Evaluating the Ubiquity of Thresholds in Rainfall?Runoff Response Across Contrasting Environments

Thresholds in precipitation-runoff relationships have been observed numerous studies using scatter plots comparing meteorological factors and hydrologic response metrics. Most thresholds reported the literature identified from between that quantify volumes or depths of water (e.g., total event rainfall) metrics capturing magnitude runoff ratio), with a strong emphasis on hillslopes catchments temperate humid environments. Knowledge gaps, however, remain regarding ubiquity across different climatic environments affect This study therefore aimed to evaluate for wide range derived event-scale rainfall-runoff analysis 21 sites spanning seven contrasting geographic areas. Specifically, quantifying rainfall depth, intensity, abstractions related evapotranspiration were considered, along describe timing magnitude, leading 4,557 being evaluated. While depth most sites, intensity also observed. Additionally, threshold behavior was shown be sensitive antecedent conditions over specific durations time preceding event. The large number evaluated this allowed development typology dynamics formulation hypotheses about dominant hydrological processes. may not only promote standardized descriptions but make intersite comparisons nonlinear easier.