基于样本熵的渭河流域降水序列时空特征分析  

Analysis of Temporal and Spatial Characteristics of Precipitation Series in Weihe River Basin Based on Sample Entropy

作　　者：穆佳欣 孙东永[1] 茹亚楠 王淼淼 李现伟 李亚男 MU Jiaxin;SUN Dongyong;RU Ya'nan;WANG Miaomiao;LI Xianwei;LI Ya'nan(School of Water and Environment,Chang an University,Xi an 710054,China)

机构地区：[1]长安大学水利与环境学院,陕西西安710054

出　　处：《人民珠江》2023年第1期101-108,共8页Pearl River

基　　金：省级大学生创新创业训练计划支持项目(S202110710299)。

摘　　要：变化环境下渭河流域降水时空复杂性发生改变。选取渭河流域21个气象站1960—2018年共59 a的实测日降水数据,采用滑动样本熵研究流域降水序列复杂性的静态和动态演变特征,并通过滑动移除样本熵结合贝叶斯变点分析进行突变性检验。结果表明:渭河流域降水序列复杂性具有空间差异性,各子区域降水复杂性和代际变化趋势较为一致,渭河上游、中游及泾河流域降水在1995年发生突变,下游在1991年发生突变,北洛河流域分别在1970、2000年发生突变。In a changing environment, the temporal and spatial complexity of precipitation in the Weihe River Basin changes.In this paper, the measured daily precipitation data of 21 meteorological stations in the Weihe River Basin in 59 years from 1960 to 2018 are selected.The static and dynamic evolution characteristics of the complexity of precipitation series in the Weihe River Basin are studied by the moving sample entropy(M-SampEn).The mutation test is carried out by the combination of the moving cut sample entropy(MC-SampEn) and Bayesian analysis.The results show that the complexity of precipitation series in the Weihe River Basin has spatial differences, and the precipitation complexity and intergenerational variation trend in each sub-region are relatively consistent.The precipitation of the upper and middle reaches of Weihe River and Jinghe River Basin mutated in 1995,and that of the lower reaches of Weihe River mutated in 1991 while that of the Beiluo River Basin mutated in 1970 and 2000.

关 键 词：样本熵 降水 时空特征 渭河流域 

分 类 号：TV125[水利工程—水文学及水资源]