雅鲁藏布江河川径流变化的季节性规律研究  

Rule of the Seasonal Runoff Variation in the Yarlung Zangbo River

作　　者：钱晓燕[1] 袁鹏[1,2] 邵骏[1] 颜志衡[1] 

机构地区：[1]四川大学水利水电学院,四川成都610065 [2]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《水资源与水工程学报》2010年第1期29-33,共5页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金资助项目(40901022)

摘　　要：利用雅鲁藏布江干流奴下水文站1956-2008年实测径流序列资料,采用Morlet小波分析雅鲁藏布江干流径流年际变化和季节性变化的多时间尺度演变规律,揭示了不同尺度下径流变化周期。结果表明：雅鲁藏布江流域年径流和各季节径流存在8-10 a左右时间尺度的丰枯交替,表现出明显的周期特征,其次14-16 a左右时间尺度的周期特征也较明显。研究还发现,雅鲁藏布江夏季径流量占年径流量的53.62%,夏季径流变化趋势与年径流具有较大相似性,不同时间尺度的周期特征之间有不同程度的吻合,说明夏季径流较大程度的控制着年径流。Based the measured runoff data from1956 to 2008 of the NuXia hydrological station in Yarlung Zangbo River Basin,Morlet wavelet analysis was introduced and applied to analyze the spatial structure and the multi-time scale characteristics of seasonal and annual runoff.The periodic oscillation of runoff variation changed at different time scales along the time series.The result shows that there are obvious periodic oscillation of 8~10 a and 14~16 a for both seasonal and annual runoff variation.At the same time,the result also shows that the summer runoff accountes for 53.62% of the annual runoff.The variation trend of summer runoff is similar with that of the annual runoff and both of them have the comparable main periods.

关 键 词：水文 小波分析 径流变化 雅鲁藏布江 

分 类 号：TV211[水利工程—水文学及水资源] P333[天文地球—水文科学]