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Characteristics of extreme precipitation in South China during April–July for early rice season

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Abstract

Extreme precipitation has significant impacts on human society and agriculture development under global climate change as well as severe effects on rice development. However, little research has been done on the characteristics of extreme precipitation in different rice growth stages. Taking the South China region as a case study, the characteristics of extreme daily precipitation in the early rice season (April–July) from 1960 to 2009 were investigated by using percentile method. Results indicated that extreme precipitation threshold increases since the tillering stage, and there is big difference between the first and the rest growth stages. Extreme precipitation is serious in the eastern part than in the western part of South China during the seeding and tillering stage, and reverse since the booting stage. Frequency of extreme precipitation increases in recent decades after the booting stage. Finally, flood risk regions form more easily in the coastal cities and the western part of South China in the 1990s and 2000s since the tillering stage.

Research Highlights

  • Extreme precipitation has significant impact on the rice production in South China region during the early rice period. However, characteristics of extreme precipitation in different rice growth stages are still unclear. The researchers use daily precipitation data (1960–2009) and percentile method to analysis the extreme precipitation distribution in South China region during April–July for early rice season.

  • The researchers found extreme precipitation is serious in South China region since tillering stage, and getting more serious when it comes to the rest of the growth stages. High extreme precipitation centers occur in different region during early rice period. Flood protection and crops planning should focus on different region for different stages. Data analysis also show that extreme precipitation is serious in the eastern part than in the western part of South China during the seeding and tillering stage, and reverse since the booting stage. Frequency of extreme precipitation increases in recent decades and more flood risk region form in the coastal cities. Crop planning and disaster managements in South China during early rice period need for careful consideration of different flood risk region in different stages.

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Acknowledgements

This research was supported by the National Youth Natural Science Foundation of China (Grant No. 41705092) and China Guangdong Provincial Natural Science Foundation (Grant No. 2017A030310146).

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Authors and Affiliations

  1. College of Agriculture, South China Agricultural University, Guangzhou, 510 642, China

    Liji Wu & Fei Hu

  2. College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510 642, China

    Li Xie

Authors
  1. Liji Wu
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  2. Fei Hu
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  3. Li Xie
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Contributions

Under supervision by Prof. Feihu, Liji Wu made substantial contributions to the conception and design of the work; also performed data analysis and calculations, developed analysis of extreme precipitation distribution in South China region during the early rice period. Li Xie made contribution to the calculations of precipitation data and provided editing and writing assistance.

Corresponding author

Correspondence to Fei Hu.

Additional information

Communicated by Kavirajan Rajendran

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Cite this article

Wu, L., Hu, F. & Xie, L. Characteristics of extreme precipitation in South China during April–July for early rice season. J Earth Syst Sci 129, 189 (2020). https://doi.org/10.1007/s12040-020-01466-1

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  • DOI: https://doi.org/10.1007/s12040-020-01466-1

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