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Advances In Analytical And Numerical Dispersion Modeling Of Pollutants Releasing From An Area Source
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Book Synopsis Advances in Analytical and Numerical Dispersion Modeling of Pollutants Releasing from an Area-source by : Praneeth Nimmatoori
Download or read book Advances in Analytical and Numerical Dispersion Modeling of Pollutants Releasing from an Area-source written by Praneeth Nimmatoori and published by . This book was released on 2014 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: The air quality near agricultural activities such as tilling, plowing, harvesting, and manure application is of main concern because they release fine particulate matter into the atmosphere. These releases are modeled as area-sources in the air quality modeling research. None of the currently available dispersion models relate and incorporate physical characteristics and meteorological conditions for modeling the dispersion and deposition of particulates emitting from such area-sources. This knowledge gap was addressed by developing the advanced analytical and numerical methods for modeling the dispersion of particulate matter. The development, application, and evaluation of new dispersion modeling methods are discussed in detail in this dissertation. In the analytical modeling, a ground-level area source analytical dispersion model known as particulate matter deposition - PMD was developed for predicting the concentrations of different particle sizes. Both the particle dynamics (particle physical characteristics) and meteorological conditions which have significant effect on the dispersion of particulates were related and incorporated in the PMD model using the formulations of particle gravitational settling and dry deposition velocities. The modeled particle size concentrations of the PMD model were evaluated statistically after applying it to particulates released from a biosolid applied agricultural field. The evaluation of the PMD model using the statistical criteria concluded effective and successful inclusion of dry deposition theory for modeling particulate matter concentrations. A comprehensive review of analytical area-source dispersion models, which do not account for dry deposition and treat pollutants as gases, was conducted and determined three models - the Shear, the Parker, and the Smith. A statistical evaluation of these dispersion models was conducted after applying them to two different field data sets and the statistical results concluded that the Shear model performed the best out of the three dispersion models. The algorithms of each dispersion model were analyzed and it was determined that the best performance of the Shear model was due to incorporation of a variation of wind speed and vertical eddy diffusivity (atmospheric turbulence) with the height above ground surface. A new methodology was developed using computational fluid dynamics (CFD) - FLUENT for the numerical dispersion modeling of particulate matter emitting from an area-source (biosolids applied agricultural field). The discrete phase model (Lagrangian -Eulerian approach) was used in combination with each of the four turbulence models: Standard ke (ke), Realizable ke (Rke), Standard k¿ (k¿), and Shear-stress transport k-¿ (SST) to predict particulate matter size concentrations for distances downwind of the agricultural field. In this modeling approach, particulates were simulated as discrete phase and air as continuous phase. The discrete phase model accounted for the effects of atmospheric turbulence and drag force which is dependent on particle physical characteristics (diameter, density, and velocity), gravitational velocity, and air viscosity for predicting the trajectories of particles. The modeled particulate matter concentrations were compared statistically with their corresponding field study observations to evaluate the performance of proposed CFD model using the four turbulence models. The statistical analysis concluded that among four turbulence models, the discrete phase model when used with Rke performed the best in predicting particulate matter concentrations for low (u 2 m/s) and medium (2
Book Synopsis Advances in Air Pollution Modeling for Environmental Security by : István Faragó
Download or read book Advances in Air Pollution Modeling for Environmental Security written by István Faragó and published by Springer Science & Business Media. This book was released on 2005-07-14 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: The protection of our environment is one of the major problems in the society. More and more important physical and chemical mechanisms are to be added to the air pollution models. Moreover, new reliable and robust control strategies for keeping the pollution caused by harmful compounds under certain safe levels have to be developed and used in a routine way. Well based and correctly analyzed large mathematical models can successfully be used to solve this task. The use of such models leads to the treatment of huge computational tasks. The efficient solution of such problems requires combined research from specialists working in different fields. The aim of the NATO Advanced Research Workshop (NATO ARW) entitled “Advances in Air Pollution Modeling for Environmental Security” was to invite specialists from all areas related to large-scale air pollution modeling and to exchange information and plans for future actions towards improving the reliability and the scope of application of the existing air pollution models and tools. This ARW was planned to be an interdisciplinary event, which provided a forum for discussions between physicists, meteorologists, chemists, computer scientists and specialists in numerical analysis about different ways for improving the performance and the quality of the results of different air pollution models.
