| 基于小波分析的大伙房水库流域降水周期分析 |
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| 引用本文： | 曹永强,张兰霞,都晓博,刘琳.基于小波分析的大伙房水库流域降水周期分析[J].水力发电,2011,37(4). |
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| 作者姓名： | 曹永强 张兰霞 都晓博 刘琳 |
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| 作者单位： | 1. 辽宁师范大学城市与环境学院,辽宁,大连,116029
2. 河海大学水文水资源与水利工程科学国家重点实验室,江苏,南京,210098 |
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| 摘 要： | 用降水距平和莫莱(Morlet)小波函数,对大伙房水库流域近50年来降水的季节变化和年际变化时间序列进行了小波分析.研究结果表明,近50年来,大伙房水库流域春、夏、秋、冬和年平均降水分别存在6,9,16,6a和l0 a的主周期.在主周期分析基础上,预测研究区在2005年之后未来一段时间季、年平均降水都不同程度、不同时间范围仍将处于降水偏多阶段.小波分析的时频局部化特性可展现降水时间序列的精细结构,为分析降水多时间尺度变化特征、短期降水预测等预防洪水灾害等关键问题研究提供了一种新途径.
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| 关 键 词： | Morlet小波分析 多时间尺度 降水周期 大伙房水库流域 |
Cycle Analysis on Precipitation in Dahuofang Reservoir Basin Based on Wavelet Analysis |
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| Cao Yonggiang,Zhang Lanxia,Hao Xiaobo,Liu Lin.Cycle Analysis on Precipitation in Dahuofang Reservoir Basin Based on Wavelet Analysis[J].Water Power,2011,37(4). |
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| Authors: | Cao Yonggiang Zhang Lanxia Hao Xiaobo Liu Lin |
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| Affiliation: | Cao Yongqiang1,Zhang Lanxia1,Hao Xiaobo2,Liu Lin1(1.School of Urban Planning and Environmental Science,Liaoning Normal University,Dalian 116029,Liaoning,China,2.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,Jiangsu,China) |
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| Abstract: | Based on the monthly rainfall data from 1956 to 2006,wavelet analysis was carried out on the seasonal and annual variation of precipitation in the past 50 years in Dahuofang Reservoir basin by precipitation anomalies and the Morlet wavelet function.The results show that the average precipitation in spring,summer,autumn,winter and year exists the primary cycle of 6 years,9 years,16 years,6 years and 10 years respectively,and the season and annual average precipitation after 2005 is predicted to be more than ... |
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| Keywords: | Morlet wavelet analysis multi-time scales precipitation cycle Dahuofang Reservoir basin |
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