Flood Frequency and Temporal Variability Analysis of Yeşilırmak Basin Under Homogeneity and Change Point Criteria

İbrahim Halil Deger

doi:10.64808/engineeringperspective.1896337

Flood Frequency and Temporal Variability Analysis of Yeşilırmak Basin Under Homogeneity and Change Point Criteria

Abstract

In this study, flood frequency analysis was carried out for the Yeşilırmak Basin, Türkiye, using annual maximum flow series derived from daily discharge data recorded at 14 gauging stations. Homogeneity of the series has been examined by the tests of Pettitt’s, Standard Normal Homogeneity, Von Neumann Ratio, Buishand Range, and Cumulative Deviation. Change points were detected by Pettitt’s Test and the Standard Normal Homogeneity Test, and non-homogeneous series were divided accordingly. Temporal variabilities were investigated using the tests of Mann–Kendall, Spearman’s Rho and Sen’s Slope. Flood quantiles corresponding to return periods were estimated with the most appropriate probability distributions based on goodness-of-fit tests. Results indicated that 11 stations were homogeneous, while three stations were non-homogeneous in which 1993 was identified as a common change point year. Trend results revealed predominantly non-significant decreasing trends and negative trend slopes in the series. Gamma and Weibull distributions showed superior performance as most appropriate distributions. Due to divided series, flood magnitudes have been investigated in two cases. The first case has given larger flood magnitudes than the second case. In both cases, the stations in upper middle of the basin have higher flood magnitudes that contain more flood risk in the basin.

Keywords

Ethical Statement

Ethics committee approval was not required for this study because of there was no study on animals or humans.

Thanks

The General Directorate of State Hydraulic Works (DSI) is to be acknowledged for its contributions for providing streamflow data.

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Details

Primary Language

English

Subjects

Water Resources Engineering, Civil Engineering (Other)

Journal Section

Research Article

Authors

İbrahim Halil Deger ^*
0000-0001-6360-3923
Türkiye

Publication Date

March 12, 2026

Submission Date

February 23, 2026

Acceptance Date

March 10, 2026

Published in Issue

Year 2026 Volume: 6 Number: 2

DOI

https://doi.org/10.64808/engineeringperspective.1896337

IZ

https://izlik.org/JA44JL43RC

Cite

RIS / Bibtex

APA

Deger, İ. H. (2026). Flood Frequency and Temporal Variability Analysis of Yeşilırmak Basin Under Homogeneity and Change Point Criteria. Engineering Perspective, 6(2), 185-209. https://doi.org/10.64808/engineeringperspective.1896337

AMA

1.Deger İH. Flood Frequency and Temporal Variability Analysis of Yeşilırmak Basin Under Homogeneity and Change Point Criteria. engineeringperspective. 2026;6(2):185-209. doi:10.64808/engineeringperspective.1896337

Chicago

Deger, İbrahim Halil. 2026. “Flood Frequency and Temporal Variability Analysis of Yeşilırmak Basin Under Homogeneity and Change Point Criteria”. Engineering Perspective 6 (2): 185-209. https://doi.org/10.64808/engineeringperspective.1896337.

EndNote

Deger İH (March 1, 2026) Flood Frequency and Temporal Variability Analysis of Yeşilırmak Basin Under Homogeneity and Change Point Criteria. Engineering Perspective 6 2 185–209.

IEEE

[1]İ. H. Deger, “Flood Frequency and Temporal Variability Analysis of Yeşilırmak Basin Under Homogeneity and Change Point Criteria”, engineeringperspective, vol. 6, no. 2, pp. 185–209, Mar. 2026, doi: 10.64808/engineeringperspective.1896337.

ISNAD

Deger, İbrahim Halil. “Flood Frequency and Temporal Variability Analysis of Yeşilırmak Basin Under Homogeneity and Change Point Criteria”. Engineering Perspective 6/2 (March 1, 2026): 185-209. https://doi.org/10.64808/engineeringperspective.1896337.

JAMA

1.Deger İH. Flood Frequency and Temporal Variability Analysis of Yeşilırmak Basin Under Homogeneity and Change Point Criteria. engineeringperspective. 2026;6:185–209.

MLA

Deger, İbrahim Halil. “Flood Frequency and Temporal Variability Analysis of Yeşilırmak Basin Under Homogeneity and Change Point Criteria”. Engineering Perspective, vol. 6, no. 2, Mar. 2026, pp. 185-09, doi:10.64808/engineeringperspective.1896337.

Vancouver

1.İbrahim Halil Deger. Flood Frequency and Temporal Variability Analysis of Yeşilırmak Basin Under Homogeneity and Change Point Criteria. engineeringperspective. 2026 Mar. 1;6(2):185-209. doi:10.64808/engineeringperspective.1896337