Water Science and Engineering 2011, 4(2) 121-132 DOI:   10.3882/j.issn.1674-2370.2011.02.00  ISSN: 1674-2370 CN: 32-1785/TV

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Poyang Lake Basin
extreme streamflow events
directional statistic
peaks over threshold
Mann-Kendall test
Guangju ZHAO Jing LI
Article by Peng
Article by TIAN
Article by Guangju ZHAO Jing LI
Article by Kun TIAN

Extreme value analysis of streamflow time series in the last half century in the Poyang Lake Basin, China

Peng TIAN1,Guang-ju  ZHAO2,Jing LI1,Kun TIAN3

1.College of Water Resources and Architectural Engineering, Northwest A&F University,          Yangling 712100, P. R. China;
Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, P. R. China;
2.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, P. R. China;
3.State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, P. R. China


Climate change and intensive human activities are threatening water resource systems throughout the world. The water system in Poyang Lake Basin is especially vulnerable to these impacts due to the human influences, climate changes and interaction between Yangtze River and Poyang Lake. In recent decades, more and more studies have focused on the extreme hydro-meteorological events. By use of observed records of Poyang Lake Basin for nearly 50 years, the occurrence, frequency and changing trends of extreme streamflow indices (including annual maximum flow, peak-over-threshold flow indices and low flows) are analyzed for ten hydrological stations. Results indicate that most annual maximum flows occurred from April to June, highly attributed to the Southeast Asian summer monsoons, whereas the annual minimum flow concentrated between January and February. As for the low flow indices, (Annual minimum flow, Annual minimum 7-day flow, and Annual minimum 30-day flow) a significant increasing trend was detected in most parts of the Poyang Lake Basin. The trends illustrate the potential effects of climate change and human activities on the hydrological cycle over Poyang Lake Basin.

Keywords Poyang Lake Basin   extreme streamflow events   directional statistic   peaks over threshold   Mann-Kendall test  
Received 2010-07-09 Revised 2011-05-04 Online: 2011-10-09 
DOI: 10.3882/j.issn.1674-2370.2011.02.00

Major Science and Technology Program for Water Pollution Control and Treatment in China;Major Science and Technology Program for Water Pollution Control and Treatment in China

Corresponding Authors: Jing LI
Email: lijinglee@tom.com
About author:



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