摘要
基于1961—2000年钱塘江闻家堰水文站还原后的天然年径流量资料,采用EMD方法对年径流时序进行了多时间尺度分析。结果表明:还原后的天然年径流量时序可以分解为2个具有不同周期的波动分量和1个趋势分量;钱塘江上游年径流时序分别具有准2～3 a、准4～5 a、准8 a和准15 a的波动周期,说明钱塘江流域产汇流系统具有复杂的多时间尺度性;自20世纪60年代以来,钱塘江上游年径流量持续增大。
Based on EMD method, the multiple time scales feature of the time series of annual runoff at Wenjiayan Hydrological Station in the Qian-tang River had been analyzed based on the real data of natural annual runoff. The results show that the time series of annual runoff after reduction can be decomposed into two fluctuation components with different periods and one component, the fluctuation cycle of the fluctuating components for the time series of annual runoff in the Qiantang River is quasi periodicities of 2-3 years, 4 - 5 years ,8 years and 15 years respectively. Also, exist-ence of the fluctuation cycle shows that the multiple time scales feature of the triggering and confluence system in the Qiantang River basin is com-plexity. The runoff in the upper Qiantang River has been increased continuously since 1960s.
出处
《人民黄河》
CAS
北大核心
2013年第3期30-32,共3页
Yellow River
基金
浙江省自然科学基金重点项目(Z5080048)
国家自然科学基金资助项目(50809058)
关键词
EMD
多时间尺度
时序变化
径流
钱塘江上游
EMD
multiple time scales
time series variation
runoff
upper Qiantang River
作者简介
王翠柏（1988-），男，湖北荆州人，硕士研究生，研究方向为水文水资源。E—mail：wangcuibai666666@163.com
