Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

Yazarlar: Hatice ÇITAKOĞLU, Vahdettin DEMİR, Tefaruk HAKTANIR

Konular:İnşaat Mühendisliği

DOI:10.28948/ngumuh.341711

Anahtar Kelimeler:L−Moments,Flood,Grid method,Radial−based function

Özet:    In this study, Regional Frequency Analysis of annual flood peaks (AFP) series of natural streams discharging to the Black Sea using AFP series recorded 52 stream-gauging stations is done by L-Moments method. Application of method performed by using computer program provided by Hosking reveals that working area including five major basins cannot be treated as a single homogeneous region as a whole (H1=13.6>>1.0). Taking into consideration physiographical and hydrological peculiarities of these basins and according to H1 criteria, working area is divided into 11 different homogeneous regions. According to ZDIST goodness-of-fit criterion, Generalized Normal Distribution is determined to be the best probability distribution in five of eleven sub-regions and Generalized Extreme Values, Pearson Type 3, Generalized Logistic distributions are found to be the best in three, two, and one sub-regions, respectively. As a result of index-flood frequency analysis with these distributions, regional annual flood peaks maps covering range of return periods from 2 to 1000 years are produced by grid method for working area.

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