Shape of the rain drop size distributions and classification of rain type at Gadanki
2006
Three different rain drop size distribution (RDSD) models namely exponential, lognormal and gamma distribution are fitted to RDSD as spectra observed from Joss-Waldvodgel Disdrometer (JWD) at Gadanki (13.8oN, 79.18oE). Gamma distribution shows overall good agreement with observed RDSD for all ranges of rainfall rate. Rainfall rate calculated from gamma drop size distribution is found to have minimum root mean square error and biasing compared to exponential or lognormal distribution. The intrinsic shape of RDSD is found out from normalized RDSD which follows an “S” shape for both low rain ≤ 10 mm h
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