Draw tekan.2 (1) Hote) copf (] +exp o Highlight b. the rate of release does not have a large effect on the downwind concentrations c. it is always better not to release anything d. the results are always the same independent of the dispersion model selected. B. Dispersion of plume with a continuous steady-state source at height Habove ground level and wind moving in x-direction at constant velocity u is given by Eqn. (5-49), Case 13 (Textbook, 3a ed.) (c)(x,y,z) 2. 2+H -exp 20,0 (5-49) where, (C) is average concentration at point (x.y,z) Q. is mass release rate of gas (mass/time) 0,0, are the y and : dispersion coefficient u is the wind speed (length/time) x is the downwind direction y is the crosswind direction z is the height above the ground He is the release height (length) Now consider an incinerator located in rural area has a stack height of 45 m. On a bright sunny day with a 4.5 m/s wind speed, the concentration of sulfur dioxide (SO) 2 km directly downwind on the ground is measured at 5.5x10gm/m'. a. Show how Equation (5-49) is simplified for the downwind centerline concentration, (C)(x,0,0).. b. Estimate the total release rate of sulfur dioxide (in gm/s) from this stack. Assume rural conditions. Data for sulfur dioxide (SO2): Molecular weight: 64 2 Page