In Gaussian plume notation, what does x represent?

In Gaussian plume notation, what does x represent?

• A. Height above ground
• B. Wind direction angle
• C. Downwind distance from the source
• D. Time since release

Answer: (C)

In Gaussian plume notation, the x axis represents the distance downstream from the source along the wind direction—that is, how far the plume has traveled with the wind. The crosswind spread is described by y (perpendicular to the wind) and the vertical height by z (above ground). Time since release isn’t a spatial axis in the standard steady-state plume equations. So the correct interpretation is the downwind distance from the source.

In Gaussian plume notation, the x axis represents the distance downstream from the source along the wind direction—that is, how far the plume has traveled with the wind. The crosswind spread is described by y (perpendicular to the wind) and the vertical height by z (above ground). Time since release isn’t a spatial axis in the standard steady-state plume equations. So the correct interpretation is the downwind distance from the source.