An extreme drought occurred in the Yangtze River Basin in 2022,inflicting huge impacts nationwide.To provide a reference for drought prevention and mitigation,this paper presents a comprehensive analysis of the drough...An extreme drought occurred in the Yangtze River Basin in 2022,inflicting huge impacts nationwide.To provide a reference for drought prevention and mitigation,this paper presents a comprehensive analysis of the drought in the Yangtze River Basin in terms of its characteristics,causes,impacts,and response strategies.It concludes that this extreme drought stood out by its long duration,wide impact range,and severe intensity,as a combined result of abnormal hightemperature weather and massive social water consumption.Serious impacts are observed in various fields of the economy,including agricultural irrigation,urban and rural water supply,power generation,and navigation.Finally,drought mitigation measures and effects are examined,and future drought response and mitigation strategies are proposed.展开更多
Drought is one of the most complicated natural hazards and is among those that pose the greatest socioeconomic risks. How long-term climate change on a large scale affects different types of drought has not been well ...Drought is one of the most complicated natural hazards and is among those that pose the greatest socioeconomic risks. How long-term climate change on a large scale affects different types of drought has not been well understood. This study aimed to enhance comprehension of this critical issue by integrating the run theory for drought identification, Mann-Kendall trend analysis, and partial correlation attribution methods to analyze global drought dynamics in 1901–2018. Methodological innovations include:(1) a standardized drought severity metric enabling cross-typology comparisons;and (2) quantitative separation of precipitation and temperature impacts. Key findings reveal that socioeconomic drought severity exceeded meteorological, agricultural, and hydrological droughts by 350.48%, 47.80%, and 14.40%, respectively. Temporal analysis of Standardized Precipitation Evapotranspiration Index (SPEI) trends demonstrated intensification gradients:SPEI24 (-0.09slope/100 yr)> SPEI01 (-0.088/100 yr)> SPEI06 (-0.087/100 yr)> SPEI12 (-0.086/100 yr). Climate drivers exhibited distinct patterns, with precipitation showing stronger partial correlations across all drought types (meteorological:0.78;agricultural:0.76;hydrological:0.60;socioeconomic:0.39) compared to temperature (meteorological:-0.45;agricultural:-0.38;hydrological:-0.27;socioeconomic:-0.18). These results quantitatively establish a hierarchical climate response gradient among drought types. The framework advances drought typology theory through three original contributions:(1)systematic quantification of cross-typology drought severity disparities;(2) precipitation-temperature influence partitioning across drought types;and (3) identification of socioeconomic drought as the most climate-decoupled yet fastest-intensifying type. This study refined drought typological theories and provides a methodological foundation for climate-resilient drought management planning.展开更多
基金funded by the National Key R&D Program of China(2018YFE0206400,2021YFC3000202)the National Natural Science Foundation of China(National Natural Science Foundation of China Grant No.42001039)the China Institute of Water Resources and Hydropower Research,Research and Development Support Program(JZ110145B0052021,F0203982012).
文摘An extreme drought occurred in the Yangtze River Basin in 2022,inflicting huge impacts nationwide.To provide a reference for drought prevention and mitigation,this paper presents a comprehensive analysis of the drought in the Yangtze River Basin in terms of its characteristics,causes,impacts,and response strategies.It concludes that this extreme drought stood out by its long duration,wide impact range,and severe intensity,as a combined result of abnormal hightemperature weather and massive social water consumption.Serious impacts are observed in various fields of the economy,including agricultural irrigation,urban and rural water supply,power generation,and navigation.Finally,drought mitigation measures and effects are examined,and future drought response and mitigation strategies are proposed.
基金support from the National Key Research and Development Program of China (2023YFC3006604)the MOE Engineering Research Center of Desertification and Blown-Sand Control (2024-A3-2)
文摘Drought is one of the most complicated natural hazards and is among those that pose the greatest socioeconomic risks. How long-term climate change on a large scale affects different types of drought has not been well understood. This study aimed to enhance comprehension of this critical issue by integrating the run theory for drought identification, Mann-Kendall trend analysis, and partial correlation attribution methods to analyze global drought dynamics in 1901–2018. Methodological innovations include:(1) a standardized drought severity metric enabling cross-typology comparisons;and (2) quantitative separation of precipitation and temperature impacts. Key findings reveal that socioeconomic drought severity exceeded meteorological, agricultural, and hydrological droughts by 350.48%, 47.80%, and 14.40%, respectively. Temporal analysis of Standardized Precipitation Evapotranspiration Index (SPEI) trends demonstrated intensification gradients:SPEI24 (-0.09slope/100 yr)> SPEI01 (-0.088/100 yr)> SPEI06 (-0.087/100 yr)> SPEI12 (-0.086/100 yr). Climate drivers exhibited distinct patterns, with precipitation showing stronger partial correlations across all drought types (meteorological:0.78;agricultural:0.76;hydrological:0.60;socioeconomic:0.39) compared to temperature (meteorological:-0.45;agricultural:-0.38;hydrological:-0.27;socioeconomic:-0.18). These results quantitatively establish a hierarchical climate response gradient among drought types. The framework advances drought typology theory through three original contributions:(1)systematic quantification of cross-typology drought severity disparities;(2) precipitation-temperature influence partitioning across drought types;and (3) identification of socioeconomic drought as the most climate-decoupled yet fastest-intensifying type. This study refined drought typological theories and provides a methodological foundation for climate-resilient drought management planning.
