Empirical drop size distribution data are presented in this paper. Study site was located in Wroclaw city (SE Poland). Disdrometric measurements were been carried out with use of laser monitoring system during single rainstorm on 09 June 2007. Empirical natural rainfall drops size distribution was described by a classical gamma function. Relationship between the drop diameters and its fall velocity for the natural rainfall is also studied with use of new technique based on the joint distribution function.
The paper deals with measurement and classification of the size of the splashed drops of rain using a new formula of classification. According to the new idea a measuring instrument was constructed, in which fast comparators are used. This method of classification offers more exact measurement of the number of drops in every class of size. The older apparatus lost some of the splashed drops, so estimation of the distribution of the effects of the splash was less exact.
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