An empirical model of raindrop size distribution has been formulated in this paper through which the relationship between integral parameters with the rainfall rate is deduced through a general form of gamma distribution function. It suitably connects the radar reflectivity factor, attenuation and other integral parameters with the rainfall rate. The variation of parameters in the distribution function has been worked out empirically. Numerical analyses of the fluctuations of integral parameters and distribution parameters have been carried out which are compared with some earlier works.
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