Developing rainfall intensity-duration-freqency relationship for Basrah City

الملخص EN

The rainfall Intensity-Duration-Frequency (IDF) relationship is one of the most commonly used tools in water resources engineering, either for planning, designing and operating of water resource projects, or for various engineering projects against floods.

The purpose of this paper is to develop an empirical formula to estimate design rainfall intensity based on intensity –duration–frequency (IDF) curves for Basrah City.

These curves have been generated from a 31-year recorded rainfall data.

The study showed maximum intensities occur at shout duration large variations with return period, Furthermore ,it also notice ; at long duration there is no much difference in intensities with return period.