淮河流域汛期降水结构变化特征  

Spatial-Temporal Variation Characteristics of Precipitation Pattern in the Huai River Basin during Flood Season

作　　者：刘赛艳 解阳阳 方红远[1] 沈腾 LIU Saiyan;XIE Yangyang;FANG Hongyuan;SHEN Teng(College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou 225009,China;Modern Rural Water Conservancy Research Institute,Yangzhou Unwersity9 Yangzhou 225009,China)

机构地区：[1]扬州大学水利科学与工程学院,江苏扬州225009 [2]扬州大学现代农村水利研究院,江苏扬州225009

出　　处：《水文》2022年第5期102-108,共7页Journal of China Hydrology

基　　金：国家自然科学基金资助项目(52009116);江苏省自然科学基金项目(BK20200958,BK20200959);中国博士后科学基金项目(2018M642338)。

摘　　要：基于淮河流域29个气象站1960-2020的日降水数据,采用降水发生率和降水贡献率两个指标和改进的Mann-Kendall检验法,研究了淮河流域汛期不同降水历时和不同降水等级的时空演变规律。结果表明:汛期,随着降水历时(或降水等级)的增加,流域降水发生率不断减小,贡献率则先增后减;受地形特征和季风系统变化的影响,淮河流域南部、西部和东北部边缘地带降水结构多出现显著变化趋势,而中部平原区降水结构整体变化趋势不显著。Based on the daily precipitation data of 29 meteorological stations in the Huai River basin from 1960 to 2020, this paper analyzed the spatial-temporal variation characteristics of precipitation pattern during the flood season by using precipitation incidence rate(IR) and contribution rate(CR) and the modified Mann-Kendall test. The results show that:during the flood season, IR of precipitation events for different duration(grade) decrease with the increase of precipitation durations(grade),while the corresponding CR firstly decreases and then increases. Due to the influence of topographic features and monsoon system, the precipitation structures in the southern, western and northeastern fringes of the basin tend to change significantly while the overall trend of precipitation structure is not significant.

关 键 词：降水结构 汛期 降水历时 降水等级 淮河流域 

分 类 号：TV125[水利工程—水文学及水资源] TV121