[1]LIANG Shouzhen,SUI Xueyan,WANG Meng,et al.Multiple Time Scales Analysis of Dryness and Wetness Changes of the Yellow River Basin in the Past 50 Years Based on SPEI Data[J].Research of Soil and Water Conservation,2022,29(01):231-241.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 01
Page number:
231-241
Column:
Public date:
2022-02-20
- Title:
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Multiple Time Scales Analysis of Dryness and Wetness Changes of the Yellow River Basin in the Past 50 Years Based on SPEI Data
- Author(s):
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LIANG Shouzhen1, SUI Xueyan1, WANG Meng1, LI Xinhua2, DONG Hongyun2, YAO Huimin3, MA Wandong4
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(1.Institute of Agricultural Information and Economics,Shandong Academy of Agricultural Sciences,Ji'nan250100,China;2.Institute of Wetland Agriculture and Ecology,Shandong Academy of Agricultural Sciences,Ji'nan250100,China;3.Key Laboratory of East China Urban Agriculture,Ministry of Agriculture and Rural Affairs,Institute of Leisure Agriculture,Shandong Academy of Agricultural Sciences,Ji'nan250100,China;4.Satellite Environment Center,Ministry of Ecology and Environment,Beijing100094,China)
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- Keywords:
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SPEI; dryness and wetness change; multiple time scales; drought; Yellow River Basin
- CLC:
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P426.1
- DOI:
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- Abstract:
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The Yellow River Basin where water resources are lacking is an important economic region and ecological protective screen. Therefore, it is meaningful to research the dryness and wetness changes of the Yellow River Basin for reasonable management and use of water and sustainable development of the basin. In this study, the SPEI data from 1966 to 2015 were analyzed to acquire the characteristics of the dryness and wetness changes of the Yellow River Basin in the context of global warming through EOF and Mann-Kendall methods. Furthermore, the reasons inducing SPEI change were also discussed. The results showed that in the past 50 years, SPEI had changed temporally, but there were no obvious increase or decrease trends in SPEI, and the changes of dryness and wetness among regions were nonsynchronous; the correlation coefficient between SPEI and air temperature was small, and precipitation was the main factor determining SPEI in the Yellow River Basin; there were more droughts in summer and autumn than those in winter and spring, and compared with the western plateau and eastern plain, the Loess Platea in the Yellow River Basin had more droughts. El Niño can worsen the effects of droughts in the Yellow River Basin.