RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2016, Vol. 25 >> Issue (03): 497-505.doi: 10.11870/cjlyzyyhj201603017

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EVOLUTION OF SPATIOTEMPORAL CHARACTERISTICS OF FLOODS AND DROUGHTS IN EAST CHINA FROM 1960 TO 2014

TANG Bao-qi1, YAN Jun-ping1, LI Shuang-shuang2, LIU Yong-lin1   

  1. 1. College of Tourism and Environmental, Shaanxi Normal University, Xi'an 710119, China;
    2. State Key Laboratory of Earth Surface Processes and Resource Ecology, Academy of Disaster Reduction and Emergency Management, Beijing Normal University, Beijing 100875, China
  • Received:2015-06-24 Revised:2015-09-10 Online:2016-03-20
  • Supported by:
    Ministry of Education, Humanities and SocialSciences project(Grant No. 15JJD790022);the National SocialScience Foundation of China (Grant No. 14AZD094)

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Abstract: Based on the meteorological data of the 89 stations in East China from 1960 to 2014, using the climate tendency rate, IDW spatial interpolation method and standardized precipitation index (SPI), we analyzed the variation characteristics of droughts and floods and discussed the differences between north and south parts of Huaihe Rive from 1960 to 2014. The results show: (1) In recent 55 years, the precipitation in East China was gradually decreasing from south to north, for the area north to the Huaihe River, precipitation showed a downward trend, while precipitation in the area south to the Huaihe River was on the rise. (2) The frequencies of droughts and floods in South and North of East China showed a reverse trend. The influence range of drought in north of Huaihe expanded, the flood decreased, the area to the south of Huaihe River showed an opposite pattern. (3) The frequencies of droughts and floods in South and North of East China showed the reverse trend. The influence sphere of drought in the north of Huaihe was expanding, while the flood was falling, south of Huaihe showed the opposite trend. (4) The spatial distribution of frequency of severe drought and flood in East China appear north-south reverse pattern, which is the frequency of drought was high in north (south) of Huaihe, while the flood frequency showed an opposite pattern.

Key words: flood and drought, standardized precipitation index(SPI), variation characteristics, East China

CLC Number: 

  • P426.616
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