Study on Spatial Distribution Characteristics of Statistical Parameters of Hourly Extreme Precipitation in Sichuan Province
The author used conventional moment method and linear moment method to analyze the spatial distri-bution characteristics of the mean,deviation coefficient,skewness coefficient,and kurtosis coefficient of at 328 stations in Sichuan Province.The results show that the mean values,deviation and kurtosis coefficients of 1-hour and 3-hour extreme precipitation in Sichuan Province are gradually increasing from the western Sichuan Plateau to the Sichuan Basin.The overall distribution of extreme precipitation skewness coefficients shows a decreasing trend from northwest Sichuan to southeast Sichuan,and the high value centers are concentrated in the western Sichuan basin;the high value centers of 1-hour and 3-hour kurtosis coefficients appear in the south-ern Panxi region and the western Sichuan plateau,respectively.The results of this paper have important refer-ence value in the prevention work of flash flood forecasting and early warning in small and medium-sized basins in Sichuan Province.
Linear moment methodExtreme precipitationStatistical parametersHourly precipitation
国家科技期刊平台
NSTL
万方数据
维普
