摘要
为了分析宜昌水文站径流演变规律,利用宜昌站1950~2007年实测日均径流量资料,采用MATLAB编程,运用复Morlet小波方法对其径流年际变化和洪枯季节变化进行多时间尺度分析,并剖析了不同尺度下的变化周期。计算出了宜昌水文站年均径流量、汛期与枯水期丰枯交替的时间尺度和主周期。结果表明,1950~2007年不同时间尺度下的演变规律较显著,但其水文规律的长时间尺度结构和记忆有待于进一步分析与探讨。
In order to study the evolution law of runoff at Yichang Hydrological Station,on the basis of the measured data of daily runoff at Yichang Hydrologic Station on Yangtze River during 1950～2007,the annual and seasonal evolution laws in multi-temporal scales were analyzed by Morlet wavelet method,and the variation periods were evaluated as well.The main period and time scale of wet and dry period alternation and the average annual runoff at Yichang Hydrologic Station was calculated.The results showed that the evolution laws were obvious in different time scales during 1950～2007,and further analysis and discussion on the long-term time scale structure and memory of hydrological laws should be carried out.
出处
《人民长江》
北大核心
2011年第17期24-27,共4页
Yangtze River
基金
国家自然科学基金创新研究群体基金项目“流域水循环模拟与调控”(51027066)
湖北科技攻关项目(A2010-107e)
关键词
径流演变规律
小波分析
丰枯
周期
宜昌站
evolution laws of runoff
Morlet wavelet
dry and wet period
period
Yichang Station
