The Intensity–Duration–Frequency (IDF) curves represent fundamental tools in the design of hydrotechnical works, urban infrastructure, and drainage systems, providing a direct link between rainfall intensity, event duration, and exceedance probability. This study presents a comprehensive statistical analysis of maximum precipitation values at various temporal scales, aiming to develop IDF curves based on robust probability distributions and parameter estimation methods with explicit analytical expressions. Commonly used distributions (e.g. Gumbel and Generalized Extreme Value – GEV) were compared, with particular attention given to the generalized GEV distribution, recognized for its flexibility in modeling extreme values. The results highlight the importance of explicit relationships for determining the parameters of IDF curves, which facilitate practical implementation and reduce the uncertainties associated with iterative estimation methods.
Ianculescu et al. (Mon,) studied this question.