基于HHT方法的洪家渡水电站年平均流量多尺度演变分析  

Multi-scale analysis of annual average streamflow at Hongjiadu Hydropower Station based on HHT method

作　　者：曹丽青[1] 林振山[1] 纪玲玲[1] 

机构地区：[1]南京师范大学地理科学学院

出　　处：《河海大学学报（自然科学版）》2008年第4期462-465,共4页Journal of Hohai University(Natural Sciences)

基　　金：高等学校博士学科点专项科研基金(20060139010)

摘　　要：应用基于经验模态分解（EMD）的Hilbert-Huang变换（HHT）方法对洪家渡水电站1951-2005年的天然年平均流量系列进行了分析研究，并对未来洪家渡水电站年平均流量变化进行了预测．结果表明：洪家渡站年平均流量存在准3a、准9a、准11a及准30a的波动周期；各时间尺度振荡的方差贡献以3a和9a的为最大；未来5年，洪家渡水电站年平均流量减少的趋势将逐渐扭转，年平均流量将逐年增加．The Hilbter-Huang Transform （HHT） based on Empirical Mode Decomposition （EMD）, a new multi-scale analysis method, was applied to the annual average streamflow at the Hongjiadu Hydropower Station. The results show that the annual average streamflow time series has four fluctuation periods, with approximate durations of 3a, 9a, 11 a and 30a, and that the periods of about 3a and 9a are more frequent. It is also concluded that the annual average streamflow will increase in the next 5 years.

关 键 词：经验模态分解 HILBERT-HUANG变换 洪家渡水电站 年平均流量 演变分析 

分 类 号：P338[天文地球—水文科学]