Sulphur dioxide is emitted at a rate of 2kg/s from the top of a chimney that is 120m high.
The plume initially rises vertically a further 10m above the chimney exit, before being convected horizontally by a wind speed of 15m/s under atmospheric stability type C.
The surrounding terrain is flat with a roughness length zo of 0.01m. Calculate;
(a) The concentration (kg/m³) on the plume centre-line at a distance of 800m downwind of the chimney.