Spatiotemporal Characteristics of Drought and Wet Events and Their Impacts on Agriculture in the Yellow River Basin

Qingqing Li, Yanping Cao, Shuling Miao and Xinhe Huang
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Qingqing Li: College of Geography and Environmental Science, Henan University, Kaifeng 475004, China
Yanping Cao: College of Geography and Environmental Science, Henan University, Kaifeng 475004, China
Shuling Miao: College of Geography and Environmental Science, Henan University, Kaifeng 475004, China
Xinhe Huang: College of Geography and Environmental Science, Henan University, Kaifeng 475004, China

Land, 2022, vol. 11, issue 4, 1-20

Abstract: Droughts and floods have proven to be threats to food security worldwide. This research used the standardized precipitation index (SPI) to examine the spatiotemporal characteristics of drought and wet events from 1961 to 2020 in the Yellow River basin (YRB). Grain yield data were combined to assess how drought and wet frequency have affected the agricultural system. The occurrence frequency of drought was greater than that of wetness in time, drought frequency decreased, and wetness increased. Spatially, the frequency of drought in all provinces except Shanxi was higher than that of wetness. The grain yield per unit area of the YRB was generally highest in Shandong province and lowest in Gansu province. The grain yield per unit area have shown a significant growth trend in the nine provinces of the YRB since 1961. Drought had a negative effect on the grain yield per unit area in each province, while wetness had a positive effect on the grain yield per unit area in all provinces except Shandong. In general, the influence of drought on grain yield per unit area decreased, while the influence of wetness on grain yield per unit area increased. The results indicate that human activities are effective against preventing and controlling drought and wet disasters and can provide a reference for other parts of the world.

Keywords: drought; wet; standardized precipitation index; agriculture; Yellow River basin (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (5)

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