1956一2022年海河流域极端降水时空变化特征
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中图分类号：P467 文献标志码：Adoi：10.3969/j.issn.1000-1379.2026.01.005
Temporal and Spatial Variation of Extreme Precipitation in Haihe River Basin from 1956 to 2022
YANG Mingxin ， ZHAI Jiaqi，WANG Mei'，LIU Kuan ， ZHAO Yong ，YIN Chen （1.School of Water Conservancy and Transportation， Zhengzhou University，Zhengzhou 450001，China; 2.State Key Laboratoryof Simulationand Regulationof WaterCycleinRiver Basin，China Instituteof Water Resources and Hydropower Research，Beijing 100038，China；3.Key Laboratoryof Water Safety for Beijing-Tianjin-Hebei Region of Ministry of Water Resources，Beijing 10o038，China; 4.State Key Laboratory of Hydraulic Engineering Simulation and Safety，Tianjin University，Tianjin 30oO72，China）
Abstract：ToivstigatetespatiotemporalvarationatesofetreepreciiationinhHaieiverBsinailyprecipiatioatafro 37meteorologicalatiosuing922edtoselctxtreepreipiatiodatosaKedll-araeterste distanceweigditeplatiodorletaveletalysiseplodtoeaetesptiempoalaratioatesoftii tationintheHaieRiverBasin.Teresultsshowedthatinthepast67years，theextremeprecipiatonindexesinHaiheRiverBasinsowed adecreasingtrduterstllessodsirfitspall precipiationfrequecndetreeprecipiationitesityidexdecreasedtootwestadsoueastintheothctalandoastplan areas，andtheetreepreipiatioidexesinountaousndhillreasegenrallhghtantatinplainreas.eumbrofhay raindays，thmaxiumpripioof5dasadtetreelyetepreipiatioshowdoeosutatiosin64deimumprecipitationof1dayandthemaximumcotiuous precipitationdaysshowedmoreorlessmutationsi1968and1978.Theperiodicity of diffrent extreme precipitation index series is diferent. The first main cycle is within 41-51 years. Under the scale of the first main cycle，theaveragechangeperiodofthenumberofheavyraindays，extremeprecipitationandmaximumcontiuousprecipitationdaysis31 years，andtheaveragechangeperiodofte1-daymaxiumprecipitation，the5-daymaximumprecipitationandetreelyextreepeipitation is 20-36 years.
Key words：extreme precipitation；trend analysis；temporal and spatial variation；periodic variation；HaiheRiver Basin
0 引言
进入21世纪以来，全球气候呈现持续变暖趋势，全球各地区出现不同程度的气候变化，进而加剧了水文循环速度，导致极端降水事件频发[1-3]。（剩余8325字）
