Comparative Analysis of Developed Rainfall Intensity–Duration–Frequency Curves for Erbil with Other Iraqi Urban Areas

Water

卷:14

Aumed Rahman M Amen¹  Mehmet Ishak Yüce²  Dalshad Ahmed Kareem³  Michał Szydłowski⁴  Andam Mustafa⁴ 

[1] Department of Civil Engineering, Faculty of Engineering, Soran University, Soran 44008, Iraq;

[2] Department of Civil Engineering, Gaziantep University, Gaziantep 27310, Turkey;

[3] Erbil Technology College, Erbil Polytechnic University, Erbil 44001, Iraq;

[4] Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland;

关键词: extreme rainfall;    rainfall intensity;    IDF curves;    Gumbel distribution;    Log-Pearson Type III distribution;    frequency analysis;   

DOI  :  10.3390/w14030419

来源: DOAJ

【 摘 要 】

Rainfall Intensity–Duration–Frequency (IDF) relationships are widely used in water infrastructure design and construction. IDF curves represent the relationship between rainfall intensity, duration, and frequency, and are obtained by analyzing observed data. These relationships are critical for the safe design of flood protection structures, storm sewers, culverts, bridges, etc. In this study, the IDF curves and empirical IDF formulas for the city of Erbil were developed for the first time by employing the annual maximum rainfall data for a period of 39 years (1980–2018), which is the only available recorded data. Statistical techniques such as Gumbel and Log-Pearson Type III (LPT III) were utilized to determine the IDF curves and empirical equations from daily rainfall data for several standard durations and return periods. The correlation between the rainfall intensities obtained from IDF curves and the empirical formula presented a reliable match, with a coefficient of determination of (R² = 1). The results were compared to previously developed IDF curves and empirical formulas in Iraqi cities to show their reliability. Moreover, the results can be an initial step for authorities to establish required guidelines in the studied area, and in the design process of the storm water infrastructure of urban basins in the future.

【 授权许可】

Unknown