淮河流域降雨时空变化研究  

Analysis of Rainfall Spatio-Temporal Variation in the Huai River Basin

作　　者：刘开磊 刘小虎 王式成 徐雷诺 LIU Kailei;LIU Xiaohu;WANG Shicheng;XU Leinuo(Anhui&Huaihe River Institute of Hydraulic Research,Hefei 230000,China;Huaihe River Commission of the Ministry of Water Resources,Bengbu 233000,China)

机构地区：[1]安徽省水利部淮河水利委员会水利科学研究院,安徽合肥230000 [2]水利部淮河水利委员会水文局(信息中心),安徽蚌埠233000

出　　处：《水文》2023年第2期115-119,共5页Journal of China Hydrology

基　　金：国家重点研发计划重点专项“流域雨洪资源高效开发利用技术及示范”(2016YFC0400909)。

摘　　要：降雨量及其演变规律是表征区域水资源天然禀赋条件的重要内容,直接影响区域水生态系统的健康、区域供用水平衡以及水资源开发利用活动。为充分了解近年来淮河流域降雨变化情况,本研究利用1956—2020年淮河流域141个雨量代表站逐年降雨量资料,对降雨时空变化特征开展研究。研究表明:(1)淮河流域降雨量呈现显著的波动下降趋势,年均降幅约0.55 mm;(2)不同时期降雨量的周期性特征差异显著,具体表现为7年尺度的次周期逐渐消失、2年尺度主周期逐渐加强;(3)地区间降雨分布不均、降雨变异系数Cv差异较大,其由南向北,降雨量由高于1600 mm逐渐递减到不足600 mm、Cv指标则由0.17增长到0.34左右。The spatial-temporal variation of precipitation is an important part of natural endowment of regional water resources,which directly affects the health of regional water ecosystem,the balance of regional water supply and use,and the development and utilization of water resources.In order to fully understand the regularity of rainfall change in the Huai River basin in recent years,this paper studied the temporal and spatial variation characteristics of rainfall based on the annual rainfall data of 141 rain⁃fall stations in Huai River basin from 1956 to 2020.The results show that:(1)the rainfall in the basin shows a significant fluc⁃tuation-decreasing trend,with an average annual decrease of about 0.55mm;(2)there is a significant difference in the periodici⁃ty of the rainfall in different periods,which is manifested by the gradual disappearance of the sub-cycle of the seven-year scale and the gradual strengthening of the main cycle of the two-year scale;(3)the uneven distribution of rainfall and the large differ⁃ence in the coefficient of variation of rainfall between regions,with the rainfall decreasing gradually from over 1600 mm to less than 600 mm from south to north,and the rainfall index Cv increasing from 0.17 to about 0.34.

关 键 词：淮河流域 代表性分析 趋势分析 小波分析 

分 类 号：TV122[水利工程—水文学及水资源]