摘要
大通站年径流变化特征是长江流域水资源开发利用的重要依据.基于1956-2016年逐月径流数据,采用Mann-Kendall检验、连续小波变换分析等方法,分析了大通站径流的年内分配、线性趋势和变化周期.结果表明:年内分配系数呈下降趋势,年内分配形式在20世纪80年代以前以双峰为主,20世纪80年代后以单峰为主;年际变化特征上,年径流总量突变点为2004年,年汛期径流总量突变点为2008年,但变化趋势不明显;年非汛期径流量突变点为1978年,1988年后的上升趋势显著;周期特征上,年径流总量在1974-1989年存在约8 a左右的显著周期,年汛期径流总量在1969-1985年间存在显著周期为6~9 a左右.年非汛期径流总量在1976-1990年间存在的显著周期为8 a左右.大通站径流的变化特征分析可为流域水资源的合理开发利用提供科学依据.
The variation characteristics of annual runoff at Datong station was an important basis for the development and utilization of water resources in the Yangtze River Basin.Based on the monthly runoff data from 1956 to 2016,this paper analyzes the annual distribution,linear trend and change period of runoff at Datong station by means of Mann Kendall test and continuous wavelet transform analysis.The annual distribution coefficient shows a downward trend,and the annual distribution form is dominated by two peaks before 1980s and single peak after 1980s.The characteristics of interannual variation are that the annual distribution of runoff in the 1950s is relatively uniform,and the annual distribution of runoff in the 1970s is relatively uneven.The abrupt change point of annual runoff is 2004,and the abrupt change point of annual runoff in flood season is 2008,with no obvious trend change;the abrupt change point of annual runoff in non flood season is 1978,with a significant trend of increase after 1988.In the periodic study,the continuous wavelet spectrum of runoff at Datong station has the following characteristics,and the significant period of annual runoff in 1974~1989 is about 8 years,with a total runoff of 1 The period of 1969~1985 is about 6~9 years.From 1976 to 1990,there was a significant period of 8 years for the total runoff in the non flood period.This paper mainly analyzes the variation characteristics of Datong station,in order to provide scientific basis for the rational development and utilization of water resources in the basin.
作者
杨先成
徐光来
董昌明
YANG Xian-cheng;XU Guang-lai;DONG Chang-ming(College of Geography and Tourism,Anhui Normal University,Wuhu Anhui 241002,Chian;Provincial Laboratory of Natural Disaster Process and Prevention and Control in Anhui Province,Wuhu Anhui 241002,Chian;School of Ocean Science,Nanjing University of Information Science&Technology,Nanjing Jiangsu 210044)
出处
《淮阴师范学院学报（自然科学版）》
CAS
2020年第4期320-325,共6页
Journal of Huaiyin Teachers College;Natural Science Edition
基金
国家自然科学基金青年项目(41301029)。
关键词
径流量
趋势
M-K检验
小波变换
大通站
runoff
trend
Mann Kendall(M-K)test
wavelet transform
Datong station
