CAJ | 학술논문

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用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，其序列显现出不同的周期交替现象，演变过程中存在着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类时间尺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。
운용Morlet련속복소파함수분석파양호성자수문참1953년~2012년력년년균수위변동적다시간척도연변특정，병재수위변동적소파방차분석결과적기출상운용surfer8.0회제출공제파양호력년년균수위연변적주주기추세도。결과표명，파양호력년년균수위재불동시간척도적분변솔조건하，기서렬현현출불동적주기교체현상，연변과정중존재착25~32、19~23、8~15년이급3~7년4류시간척도적주기변화규률；기변동존재3개교위명현적봉치，의차대응착28、22、5년적시간척도；3류시간척도구유교명현적국부화특정，전량개시간척도상，년균수위변동적평균주기위19、15년좌우，재5년시간척도상，력년년균수위변동적빈솔변화교쾌，동시진탕행위야교명현。
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.