基于小波分析的三峡水库调度水位变化特性

发布时间：2018-08-17 16:20

【摘要】：根据三峡库区2007-2011年期间的日水位资料,首先对库区水位序列进行小波消噪,然后采用Morlet小波函数对水位消噪时间序列进行了多时间尺度小波分析,揭示三峡水库水位调度变化的多时间尺度的结构特性,并分析不同尺度下的水位调度周期性变化规律.结果表明:各年日水位调度变化出现阶段性的变化特点,主要集中在6-12月,且其波幅明显高于其他月份;不同年份水位调度存在不同时间尺度的变化周期,2007-2011年周期性分析结果显示,2007年的变化周期为57d和17d;2008年的变化周期为56d和9d;2009年的变化周期为64d和36d;2010年的变化周期为64d和25d;2011年的变化周期为64d.
[Abstract]:According to the daily water level data of the three Gorges Reservoir area from 2007 to 2011, wavelet denoising is carried out for the water level sequence of the reservoir area first, and then the multi-time scale wavelet analysis of the water level denoising time series is carried out by using the Morlet wavelet function. This paper reveals the structural characteristics of multi-time scales of water level operation in three Gorges Reservoir, and analyzes the regularity of periodic water level operation in different scales. The results show that the variation of daily water level in each year is characterized by periodic changes, mainly in June-December, and its amplitude is obviously higher than that in other months. The results of the periodic analysis for 2007-2011 show that the period of change in 2007 is 57 days and 17 days; in 2008, 56 days and 9 days; in 2009, 64 days and 36 days; and in 2010, the change cycle is 64 days and 36 days. The period of change was 64 d and 25 d, respectively, and the period of change in 2011 was 64 d.
【作者单位】：三峡大学水利与环境学院;
【分类号】：X832

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