HYPACT
Hybrid Particle And Concentration Transport Model
HYPACT is used to simulate
the dispersion of air pollutants in a 3-D, mesoscale,
time dependent wind
and turbulence fields. HYPACT allows assessment of the impact of
one or multiple
sources emitted into highly complex local weather regimes,
including mountain/valley
and complex terrain flows, land/sea breezes, urban areas,
and other situations in
which the traditional Gaussian-plume based models are know to fail.
HYPACT combines
the best features of grid-based Eulerian dispersion methodologies with
Lagrangian particle dispersion modeling.