Derivating rainfall intensity - duration - frequency curves from daily data in Saveh hydro-meteorological station

One of the most important parameters for design of hydraulic constructions is standard project storm which is derived from IDF curves for specific durations and return periods. The previous methods to estimate IDF curves are time consuming. In addition، they required many input parameters that tend to reduce their reliability. In previous methods، rainfall data should be recorded in different durations to extract the IDF curves. In some regions، only 24-hour rainfall data are recorded that they cannot build the IDF curves. In this study، temporal scaling properties of rainfall were used to extract the IDF curves for short durations from daily rainfall data. The used method has less complex stages and less number of parameters compares to previous methods. The proposed method was used in Saveh hydro-meteorological station as a case study and the results indicated its reasonable accuracy.