摘要
Abstract
This study attempted to examine rainfall change tendency in Kaoping River basin under the climatic change condition. The basin was divided into the mountain and the flat regions along the Chaozhou fault in the basin. Nonparametrie methods including the Mann-Whitney-Pettitt (MWP) test, the Mann-Kendall tendency test, and t test were used to analyse the difference and tendency of annual rainfall, maximum daily rainfall, annual rainfall days, annual rainfall intensity, and seasonal rainfall types. The analysis results show that the tendency of rainfall amounts and intensity have obviously increased in both mountain and the flat regions. The remarkable change periods were occurred ranging from years 2000 to 2004. Therefore, the data were divided into two time periods based on the change point. Before the change point, the frequencies of strong torrential rain events were once per 2 and 8 years for mountain and flat regions, respectively. However, after change point the frequencies were increased to two times per year in mountain region and once two year in flat region. In the various season rainfall type tests, however, the rainfall was shown increase in the typhoon season only after the change point. This demonstrated that the rainfall has increased tendency in wet season in the period 1980-2009, especially concentrates in the typhoon season, hut the rainfall has not remarkable change tendency in dry season.关键词
降雨特性/非参数统计方法/趋势检定/气候变化/高屏溪流域Key words
Rainfall characteristic/Nonparametric statistical methods/Trend test/Climate change/Kao-Ping River Basin分类
建筑与水利
