Potential of air pollution increases when the ventilation

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Potential of air pollution increases when the ventilation coefficient is

1. > 11,000 m2/s
2. > 7,600 m2/s
3. < 3,600 m2/s
4. < 6,000 m2/s

Correct Option: D

The product of the maximum mixing depth and the average wind speed within the mixing depth is sometimes used as an indicator of the atmosphere’s dispersive capability. This product is known as the ventilation coefficient (m²/s). Values of ventilation coefficient less than about 6000 m²/s are considered indicative of high air pollution potential (Portelli and Lewis, 1987).