著者

山口 弘誠 中北 英一 野中 理伸

出版者

公益社団法人 土木学会

雑誌

土木学会論文集B1(水工学) (ISSN:2185467X)

巻号頁・発行日

vol.69, no.4, pp.I_307-I_312, 2013 (Released:2014-03-31)

参考文献数

17

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Some rain-gauges produce a disturbance of the air currents which is called "Jevons effect", thereby a disturbance in the distribution of precipitation of such a kind that a part of the rain is carried past the rain-gauge, and the amount of variation from the true rainfall increases with increasing wind velocity. To evaluate the capture ratio when a strong wind occurs, the 9 m2 huge rain-gauge was invented that could reduce and neglect the Jevons effect. The total amount of rainfall for three months observed from the huge rain-gauge is about 5 % greater than that observed from the standard rain-gauge. 2-dimensional video disdrometer analysis showed that the capture ratio was low during the rainfall which had the small median diameter of the raindrop size distribution.