Multiple Time Scales Analysis of Lowest Runoff in Lijiang River

LUO Shu-wen; DENG Ya-dong; QIN Xing-ming; SHI Wen-qiang

doi:10.13961/j.cnki.stbctb.2014.06.019

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Multiple Time Scales Analysis of Lowest Runoff in Lijiang River

- Multiple Time Scales Analysis of Lowest Runoff in Lijiang River
- Bulletin of Soiland Water Conservation Vol. 33, Issue 6, Pages: 64-67(2014)
- 作者机构：
  
  中国地质科学院岩溶地质研究所/国土资源部广西壮族自治区岩溶动力重点实验室,广西,桂林,541004
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2014.06.019
  CLC：
- Published：2014
- 稿件说明：
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LUO Shu-wen, DENG Ya-dong, QIN Xing-ming, et al. Multiple Time Scales Analysis of Lowest Runoff in Lijiang River[J]. Bulletin of Soiland Water Conservation, 2014, 33(6): 64-67.
DOI：

LUO Shu-wen, DENG Ya-dong, QIN Xing-ming, et al. Multiple Time Scales Analysis of Lowest Runoff in Lijiang River[J]. Bulletin of Soiland Water Conservation, 2014, 33(6): 64-67. DOI： 10.13961/j.cnki.stbctb.2014.06.019.

摘要

基于小波和R/S分析方法

探讨了漓江流域桂林水文站55 a年最枯径流量序列的演变特性。结果显示:(1)最枯径流量存在12和30 a尺度的两个主周期

同时也存在4和6 a尺度的两个次周期

使其呈现出较明显的周期性变化;(2)桂林站年最枯径流量有逐渐减少的趋势

并且6

30 a的最枯径流量也有减少趋势

而4 a周期最枯径流量有增加趋势。与此同时

运用P-Ⅲ型曲线对各个周期最小值发生的频率进行了计算

4 a周期最枯径流量(8.09 m

/s)发生频率为35%~40%

6 a周期最枯径流量(5.3 m

/s)发生频率为10%~15%

12 a周期最枯径流量(10.2 m

/s)发生频率为55%~60%

30 a周期最枯径流量3.8 m

/s发生频率为1%~5%。

Abstract

Based on the Morlet wavelet transform and R/S method

the evolution features of the 55 years annual withered runoff in Guilin hydrometric station of Lijing River was analyzed. The results showed that the lowest runoff have primary period of 12 years and 30 years and subperiod of 4 years and 6 years

which represented the period change. The annual lowest runoff showed the tendency of dropping off and the 6

30 years shared the same tendency. 4 years showed the tendency of increasing. Meanwhile

P-Ⅲ was used to calculate the minimum frequency of every period. The frequency of the lowest runoff(8.09 m3/s) for 4 years was 35%~40%

the frequency of lowest runoff(5.3 m3/s) for 6 years was 10%~15%

the frequency of lowest runoff 10.2 m3/s for 12 years was 55%~60%

and the frequency of lowest runoff(3.8 m3/s) for 3 years was 1%~5%.

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