摘要
黄河中游是黄河泥沙来源的主要产区,为明确近二十多年来该区域水沙变化特征,采用Mann-Kendall非参数检验法、Morlet小波分析等方法,分析黄河中游头道拐、龙门、潼关、三门峡和花园口5个水文站的1998-2022年径流量和输沙量的变化特征。结果表明:在研究时段内,除龙门水文站外,其余4个水文站的径流量都呈现出极显著增加趋势,输沙量除头道拐外,其余4个水文站均呈现下降趋势;5个水文站径流量的突变年份主要集中在2005-2008年,输沙量的突变年份无明显规律性,且部分水文站在该研究时段内并未出现突变;小波变换得到研究区径流量和输沙量存在多尺度的周期性变化,径流量的第一主周期集中在27~28a的时间尺度,输沙量的第一主周期集中在10a及31a时间尺度,周期震荡最为剧烈。
The middle reaches of the Yellow River are the main source of sediment in the river.To clarify the characteristics of water and sediment changes in this region over the past two decades,this study uses methods such as the Mann-Kendall non-parametric test,moving t-test,and Morlet wavelet analysis to analyze the trends,mutations,and periodic changes in runoff and sediment transport at five hydrological stations in the middle reaches of the Yellow River,Toudaoguai,Longmen,Tongguan,Sanmenxia,and Huayuankou,from 1998 to 2022.The results show that during the study period,except for Longmen station,the runoff at the other four stations showed a significant increasing trend,while the sediment transport showed a decreasing trend at four stations except for Toudaoguai.The mutation years of runoff at the five research stations are mainly concentrated in 2005-2008,while the mutation years of sediment transport show no obvious regularity,and some stations did not experience any mutation during this period.Wavelet transform reveals that there are multi-scale periodic changes in runoff and sediment transport in the study area.The first main cycle of runoff is concentrated on a time scale of 27-28a,while the first main cycle of sediment transport is concentrated on a time scale of 10 and 31a,with the most intense periodic oscillations.
作者
倪杰
苏言柱
刘东鑫
匡雪梅
Ni Jie;Su Yanzhu;Liu Dongxin;Kuang Xuemei(College of Tourism and Resources Environment,Zaozhuang University,Zaozhuang 277160,Shandong,China)
出处
《绿色科技》
2024年第18期19-27,共9页
Journal of Green Science and Technology
基金
山东省自然科学基金青年项目(编号:ZR2022QD044,ZR2022QD016)。
关键词
黄河
径流输沙
趋势性
突变性
周期性
Yellow River
runoff sediment transport
trend
abrupt change
periodicity
