https://iaeme.com/Home/journal/IJCIET 26 editor@iaeme.com International Journal of Civil Engineering and Technology (IJCIET) Volume 12, Issue 11, November 2021, pp. 26-33, Article ID: IJCIET_12_11_003 Available online at https://iaeme.com/Home/issue/IJCIET?Volume=12&Issue=11 Journal Impact Factor (2020): 11.3296 (Calculated by GISI) www.jifactor.com ISSN Print: 0976-6308 and ISSN Online: 0976-6316 DOI: https://doi.org/10.34218/IJCIET.12.11.2021.003 © IAEME Publication GENERATION OF IDF CURVES IN ARID AND SEMI-ARID AREAS: CASE STUDY HURGHADA, EGYPT Dr. Neveen B Abd El-mageed 1 , Ahmed I Abdallah 2 and Dr. Elzahry F Mohamad 3 1 Associate Professor of Water Resources and Hydraulics, Civil Engineering Department, Faculty of Engineering at Shoubra, Benha University, Cairo, Egypt. 2 Master Student at Civil Engineering Department, Faculty of Engineering at Shoubra, Benha University, Cairo, Egypt. 3 Assistant Professor of Water Resources and Hydraulics, Civil Engineering Department, Faculty of Engineering at Shoubra, Benha University, Cairo, Egypt. ABSTRACT Intensity-Duration-Frequency (IDF) curves are commonly used in water resources projects and hydrological analyses. One of the most important requirements for creating IDF curves is the actual distribution of rainfall intensity during the period of rainfall, but usually short-duration rainfall records are rare in arid regions while daily rainfall data are available. Hydrologists can generate short-duration rainfall data from daily rainfall data through using the Natural Resources Conservation Service (NRCS) standard synthetic rainfall distributions. The main purpose of this paper is to show the procedure to be followed in developing the IDF curves using the daily rainfall data recorded at the Hurghada weather station. Frequency analysis of the observed rainfall records was performed using HyfranPlus software. The gamma distribution is the most widely accepted probability distribution in this research. Keywords: IDF, NRCS rainfall distributions, Rainfall intensity, arid regions. Cite this Article: Neveen B Abd El-mageed, Ahmed I Abdallah and Elzahry F Mohamad, Generation of IDF Curves in Arid and Semi-Arid Areas: Case Study Hurghada, Egypt, International Journal of Civil Engineering and Technology (IJCIET), 12(11), 2021, pp. 26-33. https://iaeme.com/Home/issue/IJCIET?Volume=12&Issue=11 1. INTRODUCTION Hurghada, Egypt, is one of the semi-arid regions of the Red Sea. The Red Sea coast has a dry climate and a scarcity of rainfall events, but recently it has witnessed increases in rainfall rates, which in some cases led to severe flash floods. For example, in 01 NOV 1994, the Eastern Desert received a large amount of rainfall 60mm [1]. Also, on November 16th, 17th and 18th, 1996, a heavy rainstorm of 40 mm occurred [2]. More recently, on March 9th, 2014 and on the 27th of October, 2016, heavy rainstorms hit several parts of Hurghada Road and El Gouna city