Development and Evaluation of a Simple Second Order Closure Atmospheric Dispersion Model for an Elevated Passive Release PDF Download

Author: Sandeep Sahore
Publisher:
ISBN:
Category : Air quality
Languages : en
Pages : 244

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Book Description

Author: Madhavan Ranganathan
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 230

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Book Description

Author: D. Bruce Turner
Publisher: CRC Press
ISBN: 0429612745
Category : Science
Languages : en
Pages : 183

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Book Description
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: Gandikota V. Rao
Publisher: Springer Science & Business Media
ISBN: 9783764370053
Category : Nature
Languages : en
Pages : 452

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Book Description
This volume, "Air Quality", contains many original findings on biomasss fires, transboundary pollution and associated haze and their impacts on health, biodiversity and economy and thus is expected to be a source book for research in South East Asia. Many of the results presented in this volume pertain to this region and are thus available under one ' roof.' Some papers could be discussed in graduate level classes dealing with Air Pollution, Air Quality, Cloud Physics and Biophysics. The scientific community will find this book a useful addition to their personal and institutional libraries.

Author: Karl B. Schnelle
Publisher: McGraw Hill Professional
ISBN: 9780070580596
Category : Nature
Languages : en
Pages : 560

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Book Description
CD-ROM includes: Practice problems that reinforces and deepen understanding of modeling principles.

Author: Jerry A. Havens
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 196

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Book Description

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
Atmospheric plume dispersion models are used for a variety of purposes including emergency planning and response to hazardous material releases, determining force protection actions in the event of a Weapons of Mass Destruction (WMD) attack and for locating sources of pollution. This study provides a review of previous studies that examine the accuracy of atmospheric plume dispersion models for chemical releases. It considers the principles used to derive air dispersion plume models and looks at three specific models currently in use: Aerial Location of Hazardous Atmospheres (ALOHA), Emergency Prediction Information Code (EPIcode) and Second Order Closure Integrated Puff (SCIPUFF). Results from this study indicate over-prediction bias by the EPIcode and SCIPUFF models and under-prediction bias by the ALOHA model. The experiment parameters were for near field dispersion (less than 100 meters) in low wind speed conditions (less than 2 meters per second).

Author: Michael M. Benarie
Publisher: Springer
ISBN: 1349036390
Category : Science
Languages : en
Pages : 421

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Book Description
This book brings together the methods, models and formulae used for estimating air pollution concentrations in urban areas. From the ForewordThe visible effects of pollution in most cities in the developed countries have been reduced dramatically in the past thirty years. This has been achieved to a large extent by the replacement of most of the low-level sources, which burnt raw coal, by more modern appliances using gas, electricity or low-sulphur oil. The killer smog of 1952 could not be repeated unless there were to be a massive return to old-fashioned heating methods, due, for example, to excessive environmental constraints being applied to the more modern energy sources. It is important, therefore, to judge the impact of a new source in terms of its effect on the pattern of existing sources. One should also consider the environmental consequences of rejecting the new installation and examine the alternatives--that its product may either be denied to the community at large, produced elsewhere or produced using existing facilities. These facilities are probably less efficient and may therefore produce more pollution per unit of product than the new plant would. An objective, quantitative, urban-air-pollution model is clearly an essential component in such a decision-making process. Dr. Benarie has produced a distillation of existing modelling techniques which will, I hope, become the launching pad for many future models. As each city is unique, it will need its own tailor-made model, drawing on the best and the most appropriate techniques developed previously. Agreement with observations is the only real test of validity, because the physics and chemistry are so complicated that theoretical arguments are reduced to the role of assisting in the best formulation of the problem. Numerical precision must always rely on measurement. This is the approach that Dr. Benarie has adopted.--David J. Moore, Central Electricity Research Laboratires, Leatherhead, Surrey, UK.

Author:
Publisher:
ISBN:
Category : Astrophysics
Languages : en
Pages : 494

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Book Description

Author: F. Pasquill
Publisher:
ISBN:
Category : Atmospheric circulation
Languages : en
Pages : 57

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Book Description
A brief survey is given of the present position in the specification of atmospheric dispersion parameters for use in estimating pollutant concentration from a continuous point release. The theoretical indications of the distribution to be expected across a time-mean plum are recalled, with particular reference to the existence of the Gaussian form. Observational evidence, especially as regards the vertical distribution from a surface release, is also recalled, and the practical significance of departure from an assumed Gaussian form is noted. The use of the Taylor statistical theory in the generalized estimation of crosswind spread in quasi-ideal boundary layer flow is briefly summarized. Recent considerations of the behaviour of the crosswind component of turbulence in the surface layer and new developments from laboratory modeling of horizontal dispersion in convective mixing are noted. A brief survey is given of the achievements of gradient-transfer theory and Lagrangian similarity theory in calculating vertical spread from a surface release. New tests against previous dispersion data underline inadequacies in the present approaches in very unstable conditions. Promising developments from the laboratory modeling of a convectively mixed layer and from the 2nd-order-closure modeling of the turbulent fluctuation equations are summarized. The assimulation of theory and experience into practical systems for the specification of [sigma]y and [sigma]z is briefly reconsidered. For [sigma]y a practical procedure based on wind direction fluctuation data is reaffirmed. For [sigma]z a new format which may be envisaged for future composite curves is suggested. Finally, the inherent limitations of practical systems for estimating concentration levels are reiterated.