Air Quality Modelling: Gaussian Plume Model - Examrace (Dr. Manishika) Env. Air Pollution

Dr. Manishika Jain explains Air Quality Modelling: Gaussian Plume Model

• Steady-state conditions - rate of emission from the point source is constant.
• Homogeneous flow - wind speed is constant both in time and with height (wind direction shear is not considered).
• Pollutant is conservative and no gravity fallout.
• Perfect reflection of the plume at the underlying surface, i.e. no ground absorption.
• The turbulent diffusion in the x-direction is neglected relative to advection in the transport direction, which implies that the model should be applied for average wind speeds of more than 1 m/s (less than 1 m/s).
• The coordinate system is directed with its x-axis into the direction of the flow, and the v (lateral) and w (vertical) components of the time averaged wind vector are set to zero.
• The terrain underlying the plume is flat
• All variables are ensemble averaged, which implies long-term averaging with stationary conditions.

Source of Pollution can be Point (vent), area (pond) or volume (conveyor) @0:20
Input Data Required for Air Quality Modelling @1:27
Types of Air Quality Modelling @2:19
Gaussian Plume Model @2:48
Steady – State Conditions @6:15
Homogeneous Flow @6:20
Plume Rise @13:48
Momentum Flux (F_m) @14:59
Buoyancy Plumes @15:27
#Plume #Neglected #Turbulent #Homogeneous #Quality #Modelling #Emission #Mathematical #Pollution #Manishika #Examrace
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Dr. Manishika Jain served as visiting professor at Gujarat University. Earlier she was serving in the Planning Department, City of Hillsboro, Hillsboro, Oregon, USA with focus on application of GIS for Downtown Development and Renewal. She completed her fellowship in Community-focused Urban Development from Colorado State University, Colorado, USA.

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