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Orta Karadeniz Bölgesi Yağış Değişimlerinin İstatistiksel ve Grafiksel Yaklaşımlarla Analizi

Year 2024, Volume: 7 Issue: 5, 2263 - 2283, 10.12.2024

Abstract

Hidrolojik değişkenlerin en önemlilerinden biri yağışlardır. Yağışın değişkenliğinin bilinmesi su yapılarının tasarım, yapım ve işletmesi açılarından hem de tarım için çok önemlidir. Bunun yanında, kuraklık analizlerinde de hidrolojik verilerin ve özelikle yağış değişkenliğinin belirlenmesi gereklidir. Hidrolojik değişkenlerin trend hesaplamaları gelecek ile ilgili yapılan çeşitli çalışmalarda önemli bir faktördür. Hidrolojik değişkenlerin zaman serilerinde meydana gelebilen tarihsel değişiklerin incelenmesinde çok sayıda istatiksel teknikler oluşturulup kullanılmaktadır. Klasik istatistiksel yöntemler incelenecek zaman serilerine ilişkin birçok varsayıma dayanmaktadır. Zaman serilerindeki değişikleri analiz etmek için kullanılan istatistiksel yöntemlerdeki varsayımları azaltmanın ve istatistiksel yaklaşım sonuçlarının daha güvenilir hale getirmenin bir yolu grafiksel ve istatistiksel yöntemlerin birlikte kullanılması olabilir. Bu çalışmada Orta Karadeniz bölgesinde bulunan Samsun, Ordu, Çorum, Amasya ve Tokat istasyonlarının 1960-2015 yılları arasında yıllık toplam yağış trend analizi hem klasik istatistiksel yöntem hem de grafiksel yöntemlerle yapılmıştır. Bu amaçla, tarihsel yağış değişikliklerini analiz etmek için klasik istatistiksel Mann-Kendall yönteminin yanı sıra veri noktalarının aşım ve aşım dışı sayıları arasındaki farkın rafine edilmiş kümülatif toplamı yöntemi, yenilikçi Şen ve Yenilikçi Şen’in modifiye edilmiş Yenilikçi Trend Değişim Kutuları grafik yöntemleri kullanılmıştır. İstatistiksel yöntem olan Mann-Kendall yönteminde tespit edilemeyen gizli trendlerin, kümülatif toplamı yöntemi ve Yenilikçi Trend Değişim Kutuları grafik yöntemleri ile değişik aralıklarda trendlerin belirlenebildiği görülmüştür. Yapılan çalışma sonucunda, grafiksel ve istatistiksel yöntemler arasında iyi bir eşleşme olduğu görülmüştür. Ayrıca grafik trend yöntemleri ile ekstrem yağışların yönelimlerinin daha detaylı bir şekilde incelenebileceği anlaşılmıştır. Bu çalışmada yağışlarda, özellikle verilerin değişkenliğinin çok olması halinde, bu yeni yöntemlerin farklı gruplardaki çeşitli trendleri daha hassas olarak belirleyebildiği anlaşılmıştır.

Thanks

Bu çalışmada beni destekleyen Doç. Dr. Reşat Mutlu'ya çok teşekkür ederim.

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Analysis of Precipitation Changes in the Central Black Sea Region with Statistical and Graphical

Year 2024, Volume: 7 Issue: 5, 2263 - 2283, 10.12.2024

Abstract

One of the most important hydrological variables is precipitation. Knowing the variability of precipitation is very important in the design, construction and operation of water structures both in agriculture. In addition, it is necessary to determine hydrological data and especially precipitation variability in drought analyses. Many statistical techniques have been developed and applied to examine possible literal changes in the time series of hydrological data. Traditional statistical methods are based on a variety of assumptions about the time series to be studied. It may be possible to reduce the assumptions in statistical methods used to assess changes in time series and to increase the reliability of the statistical approach outcomes by combining graphical and statistical methods. One way to soften assumptions in statistical methods used to analyze changes in time series and to make statistical approach results more reliable may be to use graphical and statistical methods together. In this study, annual total precipitation trend analysis of Samsun, Ordu, Çorum, Amasya, and Tokat stations located in the Central Black Sea region between 1960 and 2015 was performed using both traditional statistical method and graphical methods. To this end, two graphical methods of the refined cumulative sum of the difference between exceedance and non-exceedance counts of data points and innovative trend analyses and innovative trend analyses change boxes along with the classical statistical Mann–Kendall method are used to analyze historical precipitation changes. It has been observed that hidden trends, that can’t be exposed in the Mann-Kendall statistical method, and trends in different intervals can be determined with the refined cumulative sum of the difference and innovative trend analyses change boxes graphic methods. The results show a good match between the results of the graphical and statistical methods. In this study, it was understood that these new methods can determine various trends in different groups more accurately in precipitation, especially if the variability of the data is high. As a result of the study, it was found that there is a good match well between graphical and statistical methods. In addition, it has been understood that the orientations of extreme precipitation can be studied in more detail with graphical trend methods. In this study, it was understood that these new methods can determine various trends in different groups more accurately in precipitation, especially if the variability of the data is high.

