Development of a New Event-Based Rainfall-Runoff Equation Based on Average Rainfall Intensity During an Event

Abstract Event-based rainfall-runoff models are practical tools commonly used to predict catchments’ response a rainfall event. However, one of the main concerns is that characteristics rain events neglected in model development. This paper develops novel event-based equation incorporate into account. The performance new evaluated based on root mean square error, Nash–Sutcliffe efficiency coefficient, and per cent bias for 13,339 between 2005 2020 over 23 catchments across New Zealand Australia with oceanic, mediterranean, tropical, subtropical, semiarid climates. Compared previous models, shows an improvement runoff estimation almost all case studies. Furthermore, considering simple, efficient, takes event duration account, has potential become robust alternative method conventional curve number hydrological engineering projects.