Book Synopsis Mathematical Models for Atmospheric Pollutants by : R. L. Drake
Download or read book Mathematical Models for Atmospheric Pollutants written by R. L. Drake and published by . This book was released on 1979 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Specialty Conference On: Dispersion Modeling from Complex Sources by : Edward R. Frederick
Download or read book A Specialty Conference On: Dispersion Modeling from Complex Sources written by Edward R. Frederick and published by . This book was released on 1981 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Air Pollution Modeling and Its Application VII by : Han Van Dop
Download or read book Air Pollution Modeling and Its Application VII written by Han Van Dop and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 607 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air pollution remains a major environmental issue despite many years of study and much legislative control. In rec~nt times, pollution on a global scale has become of particular concern. The gradually changing con centration of trace gases in the global troposphere due to man's activity is becomming a matter of serious concern. No scientist would dare to pre dict in detail the consequences of this gradual change due to its immense complexity involving social and economic factors and near countless chemical and phjsical cycles in our biosphere. In this chain of processes, the transport of pollution is an important factor, but only a factor. Therefore, I would like to emphasize that the mOdelling of atmospheric transport is becoming more and more an activity which fits into larger frameworks and can no longer be exercised as a single step, which bridges the gap between emissions and policy measures. This is also reflected in the topics and papers which were presented at this conference. The topics were: - emission invetories for and source treatment in air pollution dispersion models; - modelling of accidental releases; - regional and global scale dispersion mOdelling; including boundary layer-free troposphere exchange processes and subgrid scale parameter isations; - model verification and policy implications; - new developments in dispersion modelling and theory. 56 papers were presented in these sections. While many posters were dis cussed in a special session.
Book Synopsis Air Pollution Modeling by : P. Zannetti
Download or read book Air Pollution Modeling written by P. Zannetti and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finishing this book is giving me a mixture of relief, satisfaction and frus tration. Relief, for the completion of a project that has taken too many of my evenings and weekends and that, in the last several months, has become almost an obsession. Satisfaction, for the optimistic feeling that this book, in spite of its many shortcomings and imbalances, will be of some help to the air pollution scientific community. Frustration, for the impossibility of incorporating newly available material that would require another major review of several key chap ters - an effort that is currently beyond my energies but not beyond my desires. The first canovaccio of this book came out in 1980 when I was invited by Computational Mechanics in the United Kingdom to give my first Air Pollution Modeling course. The course material, in the form of transparencies, expanded, year after year, thus providing a growing working basis. In 1985, the ECC Joint Research Center in Ispra, Italy, asked me to prepare a critical survey of mathe matical models of atmospheric pollution, transport and deposition. This support gave me the opportunity to prepare a sort of "first draft" of the book, which I expanded in the following years.
Book Synopsis Air Pollution Modeling and Its Application XVI by : Carlos Borrego
Download or read book Air Pollution Modeling and Its Application XVI written by Carlos Borrego and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 633 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume covers the latest scientific developments in the real world applications of pollution modeling. Topics covered include: the role of atmospheric models in air pollution policy and abatement strategies; integrated regional modelling; global and long-range transport; aerosols as atmospheric contaminants; model assessment and verification; and application of new concepts in different regions of the world.
Book Synopsis Regional Scale Dispersion Modeling and Analysis of Directly Emitted Fine Particulate Matter from Mobile Source Pollutants Using AERMOD by : Seth Daniel Contreras
Download or read book Regional Scale Dispersion Modeling and Analysis of Directly Emitted Fine Particulate Matter from Mobile Source Pollutants Using AERMOD written by Seth Daniel Contreras and published by . This book was released on 2015 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: A large and growing body of literature associates proximity to major roadways with increased risk of many negative health outcomes and suggests that exposure to fine particulate matter may be a substantial factor. Directly emitted and non-reactive mobile source air pollutants such as directly emitted fine particulate matter can form large spatial concentration gradients along major roadways, in addition to causing significantly large temporal and seasonal variation in air pollutant concentrations within urban areas. Current modeling and regulatory approaches for minimizing exposure have limited spatial resolution and do not fully exploit the available data. The objective is to establish a methodology for quantifying fine particulate matter concentration gradients due to mobile source pollutants and to estimate the resulting population exposure at a regional scale. A novel air dispersion modeling framework is proposed using the Environmental Protection Agency's regulatory model AERMOD with data from a regional travel demand model that can produce a high resolution concentration surface for a considerably large metropolitan area; in our case, Los Angeles County, California. We find that PM2.5 concentrations are highest and most widespread during the morning and evening commutes, particularly during the winter months. This is likely caused by a combination of stable atmospheric conditions during the early morning and after sunset in the evening and higher traffic volumes during the morning and evening commutes. During the midday hours concentrations are at their lowest even though traffic volumes are still much higher than during the evening. This is likely the result of heating during the day time which leads to unstable atmospheric conditions that cause more vertical mixing and lateral dispersion, reducing ground level PM2.5 concentrations by transport and dilution. With respect to roadway centerlines, PM2.5 concentrations drop off quickly, reaching relatively low concentrations between 150m to 200m from the center line of high volume roads. However, during stable atmospheric conditions (e.g., nighttime & winter season) concentrations remain elevated at distances up to 1,000m from roadway centerlines. We will demonstrate the feasibility of our methodology and how integrating the dispersion modeling framework into the travel demand modeling process routinely performed when developing and analyzing regional transportation improvement initiatives can lead to more environmentally and financially sustainable transportation plans. Regional strategies that minimize exposure, rather than inventories, could be established, environmental justice concerns are easily identified, and projects likely to cause local pollution "hotspots" can be proactively screened out, saving time and money for the transportation agency.
