In this study, it is understood that hydrological drought has an increasing trend in the Autumn (September–November) season in all states (Ethiopia, Sudan, and Egypt).
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Long-term hydrological drought monitoring and trend analysis in Blue Nile River basin.
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The sentences
However, the trend analysis revealed that an increasing drought trend was observed in the Autumn season across all stations, while a positive trend characteristic of a wet condition was observed in the remaining seasons.
It is observed that the drought has a significant trend from September to March and a wet trend from April to August.