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Arid Land Geography >

2023 , Vol. 46 >Issue 5: 689 - 699

DOI: https://doi.org/10.12118/j.issn.1000-6060.2022.425

Climatology and Hydrology

Spatiotemporal distribution characteristics of rainstorm and risk assessment of rainstorm disasters in Shanxi Province from 1957 to 2019

  • Lele LI ,
  • Jinlong CHAO ,
  • Deyi ZHAO ,
  • Haojie LI ,
  • Lindong WU ,
  • Jiajun LI
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  • 1. School of Geographical Sciences, Taiyuan Normal University, Jinzhong 030619, Shanxi, China
    2. Gujiao Meteorological Bureau, Taiyuan 030200, Shanxi, China
    3. Shanxi Meteorological Information Center, Taiyuan 030600, Shanxi, China

Received date: 2022-08-29

  Revised date: 2022-10-07

  Online published: 2023-06-05

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Abstract

Wavelet analysis and other methods were used to analyze the spatiotemporal distribution characteristics of rainstorm in Shanxi Province of China based on the daily precipitation data of 27 meteorological stations in Shanxi Province from 1957 to 2019. Based on the theory of natural disaster, the decision analysis method (AHP) is used to conduct the risk assessment of rainstorm disasters. The following results were obtained: (1) Regarding the timescale, the time of rainstorm has presented periodicity and seasonality. The interannual variation of rainstorm has four-timescale oscillations of 4 years, 9 years, 14-15 years, and 27-28 years. The oscillation period shortened, and the frequency shows an increasing trend. Rainstorm season uneven distribution mostly concentrated in the summer and the probability of the formation of rainstorm disasters was great. The number of cumulative rainstorm days between June and August each year accounted for 85.23% of the total, with July accounting for the largest proportion of 45.18%. (2) Regarding the spatial scale, the rainstorm mostly occurs in the central and southern parts and the mountainous areas with higher altitudes, presenting a decreasing trend from southeast to northwest and obvious regional differences. The heavy rainfall and the amount of rainstorm in the south area show a high probability than the north area with Hengshan as the boundary, among which the annual average rainstorm is more than 65 mm in Yuanqu, Wutaishan, and Yangcheng meteorological stations, and the number of cumulative rainstorm days is over 60 days. (3) The result of the assessment of rainstorm disaster risk shows that the comprehensive risk classification of rainstorm disaster in Shanxi Province shows a decreasing trend from south to north. The northeast of the Yuncheng Basin belongs to the high-risk area, while the northeast and northwest of Shanxi Province belong to the low-risk area. The rest belong to the medium-risk and the sub-high-risk areas.

Key words： rainstorm; wavelet analysis; spatiotemporal distribution; disaster risk assessment; Shanxi Province

Cite this article

Lele LI , Jinlong CHAO , Deyi ZHAO , Haojie LI , Lindong WU , Jiajun LI . Spatiotemporal distribution characteristics of rainstorm and risk assessment of rainstorm disasters in Shanxi Province from 1957 to 2019[J]. Arid Land Geography, 2023 , 46(5) : 689 -699 . DOI: 10.12118/j.issn.1000-6060.2022.425

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