Profile relationships based on Monin-Obukhov similarity theory have been used to compute, turbulence parameters, viz., friction velocity, u., and friction temperature, 0*., at the surface with available routine meteorological observations for the city of Delhi during day time. In order to make the method more realistic a radiation model has been coupled with the iterative procedure adotped for the similarity approach. The multifarious applications of turbulence parameters, viz., the computation of convective velocity scale w*., stability parameter wind velocity and eddy-diffusivity profiles and the most important though qualitatively known, the vertical dispersion height, of dz diffusing cloud have been presented and discussed at length.