Akademik Veri Yönetim Sistemi
4th International Civil Engineering & Architecture Conference, Trabzon, Türkiye, 17 - 19 Mayıs 2025, cilt.1, ss.986-991, (Tam Metin Bildiri)
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 the protection of various engineering projects against floods. Civil infrastructure such as storm sewers, storm water management ponds, culverts and bridges are commonly designed using IDF curves. In this study, IDF curves for Eastern Black Sea Basin (EBSB), the rainiest basin in Türkiye, were developed. The maximum rainfall intensity values for 14 rainfall durations (D=5, 10, 15, and 30 minutes, and 1, 2, 3, 4, 5, 6, 8, 12, 18 and 24 hours) were used. The data of 2 Meteorological Stations (Trabzon and Rize) of Turkish State Meteorological Service (MGM, in Turkish), of which observation durations were 60 and 80 years and located in EBSB, were employed. Since various studies have favored the use of Log Pearson Type 3 (LP3) Distribution for annual maximum precipitation data in Türkiye; this distribution was used for the analysis. The rainfall intensity values for each station and for 7 return periods (T = 2, 5, 10, 25, 50, 100 and 500 years) was calculated by LP3 Distribution. Multi-nonlinear regression analysis was carried out by using nine kinds of IDF formulas, which were taken by using various IDF formulae in the literature and newly generated formulae. In order to test the reliability of the functions, two criteria were used: The determination coefficient and the mean relative error. It has been concluded that the reliability of the results is high enough and that this study will motivate and open new horizons to detailed studies on IDF analysis.