CANARINA:
DISPER:
SOLUTIONS: DISPER
COMMANDS:
ALGORITHMS:
EMISSIONS:
GRAPHS:
Unstable or Neutral - Crossover Between Momentum and Buoyancy
For cases with stack gas temperature greater than or equal to ambient temperature, it must be determined whether the plume rise is dominated by momentum or buoyancy. The crossover temperature difference, (DT)c, is determined as follows:
for Fb < 55,
(DT)c=0.0297 Ts(vs/ds2)1/3 (9)
and for Fb >= 55,
(DT)c=0.00575 Ts(vs2/ds)1/3 (10)
If DT, exceeds or equals (DT)c, plume rise is assumed to be buoyancy dominated, otherwise plume rise is assumed to be momentum dominated.
Unstable or Neutral - Buoyancy Rise
For situations where DT exceeds (DT)c as determined above, buoyancy is assumed to dominate. The distance to final rise, xf, is assumed to be 3.5x*, where x* is the distance at which atmospheric turbulence begins to dominate entrainment. The value of xf is calculated as follows:
for Fb < 55:
xf=49Fb5/8 (11)
and for Fb >= 55:
xf=119Fb2/5 (12)
The final effective plume height, he (m), is determined as
for Fb < 55:
he=hs+(21.425 Fb3/4/us) (13)
and for Fb = 55:
he=hs+(38.71 Fb3/5/us) (14)
Unstable or Neutral - Momentum Rise
For situations where the stack gas temperature is less than or equal to the ambient air temperature, the assumption is made that the plume rise is dominated by momentum. If DT is less than (DT)c, the assumption is also made that the plume rise is dominated by momentum. The plume height is calculated as:
he=hs+3ds(vs/us) (15)
Briggs suggests that this equation is most applicable when vs/us is greater than 4.
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: SW (225 degrees).
Pollution map (XY-Plane) produced by continuous discharge in a road region. The fucshia squares represent the road line (position of the different point sources) in a XY-Plane. The red colour represents high pollutant concentrations.
Canarina Algoritmos Numéricos, S.L.
Environmental software solutions
Software para contaminación del medio ambiente
Canary Islands, Spain
e-mail: contact us
European network on pollution · European Union
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funded by the European Commission through the
6th Framework Programme for Research and Development
air pollution statistics
CANARINA: Home - Air pollution · DISPER - Noise pollution · CUSTIC - Water pollution · DESCAR - Contact us
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.
Chester - analysis of water pollutants - handbook of environmental analysis - environmental monitoring and analysis -
Chichester - water and air pollution analysis - analysis of pollutants - environmental water analysis - air pollution standards
City of London - environmental pollution analysis - water pollution analysis - analysis of water pollution - air pollution standards
Coventry - pollution analysis - analysis of pollution - analysis of environmental pollutants - air pollution standards
Derby - human analysis - human pollution - environment pollution - air pollution standards
Derry - pollution sediment - pollution economics - effect of pollution - air pollution standards
Dundee - pollution plants - pollution chemistry - pollution book -
Durham - methods analysis - groundwater analysis - pollution models -
Edinburgh - ph analysis - analytical analysis - water quality analysis -
Ely - marine analysis - gc analysis - blood analysis - hplc analysis -
Exeter - water analysis - fish analysis - pollution poisoning - sediment analysis -
Glasgow - metal analysis - trace analysis - soil analysis - iron analysis -
Gloucester - pollution arsenic - speciation analysis - pb analysis - soils analysis -
Hereford - nickel analysis - sediments analysis - selenium analysis -
Inverness - contamination analysis - chromium analysis - arsenic analysis -
Kingston upon Hull - zinc analysis - lead analysis - copper analysis -
Lancaster - pollution accumulation - cadmium analysis - pollution lead - metals analysis -
Leeds - pollution metals - pollution zinc - toxicity analysis -
Leicester - environmental pollution - pollution soil - aquatic analysis -
Lichfield - pollution - water pollution - air pollution - air quality study
Lincoln - estimation analysis - chemical analysis - air pollution study -
Lisburn - pollution emissions - air pollution water - method analysis -
Liverpool - gc ms analysis - gc analysis - methods analysis - procedure analysis -
Manchester - data analysis - oil pollution - effects pollution -
Gloucestershire - poor indoor air quality - air quality study
Staffordshire - indoor air quality mold - indoor air quality iaq - indoor air quality certification -
Oxfordshire - maine indoor air quality - indoor air quality program -
Devon - indoor air quality system - indoor air quality specialists - california indoor air quality -
Hampshire - indoor air quality specialist - indoor air quality handbook -
North Yorkshire - indoor air pollution in developing countries - indoor air quality report -
Lincolnshire - assured indoor air quality - air quality study
Somerset - indoor air pollution control - indoor air quality market -
Norfolk - office indoor air quality - indoor air quality in office buildings - prevent indoor air pollution -
Northumberland - greenguard indoor air quality certified - skuttle indoor air quality - indoor air pollution india -
Wiltshire - indoor air quality - air quality study
Cambridgeshire - how to test indoor air quality - air quality study
Aberdeen - school indoor air quality - indoor air pollution facts - international conference on indoor air quality and climate -
Armagh - measuring indoor air quality - indoor air quality information - indoor air quality investigator -
Bangor - who indoor air pollution - indoor air quality analysis - indoor air quality systems -
Bath - what is indoor air quality - indoor air quality co2 - american indoor air quality association -
Belfast - indoor air quality schools - health canada indoor air quality - indoor air quality expert -
Birmingham - indoor air quality plan - indoor air quality services - indoor air quality measurement -
Bradford - indoor air quality consultants - indoor air quality equipment - good indoor air quality -
Brighton & Hove - reduce indoor air pollution - indoor air quality sampling - indoor air quality survey -
Bristol - indoor air quality issues - indoor air quality canada - indoor air quality tools for schools -
Cambridge - indoor air quality testing - indoor air quality association - indoor air quality standards -
Canterbury - indoor air quality in schools - indoor air quality plants - indoor air quality monitors -
Cardiff - ventilation for acceptable indoor air quality - indoor air quality monitor - improve indoor air quality -
Carlisle - american indoor air quality - american indoor air quality council - indoor air quality monitoring -
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