| 基于小波分析的汾河河津站径流与输沙的多时间尺度特征 |
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| 引用本文： | 刘宇峰,孙虎,原志华.基于小波分析的汾河河津站径流与输沙的多时间尺度特征[J].地理科学,2012(6):764-770. |
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| 作者姓名： | 刘宇峰 孙虎 原志华 |
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| 作者单位： | 陕西师范大学旅游与环境学院;咸阳师范学院旅游与资源环境学院 |
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| 基金项目： | 教育部科学技术研究重点项目(105152);陕西省重点扶持学科历史地理学专项基金(060102)资助 |
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| 摘 要： | 基于汾河流域19个气象台站1959~2005年的月均降水量、河津站的径流量和输沙量资料,借助小波分析方法研究了降水、径流与输沙序列的多时间尺度特征及它们的耦合关系。结果表明:降水、径流与输沙量具有2~4a、14~18 a左右2个不同尺度的周期变化,且三者的主周期基本一致,即3 a和16 a;3 a尺度上,3个要素曲线的正、负位相交替频繁,突变点较多,且曲线变化除个别时段发生紊乱外基本上保持同步性;16 a尺度上,突变点较少,3条曲线的正、负位相交替相应减少且出现不同步现象。降水、径流与输沙量曲线发生趋势变化及出现不同步现象的原因包括自然因素和人类活动,而后者是其主要影响因素。
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| 关 键 词： | 降水 径流 输沙 小波分析 多时间尺度 汾河 河津站 |
Multitime Scale Features of Runoff and Sediment Discharge on Wavelet Analysis at Hejin Station of Fenhe River Basin |
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| LIU Yu-feng,SUN Hu,YUAN Zhi-hua.Multitime Scale Features of Runoff and Sediment Discharge on Wavelet Analysis at Hejin Station of Fenhe River Basin[J].Scientia Geographica Sinica,2012(6):764-770. |
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| Authors: | LIU Yu-feng SUN Hu YUAN Zhi-hua |
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| Institution: | 1.College of Tourism and Environment,Shaanxi Normal University,Xi’an,Shaanxi 710062,China;2.College of Tour Resources and Environment,Xianyang Normal University,Xianyang,Shaanxi 712000,China) |
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| Abstract: | The multitime scale features and coupling relationship of precipitation,runoff and sediment discharge of Fenhe River Basin during 47 years between 1959 and 2005 were analyzed in the paper,by applying wavelet analysis method.The results indicated that there were two significant periodic variations at scales of 2-4 a,14-18 a for precipitation,runoff and sediment discharge.And the main periods of them were nearly the same.This first main period was 16 years,while the second main period was 3 years.At the 3-year scale,the positive and negative phases about the curves of precipitation,runoff and sediment discharge had appeared frequently,and there are many mutation points.Most of the time the changes of precipitation,runoff and sediment discharge had the synchronization during 47 years.At the 16-year scale,the mutation points,recurring cycles of positive and negative phase for three hydrological time series had became less than the 3-year scale.At the same time,there is not always synchronization for three curves.The trends of precipitation,runoff and sediment discharge and their non-synchronization were closely tied to natural factors and high-frequent human activity.And it is very important for human activity to affect the trends. |
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| Keywords: | precipitation runoff sediment discharge wavelet analysis multitime scale Fenhe River Hejin Station |
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