[1]GUAN Yue,HE Qijin,LIU Jiahong,et al.Temporal and Spatial Variation Characteristics and Risk Assessment of Summer Maize Drought Disasters in the North China Plain[J].Research of Soil and Water Conservation,2023,30(02):267-273.[doi:10.13869/j.cnki.rswc.2023.02.027]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 02
Page number:
267-273
Column:
Public date:
2023-03-10
- Title:
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Temporal and Spatial Variation Characteristics and Risk Assessment of Summer Maize Drought Disasters in the North China Plain
- Author(s):
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GUAN Yue1,2, HE Qijin1,3, LIU Jiahong1, CHEN Xiao1, FAN Qian2, MENG Qingyi2, LIU Xiang2, LIU Fei2
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(1.College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; 2.Qianxinan Prefecture Meteorological Bureau, Xingyi, Guizhou 562400, China; 3.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing 210044, China)
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- Keywords:
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North China Plain; summer maize; drought; information diffusion theory; risk
- CLC:
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S513; S423
- DOI:
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10.13869/j.cnki.rswc.2023.02.027
- Abstract:
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Agro-meteorological disasters tended to expand year by year and occurred more frequently in the context of climate change. Drought not only covers a wider range but also lasts longer compared with the other agro-meteorological disasters, which has the greatest impact on agricultural production. In order to scientifically cope with summer maize drought and ensure high and stable yield of summer maize, the characteristics and risk of drought of summer maize were analyzed by using the crop water deficit index(CWDI), based on the meteorological data from 43 weather stations in the North China Plain from 1980 to 2019. The characteristics of drought in the different growth period of summer maize were identified by the frequency and the stations ratio. Moreover, the risk of drought was evaluated by using the theory of information diffusion and the analytic hierarchy process. The results indicated that:(1)the slight drought was the main drought type in the North China Plain with obvious differences in stages; the tasseling-milking stage was severely affected by drought, with an average of 28 droughts occurring at each station during 40 years, and the average drought station ratio was 69.5%;(2)summer maize suffered more serious effects of drought in the period from 2010 to 2019, and the characteristics of drought showed successive occurrence and spatial expansion;(3)the risk of drought was higher in the west and lower in the east; the high-risk and the second-high-risk areas of drought happened in most of Henan Province and southern Hebei Province, and their proportions of areas were 12.1% and 23.4%, respectively. In summary, the drought of summer maize in the North China Plain has a trend of aggravation and diffusion, and the drought is likely to occur in the tasseling milking stage, most of Henan and the south of Hebei are high drought risk areas, so drought prediction, monitoring and risk prevention and control should be strengthened.