Trend assessment of annual instantaneous maximum flows in Turkey

A comprehensive evaluation of trends in annual instantaneous maximum flows (AIMF) from 153 gauge stations located in 26 river basins in Turkey is presented. Two traditional non-parametric trend tests, the Mann-Kendall (MK) and Spearman's rho (SR), are used to quantify the significance of trends...

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Bibliographic Details
Published in:Hydrological sciences journal 2019-05, Vol.64 (7), p.820-834
Main Authors: Yilmaz, Muhammet, Tosunoglu, Fatih
Format: Article
Language:English
Subjects:
Annual
Clusters
Mann-Kendall test
maximum flows
River basins
Rivers
Sen's slope
Sen's trend method
Spearman's rho
Stations
Tests
trend analysis
Trends
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Summary:A comprehensive evaluation of trends in annual instantaneous maximum flows (AIMF) from 153 gauge stations located in 26 river basins in Turkey is presented. Two traditional non-parametric trend tests, the Mann-Kendall (MK) and Spearman's rho (SR), are used to quantify the significance of trends, while Sen's slope method is applied to determine the magnitude of trends. The traditional tests indicate that the AIMF records of 57 stations showed statistically decreasing trends, while those of six stations showed an increasing trend. Sen's trend method, which provides more detailed assessment of the trends in different clusters (low, medium and high), was applied to the AIMF series and the results were compared with traditional tests. Sen's trend method indicated that all flow clusters at nine stations have increasing or decreasing trends, although no significant trend was detected by the MK and SR tests.
ISSN:0262-6667
2150-3435
DOI:10.1080/02626667.2019.1608996