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Hydrology 2016, 3(1), 9; doi:10.3390/hydrology3010009

Statistical Analysis of the Raindrop Size Distribution Using Disdrometer Data

Department of Water Resources Hydraulic and Maritime Engineering, National Technical University of Athens, 5 Iroon Polytechniou, Athens 15780, Greece
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Academic Editor: Luca Brocca
Received: 13 August 2015 / Accepted: 2 February 2016 / Published: 19 February 2016
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Abstract

The present study utilizes nine years of measurements taken from a Joss–Waldvogel disdrometer (JWD). From this dataset, thirty six rainfall events, were selected and categorized, respectively, in convective and stratiform types, according to specific criteria. Six statistical distributions namely the one- and two-parameter exponential, the two- and three-parameter lognormal and finally the two- and three-parameter gamma were fitted on the observed drop size distributions (DSDs). The goodness-of-fit between each statistical and the observed distribution was determined based on the Kolmogorov–Smirnov test. The results show that 72% of the stratiform events are best described by the three-parameter lognormal distribution while 28% are best described by the three-parameter gamma distribution. In the case of convective events, the results are more diversified; the two- and three-parameter gamma distribution fits best in 39% and 17% of the events, respectively, while the two- and three-parameter lognormal distribution fits best in 6% and 39% of the events. The one- and two-parameter exponential distribution was not the best fit in any case. Moreover, initial steps have already been taken in order for these findings to be used for calibration purposes of a recently employed X-band rainscanner in the Attica region in Greece. View Full-Text
Keywords: Joss–Waldvogel disdrometer; statistical distribution; DSD; rainscanner Joss–Waldvogel disdrometer; statistical distribution; DSD; rainscanner
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Baltas, E.; Panagos, D.; Mimikou, M. Statistical Analysis of the Raindrop Size Distribution Using Disdrometer Data. Hydrology 2016, 3, 9.

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