汉江中上游流域降水变化趋势研究

Research on the Precipitation Variation Trend in the Middle and Upper Reachesof Hanjiang River

利用1956年~2018年63 a汉江中上游流域降雨观测资料,采用Mann-Kendall检验方法对区域内降雨特性进行了分析。结果表明:汉江流域降雨年际变化具有显著的随机性,并且流域及其分区的年降水量受空间分布影响显著,具有明显的流域性、空间群发性。

Using the rainfall observation data of the middle and upper reaches of the Hanjiang River from 1956 to 2018,the Mann-Kendall test method was used to analyze the rainfall characteristics in the region.The results show that the interannual variation of rainfall in the Hanjiang river basin has significant randomness.The annual precipitation in the basin and its districts is significantly affected by the spatial distribution.It has obvious watershed characteristics and spatial mass distribution.