Analysis on raindrop size distribution of typical stations in China during rainy season

doi:10.14088/j.cnki.issn0439-8114.2021.01.011

Abstract

Abstract: By using the data observed by laser raindrop spectrometer between 2018 and 2019,the raindrop size distribution characteristics of typical stations,which were selected by regions in China,were analyzed.The results show that,the correlation coefficients for hourly rainfall intensities calculated from minute raindrop spectrometer data and rain gauge data respectively,all exceeded 0.92,and the average differences were negative and increased with rainfall intensity.The frequency percentage patterns of different raindrop diameter classes showed double peaks,but the quality percentage patterns showed multi peaks.The contribution present to number concentration of small raindrop with a diameter less than 1 mm was 77.8%,however,the contribution present to rainfall intensity only was 18.1%.Large raindrop with a diameter more than 2 mm,contributed 2.6% to number concentration and 41.8% to rainfall intensity.When taking the effect of raindrop velocity into account,the contribution of small raindrop increased 9.7 percent,meanwhile the contributions of middle and large raindrop decreased.With decreased of rainfall intensity,the number concentrations of large raindrop decreased,the super large raindrops disappeared,and raindrop spectral width became narrow.However,variations on number concentrations of small raindrop differed by stations.

Key words: laser raindrop spectrometer, raindrop size distribution, rainy season, observation difference, typical stations

CLC Number:

P426

LIU Zhen, WU Xue-yuan, YU Yu, REN Zhi-hua. Analysis on raindrop size distribution of typical stations in China during rainy season[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(1): 53-59.

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