【摘要】 以宜昌站120年(1882—2001年)实测日流量资料为基础,利用Morlet小波变换对其汛期日最大流量过程进行多时间尺度变化特性分析.研究结果表明,宜昌站汛期日最大流量存在着18 d左右尺度的主要周期变化,体现了大时间尺度中包含小时间尺度的层次性,对三峡水库的洪水预报、调度和水资源的合理调配有指导作用.更多还原

【Abstract】 Based on Morlet wavelet transform ,the multiple time scales feature of flood season daily maximum flow series at Yichang gauging station have been analyzed in the base of 120 years(1882-2001) daily real data of water discharge.The studied results have shown that above features exist about 18-day dominant period change which indicates the hierarchy of large time scale contains small one. The results give the direction for Three Gorges Reservoir’s flood forecast, flood control and the reasonable allocation of water resources.更多还原