秦岭-淮河地区降水空间聚类分析  

Spatial clustering of the Qinling-Huaihe region based on precipitation indexes

作　　者：周玉良[1] 周磊 周平[1] 张宇亮[1] 崔毅[1] 金菊良[1] ZHOU Yuliang;ZHOU Lei;ZHOU Ping;ZHANG Yuliang;CUI Yi;JIN Juliang(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009

出　　处：《南水北调与水利科技（中英文）》2024年第6期1100-1109,共10页South-to-North Water Transfers and Water Science & Technology

基　　金：国家重点研发计划项目(2023YFC3206604-02,2023YFC3006605);国家自然科学基金项目(42271084,52379006,52209011);安徽省自然科学基金项目(230808US13,2208085QE179)。

摘　　要：秦岭-淮河地区受复杂地形与多变季风气候影响,降水在年际和年内波动较大,空间分布呈明显区域性。通过分析不同时间尺度降水量,年降水量丰平枯状态和相邻年份年降水量变化的增平减趋势,对秦岭-淮河地区进行降水空间聚类。结果表明:根据候降水量指标可将秦岭-淮河地区分为江淮、黄淮、秦岭以南、秦岭以北4个区,据年降水量丰平枯状态联系数指标可将该地区分为江淮、黄淮、秦岭-淮河交界附近、秦岭以北高原和秦岭以南西段4个区,据相邻年份年降水量变化增平减趋势联系数指标可将该地区分为江淮、黄淮、秦岭3个区;融合3个降水指标的区域划分结果,可将秦岭-淮河地区划分为6个区:江淮、黄淮、秦岭以南、秦岭以北西段和高原区、关中区、秦岭-淮河交界过渡区。基于线性矩法的分区一致性检验表明分区内无奇异站点。Precipitation in Qinling-Huaihe region not only varied greatly at both the inter-and intra-annual time scales,but also exhibited strong spatial variability due to complex and diverse landforms,along with unstable monsoon climate.The amount of precipitation amount as well as its variation showed strong regional characteristics over multi-year time scale,especially in case of multi-year annual precipitation.However,the current research adopted study area for the spatial-temporal characteristics analysis of precipitation in Qinling-Huaihe region which is identical to the administrative regions,or was directly bounded by Qinling Mountains or Huaihe River.Therefore,spatial variability of precipitation in Qinling-Huaihe region has not been fully reflected.Three types of precipitation indexes were used to divide the subregions of Qinling-Huaihe with step-wise clustering method.They were the multi-year average precipitation amount at different time scales,including multiyear average(daily,monthly,yearly and five years and 10 years)precipitation amount,the connection numbers of every two stations in terms of the abundant,normal,or dry states of annual precipitation at each site,and the connection number of every two stations based on the trends of annual precipitation change in adjacent years.Average and standard deviation analysis method was used to identify the abundant,normal,or dry states of annual precipitation at each site,assuming that each state had equal probability,and this method was also suitable to identify the trends of increase,decrease,and unchangeability,of annual precipitation change in adjacent years.The Qinling-Huaihe region can be divided into four subregions based on the pentad precipitation according to the indexes of multi-year average precipitation amount at different time scales,namely the subregion between Yangtze and Huaihe,the subregion between Huanghe and Huaihe,the subregion north of Qinling Mountains,and the subregion south of the Qinling Mountains.Furthermore,with the connection number of

关 键 词：降水空间聚类 候降水量 年降水量丰平枯状态 相邻年份年降水量变化 集对分析 秦岭-淮河 

分 类 号：TV125[水利工程—水文学及水资源] P339[天文地球—水文科学]