AirWare On-line Reference Manual
| Release Level | 5.3.0 beta |
| Release Date | 2007 06 |
Revision Level | 1.1 |
AERMOD implementation
AERMOD is a steady-state Gaussian plume model(a regulatory EPA model) ,
but uses concepts of bounday layer physics for
the estimation of its (continuous) dispersion parameters.
The model is always run for a day in 24 hourly time steps,
or for an entire year with 365*24 hourly results.
In AirWare, AERMOD is used for:
- Scheduled runs: Hourly nowcasts for the urban sub-domain and
(optional) 24 hour forecast runs (currently not implemented);
- Interactive scenario analysis
for all sources in a domain, 24 houyrly runs;
- Computational kernel for the
traffic convolution model, 24 hourly results;
the computational kernel
can be used both for individual road segments, or entire domains,
transparently integrated with the point and area source modelling.
- Monitoring stations location (annual runs around a point emission source);
- impact assessment (annual runs at an hourly basis) for individual point sources;
AERMOD is used together with the AERMET
meteorological pre-processor, and uses a common display page for
detailed model results.
Scheduled model runs
These are linked from the main AirWare start menu (Hourly Nowcast,
optionally also from Daily Forecast), including, for example,
- NOX (AERMOD)
- SO2 (AERMOD)
for NOx and SO2 scenarios for any and all subdomains covered by the
CAMx nested grid model, respectively.
Each link leads to a selector for the set of domains configured for these runs.
The set of nowcast runs define by
- model domains,
- substances,
- excution times.
Interactive scenarios
Interactive scenarios, each covering 24 hours, are retrived from a list of named scenarios.
The listing also indicates the status of the scenario:
- GREENE: scenario completed, results available for display and analysis;
- RED: model currently running, scenario locked for editing;
- BLUE: scenario has been edited, ready to tun.
In addition to the choice of
the user can set the values for albedo, roughness length, and Bowen ratio.
