Progress and prospects in drought propagation research part I: Meaning, characteristics, types, and research methods
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Abstract:
Based on the review of the concept and connotation of drought propagation, a detailed definition of the entire process of drought propagation is provided and the accumulation, attenuation, lagging, and lengthening characteristics of drought propagation are expanded on. Progress in the aspects of accumulation and lag is emphasized. Drought propagation is classified into different types based on the process and spatiotemporal characteristics. The statistical methods, including linear regression, logarithmic function, wavelet analysis, Copula function, causal analysis, Bayesian network, and random forest, as well as hydrological simulation methods, including single hydrological model simulation and multiple model ensemble simulation, are summarized and discussed regarding their applications in drought propagation research.
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