Distribution and variation features of hourly precipitation resource in Chang-Zhu-Tan typical city-group

doi:10.14088/j.cnki.issn0439-8114.2019.15.010

Abstract

Abstract: Taking Chang-Zhu-Tan typical city-group as the research object, based on the hourly precipitation data（1961 to 2017, Mar. to Nov.） from 11 meteorological stations in the study area, the features of interdecadal and seasonal（spring, summer, autumn） variations of the diurnal variation of precipitation, nocturnal precipitation, and precipitation distribution during early rice's blooming period were analyzed. The results showed that, the diurnal distribution of hourly precipitation and precipitation frequency in Chang-Zhu-Tan area were both bimodal, and the peaks appeared basically in the same time. The peaks of precipitation in each decade and season were at 4：00~8：00 and 15：00~16：00 stably, but the peak and sub-peak time appeared differently within decades and seasons. With the progress of time, nocturnal precipitation wavelike rose, and became higher than diurnal precipitation in 1990s and 2000s. The ratio of nocturnal and diurnal precipitation in spring, summer and autumn were 117%, 81% and 110%, respectively. Mufu-Lianyun Mountain district was the high center of nocturnal precipitation. During early rice's blooming period, Mufu-Luoxiao Mountain district was the high center of rainfall amount and precipitation frequency, while central Zhuzhou was the low center.

Key words: diurnal variation of precipitation, nocturnal precipitation, heading-blooming period of rice, distribution of precipitation, Chang-Zhu-Tan area

CLC Number:

S16
F323.2

LI Jing, WANG Tian-ying, ZHU Hong-wu, LU Kui-dong. Distribution and variation features of hourly precipitation resource in Chang-Zhu-Tan typical city-group[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(15): 44-50.

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