[1]YAN Yaqiong,YUE Yuan,TANG Zhou,et al.Characteristics of Drought Evolution in the Huaihe River Basin Under the Background of Climate Change[J].Research of Soil and Water Conservation,2023,30(03):336-344.[doi:10.13869/j.cnki.rswc.2023.03.019]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 03
Page number:
336-344
Column:
Public date:
2023-04-10
- Title:
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Characteristics of Drought Evolution in the Huaihe River Basin Under the Background of Climate Change
- Author(s):
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YAN Yaqiong1, YUE Yuan2, TANG Zhou1, TANG Xuejiao1, SHEN Wei1, WANG Wenqing1, MENG Hanchun1, YAO Haitao1
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(1.Suqian Meteorological Bureau, Suqian, Jiangsu 223800, China; 2.Meteorological Observatory of Jilin Province, Changchun 130062, China)
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- Keywords:
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standardized precipitation index(SPI); Huaihe River Basin; theory of run
- CLC:
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P467
- DOI:
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10.13869/j.cnki.rswc.2023.03.019
- Abstract:
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[Objective]The Huaihe River basin is a main grain production base in China. It is important to understand the characteristics and extremes of drought evolution in the basin for scientific drought prevention and control. [Methods] Based on the precipitation data of the Huaihe River Basin from 1971 to 2015, the standardized precipitation index(SPI)of 3-month time scale was calculated, and the spatial and temporal evolution characteristics of drought and its characteristic variables were analyzed by combining the inverse distance weight spatial interpolation method, climatic tendency rate and theory of run. [Results](1)In different seasons, spring and autumn showed a trend of arid development, and the rate of autumn was significantly higher than that of spring. Summer and winter showed a trend of wetting, and the rate of summer was higher than that of winter.(2)The average frequency of drought in all seasons was about 30%. In terms of spatial distribution, the northern part of the basin was humidified and the southern part was arid in spring, the northern part of the basin was dry and the southern part was humidified in summer, the climatic tendency rate in autumn was negative in most areas, and the positive area only appeared in northern Jiangsu. In winter most areas showed a trend of humidification.(3)Among the drought characteristic variables, the spatial distribution characteristics of drought duration and drought frequency were opposite, the spatial distribution of peak intensity was consistent with drought duration and drought intensity in the northeast of the basin, compared with the drought duration and drought intensity, the high value of the peak intensity in the southeastern part of the basin shifted slightly to the southeast. [Conclusion] There was an obvious trend of dryness in autumn and wetness in winter and regional differences in the evolution of drought in spring and summer, and drought showed an extreme development trend in Huaihe River basin.