摘要
灞河流域水旱灾害频发且常交替出现,为分析该地区洪水特性,以区域内1952年~2021年实测年最大洪峰流量序列资料为依据,采用距平、线性回归、5年滑动平均、Mann-Kendall检验、复Morlet小波等方法对其洪峰流量特性进行分析。结果显示,灞河流域洪峰流量特征在气候、地理环境、人类活动等因子共同作用下发生了变化。灞河流域年最大洪峰流量整体呈显著性下降趋势,中游变化倾向率每年为-58.73 m^(3)/s,上游变化倾向率每年为-18.79 m^(3)/s。灞河中游存在3个突变点,上游存在5个突变点。灞河流域存在27 a~28 a的主周期存在9.8 a的次周期。
Flood and drought disasters occur frequently and often alternately in the Bahe River basin.Based on the measured annual maximum peak discharge series data from 1952 to 2021 in the region,the characteristics of peak discharge are analyzed by using the methods of anomaly,linear regression,5-year moving average,Mann Kendall test,complex Morlet wavelet,etc.The results show that the characteristics of flood peak discharge in the Bahe River basin have changed under the combined effects of climate,geographical environment,human activities and other factors.The annual maximum peak discharge of the Bahe River basin shows a significant downward trend as a whole.The change tendency rate in the middle reaches is-58.73 m^(3)/s per year,and the change tendency rate in the upstream reaches is-18.79 m^(3)/s per year.There are 3 mutation points in the middle reaches of Bahe River and 5 mutation points in the upstream.The Bahe River basin has a main period of 27 a to 28 a and a sub period of 9.8 a.
作者
石军孝
靳姗姗
胡晨
Shi Junxiao;Jin Shanshan;Hu Chen(Hydrological and Water Resources Survey Centre of Shaanxi,Xi'an 710068,Shaanxi)
出处
《陕西水利》
2023年第1期58-61,共4页
Shaanxi Water Resources
