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http://dx.doi.org/10.3741/JKWRA.2003.36.2.237

A Study on the Underestimation of the Rainfall Data due to Wind  

Park, Moo-Jong (한서대학교 토목공학과)
Kim, Eung-Seok (고려대학교 부설 방재과학기술연구센터)
Kim, Joon-Hoon (고려대학교 토목환경공학과)
Publication Information
Journal of Korea Water Resources Association / v.36, no.2, 2003 , pp. 237-249 More about this Journal
Abstract
Wind effects on a rain gauge can cause a significant underestimation of rainfall depths and contribute to the inconsistency in rainfall data. To revise the rainfall data requires the study about calculation of deficiency percentages of rain catch. There are few studies which reflect the variation of wind speed. in this study, the raindrop terminal velocity is quantified according to the particle size of rainfall. The model for calculating deficiency percentages of rain catch according to the particle size of rainfall is examined by experimentation. Experimentation shows that deficiency percentages of rain catch have no relationship with rainfall intensity and affected by raindrop diameter. In conclusion, the estimated deficiency percentages of rain catch coincided with the experimental results and can be used as recommended adjustment factors.
Keywords
wind speed; rainfall; rainfall gauge; deficiency percentages;
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