Book Synopsis Atmospheric Dispersion Modeling Compliance Guide by : Karl B. Schnelle
Download or read book Atmospheric Dispersion Modeling Compliance Guide written by Karl B. Schnelle and published by McGraw Hill Professional. This book was released on 2000 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: CD-ROM includes: Practice problems that reinforces and deepen understanding of modeling principles.
Book Synopsis Statistical Analysis of Air Pollutants and Numerical Modeling of Reactive Pollutant Dispersion Within Street Canyon by : Yun-On Tong
Download or read book Statistical Analysis of Air Pollutants and Numerical Modeling of Reactive Pollutant Dispersion Within Street Canyon written by Yun-On Tong and published by Open Dissertation Press. This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Statistical Analysis of Air Pollutants and Numerical Modeling of Reactive Pollutant Dispersion Within Street Canyon" by Yun-on, Tong, 唐潤安, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b4660703 Subjects: Air - Pollution - Mathematical models Dispersion
Book Synopsis Workbook of Atmospheric Dispersion Estimates by : D. Bruce Turner
Download or read book Workbook of Atmospheric Dispersion Estimates written by D. Bruce Turner and published by CRC Press. This book was released on 2020-12-17 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: This completely updated and revised Second Edition of the popular Workbook of Atmospheric Dispersion Estimates provides an important foundation for understanding dispersion modeling as it is being practiced today. The book and accompanying diskette will help you determine the impacts of various sources of air pollution, including the effects of wind and turbulence, plume rise, and Gaussian dispersion and its limitations. Information is shown in summary graphs as well as in equations. The programs included on the diskette allow you to "get the feel" for the results you'll obtain through the input of various combinations of parameter values. The sensitivity of data to various parameters can be easily explored by changing one value and seeing the effect on the results. The book presents 37 example problems with solutions to show the estimation of atmospheric pollutant concentrations for many situations.
Author :Sponsored by The Health Effects Institute Publisher :National Academies Press ISBN 13 :0309037263 Total Pages :703 pages Book Rating :4.3/5 (9 download)
Book Synopsis Air Pollution, the Automobile, and Public Health by : Sponsored by The Health Effects Institute
Download or read book Air Pollution, the Automobile, and Public Health written by Sponsored by The Health Effects Institute and published by National Academies Press. This book was released on 1988-01-01 with total page 703 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The combination of scientific and institutional integrity represented by this book is unusual. It should be a model for future endeavors to help quantify environmental risk as a basis for good decisionmaking." â€"William D. Ruckelshaus, from the foreword. This volume, prepared under the auspices of the Health Effects Institute, an independent research organization created and funded jointly by the Environmental Protection Agency and the automobile industry, brings together experts on atmospheric exposure and on the biological effects of toxic substances to examine what is knownâ€"and not knownâ€"about the human health risks of automotive emissions.
