摘要
小流域河川径流序列的变化规律及周期特征分析,对小流域水利工程建设、水资源开发利用等具有重要的现实意义。基于乌江吊水岩冲沟1961-2014年天然径流序列,通过基尼系数、累积距平法、Mann-Kendall法、Morlet小波分析法等方法分析研究了年径流序列的年内分配、趋势特征、突变特征及周期特征。结果表明:吊水岩冲沟年径流年内分配大部分相对合理,部分径流年内分配差距较大;吊水岩冲沟年径流量呈不显著减少变化;年径流量丰枯转变频繁,突变多发生于1992-1998年;年径流量存在明显周期特性,第一主周期为23 a,次周期为17、6 a。研究成果可为小流域水资源开发利用提供依据。
Runoff variation and cycle characteristics of small watershed analysis have important practical implications for water conservancy construction of small watershed, water resources development and utilization. Based on the natural runoff series of Diaoshuiyan gully in Wujiang River from 1961 to 2014, the annual distribution, trend characteristics, catastrophe characteristics and periodic characteristics of annual runoff series are analyzed and studied by Gini coefficient, cumulative anomaly method, Mann-Kendall method and Morlet wavelet analysis method. The results show that most of the annual runoff distribution in the Diaoshuiyan gully is relatively reasonable, and some of the annual runoff distribution is quite different;the annual runoff of the Diaoshuiyan gully shows no significant decrease;the annual runoff changes frequently, with sudden changes occurring mostly from 1992 to 1998;the annual runoff has obvious periodic characteristics, the first main cycle is 23 years, and the second cycle is 17 years and 6 years. The research results can provide a basis for the development and utilization of water resources in small watershed.
作者
刘涛
杨银科
王天尧
LIU Tao;YANG Yin-ke;WANG Tian-yao(Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region,School of Water and Environment,Changan University,Xi'an 710054,China)
出处
《科学技术与工程》
北大核心
2020年第9期3744-3749,共6页
Science Technology and Engineering
基金
中央高校基本科研业务费(300102298203)
陕西省自然科学基础研究计划面上项目(2017JM4018)。
