ABSTRACT Rainfall–runoff modelling has always been of great importance in hydrology. Recently, the Event-Based Approach for Small and Ungauged Basins (EBA4SUB) model, based on the instantaneous unit hydrograph (IUH) formulation, was released. The EBA4SUB model was originally developed considering only the surface flow, and in this work it has been generalized considering also the subsurface flow. The aim is to make EBA4SUB applicable both for Hortonian and/or for Dunne-Black mechanisms, proposing the so-called Generalized EBA4SUB model (GEBA4SUB). Here, GEBA4SUB and EBA4SUB are compared at the event scale, using observed rainfall–runoff events, and in estimating design discharge, using extreme value observations. In both cases, the results suggest that GEBA4SUB could outperform EBA4SUB, with improvements from 15% to over 100%.

中文翻译：

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考虑地表和地下流的 EBA4SUB 降雨-径流模型的推广

摘要 降雨-径流建模在水文学中一直非常重要。最近，发布了基于瞬时单位水文图 (IUH) 公式的小型和未测量盆地的基于事件的方法 (EBA4SUB) 模型。EBA4SUB 模型最初只考虑地表流而开发，在这项工作中，它也考虑了地下流。目的是使 EBA4SUB 适用于 Hortonian 和/或 Dunne-Black 机制，提出所谓的广义 EBA4SUB 模型 (GEBA4SUB)。在这里，GEBA4SUB 和 EBA4SUB 在事件尺度上进行了比较，使用观测到的降雨-径流事件，并在估计设计流量时使用极值观测。在这两种情况下，结果表明 GEBA4SUB 可以胜过 EBA4SUB，改进幅度从 15% 到 100% 以上。