Book Synopsis Back-calculating Emission Rates for Ammonia and Particulate Matter from Area Sources Using Dispersion Modeling by : Jacqueline Elaine Price
Download or read book Back-calculating Emission Rates for Ammonia and Particulate Matter from Area Sources Using Dispersion Modeling written by Jacqueline Elaine Price and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Engineering directly impacts current and future regulatory policy decisions. The foundation of air pollution control and air pollution dispersion modeling lies in the math, chemistry, and physics of the environment. Therefore, regulatory decision making must rely upon sound science and engineering as the core of appropriate policy making (objective analysis in lieu of subjective opinion). This research evaluated particulate matter and ammonia concentration data as well as two modeling methods, a backward Lagrangian stochastic model and a Gaussian plume dispersion model. This analysis assessed the uncertainty surrounding each sampling procedure in order to gain a better understanding of the uncertainty in the final emission rate calculation (a basis for federal regulation), and it assessed the differences between emission rates generated using two different dispersion models. First, this research evaluated the uncertainty encompassing the gravimetric sampling of particulate matter and the passive ammonia sampling technique at an animal feeding operation. Future research will be to further determine the wind velocity profile as well as determining the vertical temperature gradient during the modeling time period. This information will help quantify the uncertainty of the meteorological model inputs into the dispersion model, which will aid in understanding the propagated uncertainty in the dispersion modeling outputs. Next, an evaluation of the emission rates generated by both the Industrial Source Complex (Gaussian) model and the WindTrax (backward-Lagrangian stochastic) model revealed that the calculated emission concentrations from each model using the average emission rate generated by the model are extremely close in value. However, the average emission rates calculated by the models vary by a factor of 10. This is extremely troubling. In conclusion, current and future sources are regulated based on emission rate data from previous time periods. Emission factors are published for regulation of various sources, and these emission factors are derived based upon back-calculated model emission rates and site management practices. Thus, this factor of 10 ratio in the emission rates could prove troubling in terms of regulation if the model that the emission rate is back-calculated from is not used as the model to predict a future downwind pollutant concentration.
Book Synopsis Advanced Air Pollution by : Farhad Nejadkoorki
Download or read book Advanced Air Pollution written by Farhad Nejadkoorki and published by BoD – Books on Demand. This book was released on 2011-08-17 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leading air quality professionals describe different aspects of air pollution. The book presents information on four broad areas of interest in the air pollution field; the air pollution monitoring; air quality modeling; the GIS techniques to manage air quality; the new approaches to manage air quality. This book fulfills the need on the latest concepts of air pollution science and provides comprehensive information on all relevant components relating to air pollution issues in urban areas and industries. The book is suitable for a variety of scientists who wish to follow application of the theory in practice in air pollution. Known for its broad case studies, the book emphasizes an insightful of the connection between sources and control of air pollution, rather than being a simple manual on the subject.
Book Synopsis Advances in Modeling of Fluid Dynamics by : Chaoqun Liu
Download or read book Advances in Modeling of Fluid Dynamics written by Chaoqun Liu and published by BoD – Books on Demand. This book was released on 2012-11-07 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains twelve chapters detailing significant advances and applications in fluid dynamics modeling with focus on biomedical, bioengineering, chemical, civil and environmental engineering, aeronautics, astronautics, and automotive. We hope this book can be a useful resource to scientists and engineers who are interested in fundamentals and applications of fluid dynamics.
Book Synopsis Advances in Air Pollution Modeling for Environmental Security by : István Faragó
Download or read book Advances in Air Pollution Modeling for Environmental Security written by István Faragó and published by Springer. This book was released on 2009-09-03 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: The protection of our environment is one of the major problems in the society. More and more important physical and chemical mechanisms are to be added to the air pollution models. Moreover, new reliable and robust control strategies for keeping the pollution caused by harmful compounds under certain safe levels have to be developed and used in a routine way. Well based and correctly analyzed large mathematical models can successfully be used to solve this task. The use of such models leads to the treatment of huge computational tasks. The efficient solution of such problems requires combined research from specialists working in different fields. The aim of the NATO Advanced Research Workshop (NATO ARW) entitled “Advances in Air Pollution Modeling for Environmental Security” was to invite specialists from all areas related to large-scale air pollution modeling and to exchange information and plans for future actions towards improving the reliability and the scope of application of the existing air pollution models and tools. This ARW was planned to be an interdisciplinary event, which provided a forum for discussions between physicists, meteorologists, chemists, computer scientists and specialists in numerical analysis about different ways for improving the performance and the quality of the results of different air pollution models.
Book Synopsis Proceedings of Symposium on Multiple-Source Urban Diffusion Models by :
Download or read book Proceedings of Symposium on Multiple-Source Urban Diffusion Models written by and published by . This book was released on 1970 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
