| 东江流域枯水期最长连续无降水日数的变化特征 |
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| 引用本文： | 王兆礼,覃杰香,陈晓宏.东江流域枯水期最长连续无降水日数的变化特征[J].地理研究,2011,30(9):1693-1701. |
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| 作者姓名： | 王兆礼 覃杰香 陈晓宏 |
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| 作者单位： | 1. 华南理工大学土木与交通学院,广州 510641;
2. 中山大学水资源与环境研究中心,广州 510275 |
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| 基金项目： | 国家自然科学基金重点项目(50839005); 华南理工大学中央高校基本科研业务费专项资金(2009ZM0186); 水资源与水电工程科学国家重点实验室开放研究基金资助项目(2010B065) |
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| 摘 要： | 利用1956-2008年东江流域各降雨站点逐日降雨资料，建立枯水期最长连续无降水日数时间序列（LCDD），采用经验模态分解（EMD）方法分析该序列的多尺度振荡变化及趋势变化，应用Mann-Kendall法识别突变点，采用R／S分析方法探讨变化趋势的持续性特征，并初步分析LCDD变化的可能原因。结果表明：近53年来，最长...
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| 关 键 词： | 最长连续无降水日数 变化特征 经验模态分解 东江流域 |
| 收稿时间： | 2011-01-20 |
Variations in longest consecutive dry days in dry season in the Dongjiang River Basin |
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| WANG Zhao-li,QIN Jie-xiang,CHEN Xiao-hong.Variations in longest consecutive dry days in dry season in the Dongjiang River Basin[J].Geographical Research,2011,30(9):1693-1701. |
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| Authors: | WANG Zhao-li QIN Jie-xiang CHEN Xiao-hong |
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| Institution: | 1. School of Civil and Transportation Engineering, South China University of Technology, Guangzhou 510641, China;
2. Center for Water Resources and Environment Research, SUN Yat-sen University, Guangzhou 510275, China |
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| Abstract: | Droughts can cause major economic and human losses,which affects hundreds of millions of people,and numerous studies have highlighted the need for drought prevention.Longest consecutive dry days(LCDD),defined as the longest period during the year when no measurable precipitation was recorded,are used as a simple indicator for identifying years with long dry periods and potential drought conditions.Based on daily precipitation data in dry season during 1956-2008 in the Dongjiang River Basin,this article cons... |
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| Keywords: | longest consecutive dry days variation empirical mode decomposition the Dongjiang river basin |
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