Interpretation of Acousting Sounding Records with Meterological Parameters and Ventilation Coefficient Over Delhi

Atmospheric Boundary Layer (ABL) height is an important parameter in defining the Ventilation Coefficient (VC) of any area. In this work, SODAR (Sound Detection and Ranging) observed data different echograms for year 2020 has been used structure identification. The interpretation ecograms often not straight-forward. paper, along with meteorological parameters over Delhi described. ecogram structures were interpreted VC analysis. It from that during foggy days, values vary day to winter, daily maximum occurring between 13:00 15:00 h. daytime varied significantly sunrise sunset, while night-time remained relatively stable (200 m2/s). However, due fog diurnal variation 16:00 h 11:00 h, evening all night then next morning until 12:00 atmospheric condition stable. At maximal wind speeds, a 1600 m2/s (at h) was extended fumigation. With minimal speeds ABL height, minimum 100 20:00 observed. both VCs smaller than optimal 6000 safe dispersion.