Determination of the IDF curves in Igueldo-San Sebastián. Comparison of different methods

[EN] Intensity-duration-frequency curves (IDF) are a fundamental tool in hydrological engineering. The work presented in this manuscript was made with the 88-year precipitation series recorded every ten minutes at the Igueldo (San Sebastián) weather station. After verifying the homogeneity and non stationarity of the series, IDF curves were obtained through a frequency analysis (FA) made with the Hydrognomon programme. Those curves were compared with those estimated from the AF of the simulated series with the Modified Bartlett-Lewis (MBL) model and with the Témez equation. The objective of this work is the evaluation of these last two methodologies. Two precipitation characteristic hyetographs were generated with the IDF curves obtained with the three methods. The curves and hyetographs obtained by Témez gave a good fit starting from return periods, T, of over 20 years. The results obtained from the simulated series with MBL were not as satisfactory.[ES] Las curvas de intensidad-duración-frecuencia (IDF) son una herramienta fundamental en ingeniería hidrológica. Se ha partido de la serie de precipitación de 88 años registrada cada diez minutos en la estación meteorológica de Igueldo (San Sebastián). Después de aplicar varios test para comprobar la homogeneidad y la no estacionariedad de la serie de precipitación, se determinaron las curvas IDF mediante un análisis de frecuencia con el programa Hydrognomon. Dichas curvas se compararon con las obtenidas a partir de la serie simulada con el modelo estocástico de Barlett-Lewis Modificado (MBL) y con las estimadas mediante la ecuación de Témez. El objetivo de este trabajo es la evaluación de estas dos últimas metodologías. Las curvas y los yetogramas generados con la expresión de Témez presentaron un buen ajuste a partir de periodos de retorno, T, mayores a 20 años. 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