小波分析在鄱阳湖水位序列多时间尺度分析中的应用  

Multi-time-scale Analysis of Water Level Series with Wavelet Transform in Poyang Lake

作　　者：游海林[1,2] 徐力刚[1] 刘桂林[1] 吴永明[2] 王晓龙[1] 姜加虎[1] 

机构地区：[1]中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,江苏南京210008 [2]江西省科学院鄱阳湖研究中心,江西南昌330096

出　　处：《水力发电》2015年第2期12-15,44,共5页Water Power

基　　金：国家自然科学基金资助项目(41371121;41271034);江苏省科技厅项目(BE2014739;BZ2014005);中国科学院支持全国科学院联盟建设专项重大项目

摘　　要：运用Morlet连续复小波函数分析鄱阳湖星子水文站1953年～2012年历年年均水位变动的多时间尺度演变特征，并在水位变动的小波方差分析结果的基础上运刚surfer8．0绘制出控制鄱阳湖历年年均水位演变的主周期趋势图。结果表明，鄱阳湖历年年均水位在不同时间尺度的分辨率条件下，其序列最现出不同的周期交替现象，演变过程巾存在着25～32、19～23、8～15年以及3～7年4类时间尺度的周期变化规律；其变动存在3个较为明显的峰值．依次对应着28、22、5年的时间尺度；3类时问K度具有较明显的局部化特征，前两个时间尺度上，年均水位变动的平均周期为19、15年左右，在5年时间尺度上，历年年均水位变动的频率变化较快，同时振荡行为也较明显。The mean annual water levels from 1953 to 2012 in Poyang Lake are selected as the study object, and the complex continuous Morlet wavelet is used to study the multi-time-scale variation characteristic of water level fluctuations. Based on the wavelet variances, the primary period trend graphs that control the mean annual water level fluctuations of Poyang Lake are drawn out. The results show that： （a） there are four cycle variations （i.e. years of 25-32, 19-23, 8-15 and 3-7） in mean annual water level fluctuations in Poyang Lake, and the strength and distribution of each cycle variation is different as well as the catastrophe point; （b） the mean annual water level fluctuations are mainly in the presence of three conspicuous peaks, which are in correspondence with the time scales of years of 28, 22 and 5 in Poyang Lake; and （c） each different time scale has apparently localized features, i.e. the mean water level fluctuation cycle is about 19 years in the 28-year time scale and about 15 years in the 22-year time scale, but the water level fluctuation changes more frequently and oscillates more significantly in the 5-year time scale.

关 键 词：历年年均水位 MORLET小波 星子站 鄱阳湖 

分 类 号：P333[天文地球—水文科学]