Study on AERMOD Model Application to Complex Terrain Effect in Taiwan
Date Issued
2010
Date
2010
Author(s)
Lin, Chih-Po
Abstract
AERMOD (AMS/EPA Regulatory Model) was officially
promulgated as the U.S. EPA preferred dispersion model for industrial
point sources on 2005. AERMOD’s model formulation contains many
changes over its predecessor, ISC (Industrial Source Complex Model). As
plume transport is handled differently in AERMOD than the COMPLEX
portion of ISC. Calculating the dividing streamline height at receptor
within a domain and determining whether a plume will rise over or
diverge around it. On this study, both models are simulating the complex
terrain effects and the applicability of AERMOD in Taiwan.
First of all, the comparison theory of two air quality models, such as
atmospheric stability, mixing layer height and sensitivity analysis of
surface characteristics. Second, the simulation of power plant cases on
complex terrain. The result: the maximum concentration often occurs on
the higher ground level. It’s expected that the AERMOD results most of
predicted lower concentrations than ISC. The differences between the two
models tended to increase with averaging time, the largest differences
were in the annual average. In testing the allowable pollutant increase
limits (APIL), the amount of concentration is better less than regulatory
standards by the AERMOD tested.
Finally, the Monitoring station near the power plant as a receptor
simulation and compared with the observed, due to the mixing layer
height at night than the effective stack height is low. Comparing the two
models during the daytime simulation of concentration and observed
value relevance. But AERMOD model considers the computing three
plume treatment of the convective boundary layer (CBL), the
concentration distribution close to observed value than the ISC.
Subjects
Complex terrain
Mixing layer height
Monitoring Station
Allowance pollutant increase limits
Type
thesis
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