重庆市沙坪坝区35年来降雨特征分析(英文)

Analysis on Characteristics of Rainfall in the 35 Years in Shapingba Region of Chongqing Municipality

基于35年的降雨资料,运用SPSS和Excel软件对重庆市沙坪坝区35年来降雨空间分布特征、年降雨的变化趋势及周期进行探讨。结果表明,研究区35年来年降雨量呈正态分布,根据年降雨量变化的线性趋势分析及降雨的趋势系数r指标的计算结果,可得出35年来研究区年降雨量有增加的趋势。从研究区的年降雨量距平序列来看,正距平的变化幅度均要比负距平的变化幅度大,年降雨变化具有明显的阶段性。气候偏干阶段和偏湿阶段与降雨丰枯趋势相一致,存在明显的年际变化。

Based on the rainfall data in the 35 years,the spatial distribution characteristics,variation trend of annual precipitation and period in Shapingba Region of Chongqing municipality were discussed by using SPSS and Excel software.The results showed that the amount of rainfall in the 35 years in Shapingba Region was in normal distribution.According to the analysis on linear tendency of annual precipitation variation and the calculation result of coefficient r index,it was found that the annual precipitation showed an increasing trend in study area.From the departure sequence of rainfall,the change range of positive departure was bigger than that of negative departure and the change of yearly rainfall had obvious stage.The climate drier period and wetter period kept pace with the trend of rain falling and had obvious annual variation.