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[1]LUO Yu,QIN Ningsheng,ZHOU Bin,et al.Change of Runoff in the Source Regions of the Yangtze River from 1961 to 2016[J].Research of Soil and Water Conservation,2019,26(05):123-128.

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Change of Runoff in the Source Regions of the Yangtze River from 1961 to 2016

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 05 Page number: 123-128 Column: Public date: 2019-09-06

Title:: Change of Runoff in the Source Regions of the Yangtze River from 1961 to 2016

Author(s):: LUO Yu^1,2, QIN Ningsheng^1,2, ZHOU Bin², LI Jinjian³, LIU Jia², WANG Chunxue², PANG Yishu²; 1. Institute of Plateau Meteorology, Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province, China Meteorological Administration, Chengdu 610072, China;
2. Climate Center of Sichuan Province, Chengdu 610072, China;
3. Chengdu University of Information Technology, Chengdu 610225, China

Keywords:: source area of Yangtze River; runoff; inter-annual variation; inter-decadal variation; intra-annual variation

CLC:: X121.2

DOI:: -

Abstract:: Based on the runoff data of 56 years of the source regions of the Yangtze River, we used methods of moving average, accumulative departure curve and sliding t test,concentration degree (period), wavelet analysis, combined qualitative and quantitative analysis to summarize the characteristics of the inter-annual and intra-annual, inter-decadal, mutation, periodic changes. The results showed that:during the period 1961-2016, runoff in the source area of the Yangtze River generally presented the increasing trend, and the runoff in the upper reaches of the river was more significant than that in the lower reaches. In the Tuotuohe station, which is located at the upper reaches, the unevenness, concentration rate, relative variation rate and absolute ration rate were higher than that those in the Zhimenda station. Annual runoff mutation occurred in 1996 in Tuotuohe station and in 2004 at Zhimenda station. There are periodic oscillation characteristics of 8~12 years and 3~4 years at the Tuotuohe station, 6~8 years and 3~4 years at the Zhimenda station.

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