摘要
河南省地处中原,跨海河、黄河、淮河、长江四大流域,研究其降水时间分布均匀特征对全省水资源动态管理和水旱灾害防御具有重要意义。以河南省为研究对象,基于522个雨量站点的1956-2021年长系列降水量数据,采用降水集中指数PCI、降水集中度Q等指标,辅以Kriging空间插值等方法,分析了全省降水时间均匀特征及变化特点。结果表明:河南省降水时间均匀特征具有地区差异性,北部降水时间分布较为集中,南部降水时间分布较为均匀,集中程度总体上呈现由北向南递减;降水时间均匀特征的多年变化趋势较小,除河南省东北部及省辖淮河流域西北部分区域外,其他区域略呈集中趋势;降水时间均匀特征与降水量、气象干旱程度有一定的正向关联但相关性极弱,因此研究旱涝事件时应将降水时间均匀特征作为一个独立因素加以考虑。
Henan Province is located in the Central Plains region,spanning four major river basins,namely,the Haihe River,the Yellow River,the Huaihe River and the Yangtze River.The study of its precipitation time uniformity characteristics is of great significance to the province′s water resources dynamic management and drought and flood disaster defense.Taking Henan Province as the research object,this paper analyzes the temporal uniformity characteristics and change features of precipitation in the province based on the long series of precipitation data from 1956 to 2021 at 522 rainfall stations,using the indicators of precipitation concentration index PCI and precipitation concentration Q,supplemented by Kriging spatial interpolation and other methods.The results are as follows.The uniform characteristics of precipitation time in Henan Province are characterized by regional variability,with the distribution of precipitation time in the north being more concentrated,and that in the south being more uniform,with the degree of concentration generally decreasing from north to south.The multi-year trend in the temporal uniformity of precipitation characteristics is small,with a slight tendency toward concentration,except in northeastern Henan Province and parts of the northwestern part of the provincially-administered Huaihe River Basin.Precipitation time uniformity characteristics have some positive but very weak correlation with precipitation and meteorological drought.Therefore,precipitation time uniformity should be considered as an independent factor when studying drought and flood events.
作者
吴奕
李飞
李超群
WU Yi;LI Fei;LI Chaoqun(Henan Hydrology and Water Resources Monitoring and Forecasting Center,Zhengzhou 450003,China;South-to-North Water Diversion Middle Route Industrial&Development Co.,Ltd.,Beijing 100038,China;Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China)
出处
《华北水利水电大学学报（自然科学版）》
北大核心
2024年第2期73-80,共8页
Journal of North China University of Water Resources and Electric Power：Natural Science Edition
基金
河南省水利科技攻关项目(GG202106)
国家重点研发计划项目(2017YFC0404602)。
关键词
降水量
时间均匀特征
降水集中指数
降水集中度
变化趋势
precipitation
temporal uniformity characteristics
precipitation concentration index
precipitation concentration degree
change trend
