Drought is one of the most extensive natural disasters affecting human society. It spreads through land–atmosphere system and hydrological cycle, and evolves into different types of drought, such as hydrological drought, agricultural drought, socio-economic drought, groundwater drought and ecological drought. Extensive recent research has explored classifications, methods, characteristics, driving factors, but gaps remain in summarizing the latest concepts and research methods on drought propagation. Therefore, this study first introduces the types of drought propagation, summarizes the previous and latest drought propagation classifications, and supplements the reviews on the propagation of socioeconomic drought. Secondly, the research methods and the characteristic parameters of drought propagation are summarized, especially the spatial and internal propagation are extended. Thirdly, from the perspective of driving forces for drought propagation, this study summarizes the impact of natural factors (such as precipitation, evapotranspiration, snow, slope, vegetation, etc.) and human factors (such as reservoirs, irrigation, ecological project, urbanization, etc.) on drought propagation. Finally, the challenges of existing research and future research directions of drought propagation are summarized. This study expected to be useful for understanding the mechanism of drought propagation, so as to strengthen drought monitoring and forecasting, improve comprehensive drought resistance and improve water resources management.

中文翻译：

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干旱蔓延的最新进展：综合综述


干旱是影响人类社会最广泛的自然灾害之一。它通过陆气系统和水文循环传播，并演变为不同类型的干旱，如水文干旱、农业干旱、社会经济干旱、地下水干旱和生态干旱。近年来，对干旱蔓延的分类、方法、特征、驱动因素进行了广泛的研究，但在总结干旱蔓延的最新概念和研究方法方面仍然存在差距。因此，本研究首先介绍了干旱传播的类型，总结了以前和最新的干旱传播分类，并补充了对社会经济干旱传播的综述。其次，总结了干旱传播的研究方法和特征参数，特别是扩展了空间和内部传播。第三，从干旱蔓延驱动力的角度，总结了自然因素（如降水、蒸散、积雪、坡度、植被等）和人为因素（如水库、灌溉、生态工程、城市化等）对干旱蔓延的影响。最后，总结了干旱传播的现有研究挑战和未来的研究方向。本研究有助于理解干旱传播的机制，从而加强干旱监测和预报，提高综合抗旱能力，改善水资源管理。