| 西北江网河区顶端分流比变化特征研究 |
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| 引用本文： | 张灵,王兆礼,陈晓宏.西北江网河区顶端分流比变化特征研究[J].水文,2010,30(6). |
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| 作者姓名： | 张灵 王兆礼 陈晓宏 |
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| 作者单位： | 广州大学地理科学学院;华南理工大学土木与交通学院;中山大学水资源与环境研究中心; |
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| 基金项目： | 国家自然科学基金项目，国家自然科学基金重点项目 |
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| 摘 要： | 根据三水、马口水文站1959~2004水文年实测流量资料的月均序列,应用经验模式分解(EMD)方法分析三水站分流比水文年序列的周期变化及趋势变化,应用启发式分割算法(BG)识别变异点,并采用R/S分析方法探讨分流比变化的持续性特征,结果表明:近46年来,三水站分流比序列具有3.2a、6.6a、15.3a、30.7a的波动周期,表现出复杂的多时间尺度性;三水站分流比的变化趋势是显著增加.增加速率为0.0022/a,并在1992年发生了突变,且为均值向上跳跃;该序列具有非常强的状态持续性,存在长期记忆性,未来仍将呈显著的增加趋势.
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| 关 键 词： | 分流比 变化特征 经验模式分解 西北江网河区 |
Variation Characteristics of Annual Average Diversion Ratio of Discharge in the Upper West River and North River Network |
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| ZHANG Ling,WANG Zhao-li,CHEN Xiao-hong.Variation Characteristics of Annual Average Diversion Ratio of Discharge in the Upper West River and North River Network[J].Hydrology,2010,30(6). |
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| Authors: | ZHANG Ling WANG Zhao-li CHEN Xiao-hong |
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| Institution: | ZHANG Ling1,WANG Zhao-li2,CHEN Xiao-hong3(1.School of Geographical Sciences,Guangzhou University,Guangzhou 510006,China,2.School of Civil and Transportation Engineering,South China University of Technology,Guangzhou 510641,3.Center for Water Resources and Environment Research,SUN Yat-sen University,Guangzhou 510275,China) |
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| Abstract: | Based on the streamflow data at Sanshui and Makou stations in the upper West and North River network from 1959 to 2004,the empirical mode decomposition(EMD),rescaled range analysis(R/S) and heuristic segmentation(BG) methods were used to find out the variation law of annual average streamflow ratio of Sanshui/(Makou + Sanshui).The empirical mode decomposition method was used to obtain intrinsic mode functions(IMFs),by which variations of the original series were analyzed with various time scales.The results... |
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| Keywords: | diversion ratio of flow discharge variation characteristics empirical mode decomposition West and North River network |
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