AERMOD Modeling System Photo: Ralph Turcotte presentation by: Larry L. Simmons May 23, 2006

Implementation Schedule

Why AERMOD ? AERMOD implements a sophisticated terrain impact solution that eliminates the need for simple, intermediate and complex terrain receptor post-processing AERMOD implements a sophisticated terrain impact solution that eliminates the need for simple, intermediate and complex terrain receptor post-processing AERMOD implements the PRIME building downwash procedure as its default downwash configuration AERMOD implements the PRIME building downwash procedure as its default downwash configuration

What is AERMOD System ?  AERMAP – Terrain processor for receptor definition  AERMET – Meteorological Data Processor  AERMOD – Full Dispersion Model  AERSCREEN – Screening Model

AERMAP  Utilizes USGS 7.5 Minute DEM files  Calculates an elevation for each receptor  Calculates a terrain streamline function for each receptor

Example Terrain Problem

Example Receptor File

AERMET – Tower Data

AERMET – SODAR Data

AERSURFACE – Example

AERMET – Profile

My Experience with AERMOD  Reduces Short - Term Property Line / Fence Line impacts from 0 to 30 percent  Increases Long – Term Property Line / Fence Line impacts from 0 to 15 percent  Reduces elevated terrain receptor impacts significantly

Further Development  AERSURFACE release to public this spring  AERSCREEN release to public this spring  Debug – Debug – Debug