Author(s): Wuxia Bi; Cheng Zhang; Dawei Zhang; Fan Wang; Weiqi Wang; Wenqing Lin

Linked Author(s): Cheng Zhang, Dawei Zhang

Keywords: Compound extreme event; Daily scale; Multi-indicators; Yangtze River Basin

Abstract: In recent years, compound extreme events have increasingly occurred globally. A new type of compound extreme event, drought-flood abrupt alternation (DFAA), has been reported multiple times, especially in China. According to our previous study, DFAA events in China mainly occurred in the southeastern part. As the third largest watershed in the world, Yangtze River Basin, has strategic significance for China’s socio-economic development. The DFAA events normally have negative effects on the agricultural production, eco-environment, etc. Therefore, this study explored the evolution characteristics of DFAA events in the Yangtze River Basin, which can help quantitively estimate the impact of climate change on one of the important grain bases in China. The results show that the occurrence of DFAA events has increased in the past 60 years, and the average annual area proportion covered by DFAA events has a statistically significant (P < 0.05) increasing trend in the Yangtze River Basin. The possible targeted regulation measures were proposed as well.

DOI: https://doi.org/10.3850/iahr-hic2483430201-498

Year: 2024