汉江上游汉中段近50年实测径流变化趋势及特征分析  

Analysis of The Trend and Characteristics of The Runoff Measured at The Hanzhong City Section in Upper Hanjiang River in The Past 50 Years

作　　者：李婧[1] 赵鸿[1] 李百凤[1] 刘蕊蕊 LI Jing;ZHAO Hong;LI Baifeng;LIU Ruirui(PowerChina Northwest Engineering Corporation Limited, Xi'an 710065,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,西安710065

出　　处：《西北水电》2020年第2期26-31,共6页Northwest Hydropower

摘　　要：河流生态环境作为生态文明建设的重要组成部分,研究河流实测径流量的变化趋势及特征具有重要意义。选取汉江上游汉中段武侯镇站、汉中站、洋县站典型水文站,采用Mann-Kendall统计检验和小波函数分析汉江上游汉中段长系列实测年径流量的变化特征。结果表明,20世纪90年代以来,汉江上游汉中段实测径流量总体呈减少趋势;上下游站实测年径流量的变化趋势相似,下游站较上游站的减少趋势明显;3个水文站近50年年平均实测径流序列突变发生在1991年,且呈现出约7 a的变化周期。Ecological environment of rivers plays an important role in ecological civilization construction;therefore,it is of great significance to study the trend and characteristics of the measured river runoff.The typical hydrological stations of Wuhouzhen Station,Hanzhong Station and Yangxian Station at Hanzhong City section in Upper Hanjiang River were selected,and Mann-Kendall statistical test and wavelet function were used to analyze the variation characteristics of the measured long series annual runoff of Upper Hanjiang River.The results show that since the 1990s,the measured runoff at upper reaches of the Hanjiang River is decreasing generally;the changes in measured annual runoff of upstream and downstream stations are similar,and the decreasing trend of downstream stations is more obvious than that of upstream stations;The annual average runoff mutation measured at the three hydrological stations in the past 50 years occurred in 1991 and showed a cycle of about 7 years.

关 键 词：实测径流量 M-K检验 小波分析 汉江上游汉中段 

分 类 号：TV121[水利工程—水文学及水资源]