Response mechanism of agricultural drought to meteorological drought in the Yellow River Basin

Dehe Xu, Menglong Wang, Ke Zhang, Qi Zhang, Shiwen Wu and Jingbao Fu

Agricultural Water Management, 2025, vol. 318, issue C

Abstract: Meteorological drought and agricultural drought interact through the land-air system and hydrological cycle. Understanding how the latter responds to the former is crucial for effective drought mitigation. This study aims to explore the spatially heterogeneous response mechanisms of agricultural drought to meteorological drought in the Yellow River Basin. Based on analyzing the characteristics of meteorological and agricultural drought, Pearson's correlation coefficient was used to evaluate the response time, and then a geographically weighted regression model was used for the first time to study the response mechanism, as it accounts for spatial heterogeneity in environmental influences. The results show: (1) Short-term meteorological droughts are concentrated in the southern basin, with longer durations in the west. In contrast, agricultural droughts occur more frequently in the southwest, but tend to persist longer in the northwest. (2) Response times vary across the basin, ranging from 5 to 12 months in the north, predominantly 12 months in the central region, and 11–12 months in the south. (3) Wind, maximum temperature, and minimum temperature strongly influence response time, with mean GWR coefficients of 0.2121, 0.0357, and −0.0301, respectively. Among them, precipitation, minimum temperature, and hours of sunshine had a negative effect on agricultural drought response time, and wind and maximum temperature had a positive effect. These findings provide a spatially explicit understanding of drought interactions and highlight the importance of targeted water resource and agricultural management strategies.

Keywords: Drought response time; Geospatial analysis; Geographically weighted regression; Climate drivers (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:318:y:2025:i:c:s0378377425004469

DOI: 10.1016/j.agwat.2025.109732

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