RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2016, Vol. 25 >> Issue (02): 292-299.doi: 10.11870/cjlyzyyhj201602015

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THE EVOLUTION CHARACTERISTICS OF PRECIPITATION IN THE PAST 61 YEARS AT THE LAKE CHANGDANGHU

PENG Jun-xiang1,2, WU Yong-nian3, HU Wei-ping1, DENG Jian-cai1   

  1. 1. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;
    2. Sino-Danish Center for Education and Research, University of Chinese Academy of Sciences, Beijing 100190, China;
    3. Taihu Basin Authority, Ministry of Water Resources, Shanghai 200434, China
  • Received:2015-05-26 Revised:2015-10-08 Online:2016-02-20
  • Supported by:
    the Control and Management of National water Pollution Science and Technology Major Projects. (2014ZX07101-011);the Chinese National Natural Science Foundation, (41271213);Key Deployment Program of Chinese Academy of Science, (KZZD-EW-10)

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Abstract: Based on annual precipitation observation data from Wangmuguan and Liyang monitoring stations during the period of 1953 to 2013, the evolution of annual precipitation of Lake Changdanghu in the past 61 years was systematically analyzed by using the methods of Mann-Kendall and Sperman's test, wavelet transform and time series analysis. Results showed that the average annual precipitation is 1115.1 mm in this area. The precipitation presented obviously seasonal dynamics during the whole year. The annual precipitation showed downward trend, and the majority of rainfall occurred in a normal year, the rainy year was nearly the same as the drier year in the last 61 years in Lake Changdanghu. The main period of annual precipitation is 9.5 years at Lake Changdanghu. The conclusion from this paper provided important references for flood control, utilization of water resource, water regulation scheme development and climate change adoption for the Lake Changdanghu.

Key words: annual precipitation, trends, wavelet Analysis, periodicity, non-parametric test

CLC Number: 

  • K903
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