WRF is capable of generating reliable meteorological inputs for AERMOD. The comparison of observed and simulated concentrations of PM10 shows that the model generally underestimates the concentrations over the city. However, data from this single case study would not be sufficient to conclude on suitability of regionally averaged meteorological parameters for driving Gaussian models like AERMOD and additional simulations with different WRF parameterizations along with an improved pollutant source data will be required for enhancing the reliability of the WRF-AERMOD modeling system. ... Read more

Book Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Fumigants, such as metam-sodium, can help control pests in the soil and improve the quality and yields for a wide range of crops. Enhanced control of field loss, or off-gassing, to the atmosphere is an important means of promoting fumigant efficacy and sound environmental management of fumigants. Metam-sodium has been used for over 40 years and is one of the most widely used fumigants in the United States. This paper describes a modeling method, the fumigant emissions modeling system (FEMS), which was developed to promote more realistic assessment of downwind concentrations in the vicinity of an applied field. Two models of the US Environmental Protection Agency, i.e., the industrial source complex short-term (ISCST3) model and the toxic modeling system short-term (TOXST) model are used, in conjunction with a pre-processing program, PCRAMMET, and the FEMS programming code to provide a Monte Carlo treatment for all key model inputs. Start times for applications are triggered on a Monte Carlo basis consistent with the annual application frequency. Typically, 1000-10,000 years of applications are simulated, outputting data to display average exceedances per year of selected concentration endpoints as a function of distance from the edge of the treatment zone. A sensitivity analysis is displayed for key meteorological variables, showing uncertainty in emission rates to be a significant input parameter. Some comparisons also are made between ambient concentrations and modeled personal and indoor exposures, showing perspective on the benefits of the indoor environment to buffer peak concentrations. ... Read more

Book Description
This digital document is an article from Journal of the Air & Waste Management Association, published by Air and Waste Management Association on March 1, 2002. The length of the article is 8571 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

Citation Details
Title: Measurement and three-dimensional modeling of airflow and pollutant dispersion in an undersea traffic tunnel. (Technical Paper).(Statistical Data Included)
Author: K.S. Chen
Publication: Journal of the Air & Waste Management Association (Refereed)
Date: March 1, 2002
Publisher: Air and Waste Management Association
Page: 349(15)

Article Type: Statistical Data Included

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Book Description
This digital document is a journal article from Building and Environment, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Researchers or engineers are paying more and more attention to personalized ventilation due to its unique features of providing satisfying thermal comfort and high indoor air quality. How the contaminants, especially the particles disperse in a personalized ventilation room is, therefore, deserved to be studied carefully, as contaminants' distribution determines indoor air quality (IAQ). In this paper, dispersion of particles with aerodynamic diameter of 0.5-10@mm in a room ventilated by a personalized ventilation system is investigated by computational fluid dynamics (CFD). A three-dimensional model is employed to model particle dispersion around a human body, as well as the airflow and temperature distribution is simulated after experimental validation. The cases of personalized ventilation, and mixing ventilation under different air supply volumes are simulated. The results show that the personalized ventilation is not always the best resolution for particle removal, as different sizes of particles could have different dispersion characteristics even under the same air supply volume by different ventilation modes. ... Read more

Book Description
This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
In this study to identify the origin of PM10 in the atmosphere of Kerman and investigate the dispersion conditions for these particles, the variations of the mass concentration and size distribution of PM10 have been measured. This study is focused on the local environmental impact of Kerman Cement Plant. All samples have been taken in the area between the plant and the city entrance at the wind direction. The result of this research shows that the PM10 concentration in the ambient air in distances about 590-1370m from the stacks is higher than the WHO guidelines of annual average (260@mg/m^3). Also, concentration of PM10 is computed by using Gaussian plume model that incorporates source related factors and meteorological factors to estimate pollutant concentration from continuous sources. The performance of this model has been compared with the measured data. ... Read more

Book Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Currently used dispersion models, such as the AMS/EPA Regulatory Model (AERMOD), process routinely available meteorological observations to construct model inputs. Thus, model estimates of concentrations depend on the availability and quality of meteorological observations, as well as the specification of surface characteristics at the observing site. We can be less reliant on these meteorological observations by using outputs from prognostic models, which are routinely run by the National Oceanic and Atmospheric Administration (NOAA). The forecast fields are available daily over a grid system that covers all of the United States. These model outputs can be readily accessed and used for dispersion applications to construct model inputs with little processing. This study examines the usefulness of these outputs through the relative performance of a dispersion model that has input requirements similar to those of AERMOD. The dispersion model was used to simulate observed tracer concentrations from a Tracer Field Study conducted in Wilmington, California in 2004 using four different sources of inputs: (1) onsite measurements; (2) National Weather Service measurements from a nearby airport; (3) readily available forecast model outputs from the Eta Model; and (4) readily available and more spatially resolved forecast model outputs from the MM5 prognostic model. The comparison of the results from these simulations indicate that comprehensive models, such as MM5 and Eta, have the potential of providing adequate meteorological inputs for currently used short-range dispersion models such as AERMOD. ... Read more

Book Description
This digital document is an article from Journal of the Air & Waste Management Association, published by Air and Waste Management Association on October 1, 2003. The length of the article is 6171 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

Citation Details
Title: Lagrangian dispersion modeling of vehicular emissions from a highway in complex terrain.(Technical Paper)
Author: Dietmar Oettl
Publication: Journal of the Air & Waste Management Association (Refereed)
Date: October 1, 2003
Publisher: Air and Waste Management Association
Volume: 53Issue: 10Page: 1233(8)

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Book Description
This digital document is an article from Journal of the Air & Waste Management Association, published by Air and Waste Management Association on April 1, 2004. The length of the article is 6015 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

Citation Details
Title: Near-field dispersion modeling for regulatory applications.(Technical Paper)
Author: Vlad Isakov
Publication: Journal of the Air & Waste Management Association (Refereed)
Date: April 1, 2004
Publisher: Air and Waste Management Association
Volume: 54Issue: 4Page: 473(10)

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