AERMOD AERMOD A Regulatory Model to be Used for Permitting and - PowerPoint PPT Presentation

AERMOD

AERMOD – A Regulatory Model to be Used for Permitting and Compliance  AERMOD Modelling System: A steady-state plume model that incorporates air dispersion to find concentration of pollutants at various receptors.  This makes our work easier in the field of Air Quality Modelling .

Basic Inputs needed to run AERMOD We need four (4) files to run AERMOD  Input file which consists of source location, receptor locations, and output options.  AERMOD Application (Executable file)  Meteorological data: AERMOD requires two types of meteorological data files, that are provided by the AERMET meteorological preprocessor program (EPA, 2004b).  One file with surface scalar parameters (Surface MET data file)  Other file consists of vertical profiles of meteorological data (Profile MET data file)

Number of Individual Calculations Involved  # of Sources – 10  # of Receptors – 1000  # of Meteorological conditions (5 year ) – 5 * 365 days * 24h/day = 43,800  Total Number of calculations – 10 * 1000 * 43,800  438,000,0000 (438 Million individual calculations)

Combining the Individual Calculations to Get Some Answers  Source Groups (e.g., Distribution Out of the 10 Discussed Above)  3 – Coke Ovens  3 – Blast Furnace  4 – Others  Averaging Times (e.g., Monthly; or 30-Day Rolling Averages)  Jan 1-31; Feb 1-28; Etc.  Jan 15 – Feb 13 (30-Day); April 15 – May 14 (30-Day)  Highest or 2 nd Highest at each Receptor (Raw Calculations for 1-hr Averaging Only)  43,800 individual values at each receptor

Output Options The basic types of printed output available with AERMOD are:  Summaries of high values (highest, second highest, etc.) at receptor for each averaging period and source group combination  Summaries of overall maximum values (e.g., the maximum 50) for each averaging period and source group combination;  Top 50 Values among 438,000,000 calculcations

How to Run AERMOD  Make sure that all the four files (AERMOD application, Input File, Profile MET data file, Surface MET data file) are in the same folder.  Go to command prompt and give the path of the folder by using change directory(cd).  Example: The location of my folder is C:\Users\Paleti\Desktop  In command prompt,

Before Running AERMOD

After Running AERMOD

Profile MET data file While running for 24 hours

Profile MET data file While running for 24 hours