Studies on Meteorological Parameters and Mixing Height in Gold Mining Area

Gold mining at Ko lar Go ld Fields is closed but some industries in this area are in operation and some may like to be established. Data on at mospheric and meteorological parameters were generated using SODA R (Sound Detection and Ranging) and auto matic weather station in different seasons. Over 2000 sodar echograms were recorded and classified into six categories like rising layer, thermal plu me (free), ground based layer (spiky top), ground based layer (flat top), ground based mu ltiple layers and dot echo structures. Using echograms, unstable period was determined to know the d iluting capability of at mosphere for pollutants in the seasons. The highest duration of mixing heights revealed the period of h ighest dispersion. Based on the sodar echograms and mixing height, stability classes for the d ifferent times of the day were evaluated, which can be used for the estimation of dispersion coefficients. Influence of wind speed, wind direction, temperature, hu midity, solar rad iation and rainfall on mixing heights was studied. Statistical model was developed for the prediction of mixing height. Model adequacy was checked using F-statistics, normal d istribution curve and correlation between predicted and measured values of mixing heights.