| 云南干热河谷蒸发量的小波多时间尺度分析 |
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| 引用本文： | 杨保华,李靖,樊毅,郭凯颖.云南干热河谷蒸发量的小波多时间尺度分析[J].云南农业大学学报,2008,23(5):678-682. |
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| 作者姓名： | 杨保华 李靖 樊毅 郭凯颖 |
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| 作者单位： | 云南农业大学水资源与节水灌溉重点实验室 |
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| 基金项目： | 云南省干热地区水资源特性研究课题，云南省高等学校教学科研带头人培养计划，昆明市科技重点攻关项目 |
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| 摘 要： | 为探求和认识独特的河谷水文循环演变规律，采用Morlet复小波变换对云南干热河谷地区的元谋、宾川、元江和潞江坝等4个典型代表站的蒸发量序列进行了多时间尺度分析，在不同时段的蒸发量时间尺度信号的强弱分布状况研究基础上，探讨了各序列的变化趋势及不同时间尺度下的变化特性，确定了各序列的突变点和存在的主要周期。结果表明，整体趋势除宾川站的月均蒸发量在缓慢增加外，其他站的月均蒸发量都在减少，元谋站蒸发量递减率最大。元江、潞江坝、元谋和宾川站存在的主周期分别为22，12，13和18年。这些关键数据为探求云南干热河谷的水文要素特性和水循环研究分析提供新的参考依据。
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| 关 键 词： | 干热河谷 蒸发量 多时间尺度分析 小波变换 |
| 收稿时间： | 2007-12-14 |
| 修稿时间： | 2008-2-18 |
Multiple-time-scale Wavelet Analysis of Evaporation of Yunnan Dry-hot Valley Region |
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| YANG Bao-hua,LI Jing,FAN Yi,GUO Kai-ying.Multiple-time-scale Wavelet Analysis of Evaporation of Yunnan Dry-hot Valley Region[J].Journal of Yunnan Agricultural University,2008,23(5):678-682. |
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| Authors: | YANG Bao-hua LI Jing FAN Yi GUO Kai-ying |
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| Institution: | 1.Key Laboratory for Water Resources and Water saving Irrigation, Yunnan Agricultural University, Kunming 650201, China;2.Faculty of Architectural Engineering, Yunnan Agricultural University, Kunming 650204，China |
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| Abstract: | In order to probe into unique valley hydrology cycle and evolution law,using Morlet complex wavelet transform,multiple-time-scale wavelet analysis of evaporation series of 4 typical hydrologic stations,including Yuanmou,Binchuan,Yuanjiang and Lujiangba stations of Yunnan dry-hot valley,was made.Based on the oscillation distribution maps of time-scale signals,the tendency and variation characteristics of evaporation series in different time scales were discussed and the main periods and abrupt changes were determined.The result showed that,the general trend of average evaporation of these stations decreased except that the average evaporation of Binchuan station increased slowly,while that of Yuanmou station declined faster than the other 2 stations.The main periods of evaporation series of Yuanjiang station,Lujiangba station,Yuanmou station and Binchuan station were 22,12,13 and 18 years,respectively.These crucial data could provide a reference to the research on hydrological elements and the analysis of the process of water resources cycle. |
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| Keywords: | dry-hot valley evaporation multiple-time-scale analysis wavelet transform |
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