2.1. Simplification of the Equation

Try these first

1. 1.

   Define the steady state assumption.

   Hint

   Think about how this simplifies our equations.

2. 2.

   What is bulk flow?

   Hint

   Consider how this impacts our dispersion model.

3. 3.

   What does the steady-state assumption imply about pollutant concentration?

   • It changes over time
   • It remains constant over time
   • It varies with location

   Hint

   Focus on the definition of steady state.

4. 4.

   True or False: The Gaussian distribution is used to describe the spread of pollutant concentration.

   • True
   • False

   Hint

   Think about the bell curve.

5. 5.

   If a pollutant is released erratically rather than steadily, how would you revise the dispersion equation?

   Hint

   Consider how transient effects differ from steady-state.

6. 6.

   Calculate the maximum expected concentration of a pollutant in a Gaussian plume given a specific emission rate and wind speed.

   Hint

   Remember that the peak typically correlates with the source height.