AIR DISPERSION MODELLING

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AIR DISPERSION MODELLING

• Sinesi
• Petracchini

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Generalized process for performing a refined air
dispersion modelling assessment

• 1-Emission Estimates
• Type of Chemicals
• Emission rate
• Phase-Vapoir/Solid

• 2-Site Parameters
• Land Use
• Buildings
• Source Location
• Terrain

• 3-Met Data
• Wind Speed
• Wind Direction
• Temperature
• Mixing Height

Buildings Downwash
Terrain Processing

• Source Inputs
• Coordinates
• Rlease Height
• Exit Temp
• Exit Velocity
• Emission Rate

• Met Processing
• Stability Parameter
• Micrometeorology Parameter

AIR DISPERSION MODEL
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The AERMOD air dispersion modeling system
AERMAP
DEM file
NWS Surface
(1)
Surface file
AERMET
AERMOD
Upper Air
(1)
Profile File
On-Site
(1) From raw data files, AERMAP and AERMET
generate, the new file input to the model.
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AERMET
AERMET
Row Data
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AERMAP

• DEM file for complex terrain
• Import JPG or TIF as referenced background
• Construction of the 3D model of the city.
• Development and design of the emission sources

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MAP MANAGER TOOL
SHANGHAI AIR POLLUTANT
EMISSION MONITORING APEM PROJECT TRAINING COURSE-
ITALY 21-20-01-2007
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3D MODEL

• DEM esempi
• Sito 01 come è stato costruito immagini

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CLASS SIMULATON (1)
Emission INPUT
In the model two point sources are inserted
(Stack01 and STACK02), three buildings (BLD,
BLD2, BLD3) and two nested greed as receptors
(GRD1 and GRD2)
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CLASS SIMULATION (2)
It is run with one hour average, and 24 hours
average for one year
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CLASS SIMULATION (3)
All sources included- Results of First Highest
concentrations
1h average
Contours 50 to 2000
One year simulation
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CLASS SIMULATION (4)
All sources- First Highest concentration
1h average
Contours 50 to 2000
NB Change the meteorological period - only
January
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CLASS SIMULATION
All sources - First Highest concentration
24h average
Contour 50 to 450
One year simulation
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CLASS SIMULATION
All sources- First Highest Concentration
24h average
Contours 50 to 450
NB Change the meteorological period- only January