Trend Analysis of Streamflows at Some Gauging Stations Over the Kizilirmak River

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AY M., Kisi O.

TEKNIK DERGI, vol.28, no.2, pp.7779-7794, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 28 Issue: 2
  • Publication Date: 2017
  • Doi Number: 10.18400/tekderg.304034
  • Journal Name: TEKNIK DERGI
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.7779-7794
  • Keywords: Streamflow, Mann-Kendall test, sen trend test, Turkey, NONPARAMETRIC-TESTS, MANN-KENDALL, RAINFALL
  • Yozgat Bozok University Affiliated: Yes

Abstract

In this study, a new trend method recently proposed by Sen is used for monthly streamflow data of four different stations, Sefaatli, Kuylus, Salur Bridge and Bulakbasi, selected from the Kizilirmak Basin in Turkey. The Mann-Kendall trend test is also applied to the same data, and the results are discussed. According to the Mann-Kendall test, a significantly decreasing trend is found for the Sefaatli and Salur Bridge stations while there is no trend in the Kuylus and Bulakbasi stations at a significant level of 95%. Different trends are found for the low, medium and high streamflows of each station in view of the Sen trend test. As a result, it can be said that the proposed new method of Sen can identify the trends of low, medium, and high streamflows.