湫水河流域1955-2020年降雨变化规律

The variation law of rainfall in the Qiushui River Basin from 1955 to 2020

本文以湫水河流域1955-2020年降雨资料为研究对象,运用SPSS及Mann-Kendall统计分析方法,研究了年降雨的变化规律。结果表明:湫水河流域1955-2020年年降雨量在197.3~714.1 mm,且以6.1 mm/10 a的速率递增,在整个研究时段内降水共增加了40.27 mm。该流域降雨量呈逐步增加的趋势,存在一个先降低又升高的变化过程。

This study took the rainfall data in the Qiushui River Basin from 1955 to 2020 as the research object,and used SPSS and Mann-Kendall statistical analysis methods to study the variation law of the annual rainfall in the basin.The results showed that the annual rainfall in the Qiushui River Basin from 1955 to 2020 was between 197.3 mm and 714.1 mm,and it increased at a rate of 6.1mm/10 year.The precipitation increased by 40.27 mm during the entire study period.The rainfall in the basin showed a gradually increasing trend,and there was a changing process of decreasing and increasing.