Comparison of Mann-Kendall and Sen’s innovative trend tests on measured monthly flows series of some streams in Euphrates-Tigris Basin

Yıl 2018, Cilt: 34 Sayı: 1, 78 - 86, 30.04.2018

MURAT Ay , Ömer Faruk Karaca , Adil Koray Yıldız

Öz

Low, medium and high values of a variable are a
significant issue in hydrological, meteorological and climatological events;
moreover, these values are used to decide various design parameters based on
scientific aspects and real applications around the world. In this context, a
new trend method recently proposed by Şen was used for monthly streamflow data
recorded at two different stations (2174- Murat River (Akkonak) and 2634-Garzan
Creek (Kozluk)) in Euphrates-Tigris Basin. The Mann-Kendall trend test was also
applied to the same data. It was seen that the stations had statistically
significant decreasing trend according to the Mann-Kendall and Şen trend test
at 95% confidence level; moreover, the proposed method provided an important
advantage in terms of graphically evaluation of low, medium and high values of
streamflow data.

Anahtar Kelimeler

Euphrates-Tigris Basin, Mann-Kendall, Streamflow, Şen’s trend test

Mann-Kendall ve Sen'in yeni eğilim testlerinin Fırat-Dicle Havzasındaki bazı akarsuların aylık akış serileri ile karşılaştırılması

Öz

Bir
değişkenin düşük, orta ve yüksek değerleri hidrolojik, meteorolojik ve iklimsel
olaylarda önemli bir konudur. Ayrıca, bu değerler dünyanın çeşitli yerlerindeki
bilimsel yönlere ve gerçek uygulamalara dayanan çeşitli tasarım parametrelerini
belirlemek için kullanılır. Bu bağlamda, Fırat-Dicle Havzasında iki farklı
istasyonda (2174-Murat Nehri (Akkonak) ve 2634-Garzan Çayı (Kozluk)) kaydedilen
aylık akarsu verileri için yakın zamanda Şen tarafından önerilen yeni bir eğilim
yöntemi kullanılmıştır. Aynı verilere Mann-Kendall eğilim testi de uygulandı.
İstasyonların, Mann-Kendall ve Şen eğilim testine göre istatistiksel olarak %95
güven düzeyinde önemli düşüş eğilimi gösterdİ. 
Önerilen yöntem, akış akışı verisinin düşük, orta ve yüksek değerlerinin
grafik olarak değerlendirilmesi açısından önemli bir avantaj sağladı.

Anahtar Kelimeler

Fırat-Dicle Havzasu, Mann-Kendall, Akım, Şen’s trend test

Kaynakça

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