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AIR DISPERSION MODELLING

AIR DISPERSION MODELLING. Sinesi Petracchini. Receptor Definition Grid Discrete Elevation. Analysis of results Contouring/Plot Percentiles Thresholds. Generalized process for performing a refined air dispersion modelling assessment. 1-Emission Estimates Type of Chemicals

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AIR DISPERSION MODELLING

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  1. AIR DISPERSION MODELLING Sinesi Petracchini

  2. Receptor Definition • Grid • Discrete • Elevation • Analysis of results • Contouring/Plot • Percentiles • Thresholds 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

  3. 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.

  4. AERMET AERMET Row Data

  5. 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

  6. MAP MANAGER TOOL SHANGHAI AIR POLLUTANT EMISSION MONITORINGAPEM PROJECT TRAINING COURSE- ITALY 21-20-01-2007

  7. 3D MODEL • DEM esempi • Sito 01 come è stato costruito immagini

  8. CLASS SIMULATON (1) 25.15 11.5 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)

  9. CLASS SIMULATION (2) It is run with one hour average, and 24 hours average for one year

  10. CLASS SIMULATION (3) All sources included- Results of First Highest concentrations 1h average Contours 50 to 2000 One year simulation

  11. CLASS SIMULATION (4) All sources- First Highest concentration 1h average Contours 50 to 2000 NB: Change the meteorological period - only January

  12. CLASS SIMULATION All sources - First Highest concentration 24h average Contour 50 to 450 One year simulation

  13. CLASS SIMULATION All sources- First Highest Concentration 24h average Contours 50 to 450 NB: Change the meteorological period- only January

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