%0 Journal Article
%T Structure and Long-term Memory of Discharge Series in Yangtze River<br>长江干流径流的时序结构与长期记忆
%A WANG Guojie
%A JIANG Tong
%A CHEN Guiya
%A <br>王国杰
%A 姜彤
%A 陈桂亚
%J 地理学报
%D 2006
%I 
%X Based on the long-term monthly discharge series of Yichang, Hankou and Datong stations, this paper has explored the discharge series structure of periodicity, trend and abrupt changes as well as its long-term momery with Singular Spectum Analysis, and Detrended Fluctuation Analysis in employment. The results revealed that: 1) there is a significant 15a periodicity in the discharge series of the Yangtze River, and the 15a periodicity has been disturbed since the 1970s; 2) two abrupt and negative changes of Yichang series respectively in 1926 and 1970 have been detected in Hankou series in 1954; two abrupt changes occurred in Datong series respectively in 1955 and 1988, the former negative and the latter positive; and 3) the performance of DFA revealed a long memory in the discharge series of the Yangtze River, and the larger the upslope contributing area is, the stronger the long memory, which exhibits a cumulative effect.
%K discharge series
%K time series structure
%K long-term memory
%K Yangtze River<br>径流序列
%K 时序结构
%K 长期记忆
%K 长江
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=F7B5B947C24B9D649491012214E4BEF4&aid=68E85C7770D67412&yid=37904DC365DD7266&vid=1D0FA33DA02ABACD&iid=CA4FD0336C81A37A&sid=F4B561950EE1D31A&eid=014B591DF029732F&journal_id=0375-5444&journal_name=地理学报&referenced_num=8&reference_num=59