air quality dispersion modeling

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The Decay Term (D)

The Decay Term is a simple method of accounting for pollutant removal by physical or chemical processes. It is of the form:

D=exp(-psi x/u_s) for psi > 0 (36)

D=0 for psi = 0 (37)

where:

psi= the decay coefficient (s^-1) (a value of zero means decay is not considered)

x= downwind distance (m)

For example, if T_1/2 is the pollutant half life in seconds, the user can obtain y from the relationship:

psi=0.693/T_1/2 (38)

The default value for psi is zero. That is, decay is not considered in the model calculations unless y is specified. However, a decay half life of 4 hours (y = 0.0000481 s^-1) corresponds to SO₂ when modeled.

Algorithms I - Algorithms II - Algorithms III - Algorithms IV - Algorithms V - Algorithms VI - Algorithms VII - Algorithms VIII - Algorithms IX - Algorithms X

Air pollution map (XY-Plane) produced by continuous discharge in time (three stacks). The red colour represents high pollutant concentrations. Wind: W (270 degrees).

Air pollution map (XY-Plane) produced by continuous discharge in time. The fucshia lines represents a stacks in the XY-Plane. The red colour represents high pollutant concentrations. Winds: NE (45 dregrees) and 145 degrees.

Canarina Algoritmos Numéricos, S.L.

Environmental software solutions

Software para impacto del medio ambiente

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industrial air pollution

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DISPER: Air pollution dispersion · DISPER - Solutions - Data - Algorithms - Emissions - Graphs - ISC3 (VOL. 2)

SOLUTIONS: Air pollution dispersion · DISPER - Software solutions - Software advantages - Price - DEMO download

COMMANDS: Input data I - Input data II - Input data III - Input data IV - Temporal average - Import and export data - Software commands

ALGORITHMS: Algorithms I - Algorithms II - Algorithms III - Algorithms IV - Algorithms V - Algorithms VI - Algorithms VII - Algorithms VIII - Algorithms IX - Algorithms X

EMISSIONS: Emissions I - Emissions II - Emissions III - Pollutants I - Pollutants II

GRAPHS: Graphs I - Graphs II - Graphs III - Graphs IV

DISPER software solutions: This application has been used in great number of environmental reports, air pollution courses and air pollution studies in the last years. We currently have users in more than 10 countries.

Nottingham - air industrial - emission pollutants - gasoline emission -

Oxford - emission nox - industrial air pollution

Peterborough - air major - fuel emission - emission standards -

Plymouth - air regulations - air regulation - atmospheric emission -

North Yorkshire - air emission - air emissions - flights emissions -

Devon - air particulates - air particles - control air -

Lincolnshire - air pollutant - air industry - pm emission -

Portsmouth - air effects - air inventory - industrial air pollution

Preston - smog emission - air concentration - air combustion -

Ripon - nitrogen emission - air traffic - air standards -

Salford - carbon emission - air report - air nox - industrial air pollution

Bath - air quality control - air quality management - air quality standards -

Belfast - air quality testing - air quality index - air quality monitoring -

Birmingham - carbon dioxide air quality modeling - air quality - indoor air quality -

Bradford - pm10 air quality modeling - atmospheric - particulate matter air quality modeling -

Brighton & Hove - SOx air quality dispersion modeling - PM air quality dispersion modeling - iscst type simulation -

Bristol - HNO3 air quality dispersion modeling - NOx air quality dispersion modeling - Cl2 air quality dispersion modeling -

Cambridge - NH3 air quality dispersion modeling - industrial air pollution

Canterbury - us air quality - improve air quality - air pollution issues -

Cardiff - preventing air pollution - air quality engineering - health effects of air pollution -

Carlisle - outdoor air quality - air pollution data - air pollution cause - industrial air pollution

Chester - air pollution sources - air quality standard - pollution in the air -

Chichester - city air quality - facts about air pollution - air quality solutions -

City of London - air quality consultants - air pollution act - air pollution effect -

Coventry - CO2 air quality modeling - chlorofluorocarbons air quality modeling - acid raid air quality modeling -

Derby - NH3 air quality dispersion modeling - HNO3 air quality dispersion modeling - NOx air quality dispersion modeling -

Derry - Cl2 air quality dispersion modeling - SOx air quality dispersion modeling - PM air quality dispersion modeling -

Lisburn - air quality model study - air quality modeling near roads study - air quality report in schools -

Swansea - HNO3 air quality dispersion modeling - formaldehyde air quality modeling -

Truro - acid rain air quality modeling - ISCST3 type modelization - air quality strategy -

Wakefield - industrial air pollution - air quality data - urban air pollution -

Wells - air quality act - worst air pollution - air pollution articles -

Copyright © 2005 Canarina Algoritmos Numéricos, Sociedad Limitada Unipersonal CIF-B38803110 registered for electronic commerce in sheet TF-35526, sheet 1 of the volume 2.671 of the General Section, First Registration, Registro de la Propiedad Número 2 y Marcantil of , Spain. All rights reserved.