References

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  • Citakoglu H., Minarecioglu N. Trend analysis and change point determination for hydro-meteorological and groundwater data of Kizilirmak basin. Theoretical and Applied Climatology 2021; 145(3): 1275-1292.
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  • Çıtakoğlu H., Minarecioğlu N. Trend analysis of monthly average flows of Kızılırmak basin. Journal of Anatolian Environmental and Animal Sciences 2019; 4(3).
  • Dabanli I., Şişman E., Güçlü YS., Birpınar ME., Şen Z. Climate change impacts on sea surface temperature (SST) trend around Turkey seashores. Acta Geophysica 2021; 69: 295-305.
  • Dabral PP., Hangshing L. Analysis of change point of rainfall and its trend in Doimukh (Itanagar), Arunachal Pradesh. Journal of Soil and Water Conservation 2017; 16(4): 370-379.
  • Demir V. Karadeniz bölgesi yağışlarının trend analizi. Ondokuz Mayıs Üniversitesi Fen Bilimleri Enstitüsü Yüksek Lisans Tezi, sayfa no:16-20, Samsun, Türkiye, 2018.
  • Deniz A., Toros H., Incecik S. Spatial variations of climate indices in Turkey. Int. J. Clim. 2011; 31: 394–403.
  • Esit M. Investigation of innovative trend approaches (ITA with significance test and IPTA) comparing to the classical trend method of monthly and annual hydrometeorological variables: a case study of Ankara region. Turkey. Journal of Water and Climate Change 2023; 14(1): 305-329.
  • Gul S., Ren J. Application of non-parametric innovative trend analysis of different time scale precipitation during (1951–2016) in Khyber Pakhtunkhwa, Pakistan. Acta Geophysica 2022; 70(1): 485-503.
  • Gumus V., Avsaroglu Y., Simsek O. Streamflow trends in the Tigris river basin using Mann− Kendall and innovative trend analysis methods. Journal of Earth System Science 2022; 131(1): 34.
  • Güçlü YS. Improved visualization for trend analysis by comparing with classical Mann-Kendall test and ITA. Journal of Hydrology 2020; 584: 124674.
  • Güçlü YS. Multiple Şen-innovative trend analyses and partial Mann-Kendall test. Journal of Hydrology 2018; 566: 685-704.
  • Gülersoy EA. Çorum merkez ilçede arazi kullanımının zamansal değişimi (1987-2011) ve çevresel etkileri. Coğrafi Bilimler Dergisi 2013; 11(2): 169-194.
  • Haan CT. Statistical methods in hydrology. The Iowa State University Press, Iowa, 1977.
  • Haktanir T., Citakoglu H. Trend, independence, stationarity, and homogeneity tests on maximum rainfall series of standard durations recorded in Turkey. Journal of Hydrologic Engineering 2014; 19(9): 05014009.
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There are 86 citations in total.

Details

Primary Language Turkish
Subjects Water Resources Engineering
Journal Section RESEARCH ARTICLES
Authors

Taner Mustafa Cengiz 0000-0003-1752-8875

Publication Date December 10, 2024
Submission Date November 3, 2023
Acceptance Date June 10, 2024
Published in Issue Year 2024 Volume: 7 Issue: 5

Cite

APA Cengiz, T. M. (2024). Orta Karadeniz Bölgesi Yağış Değişimlerinin İstatistiksel ve Grafiksel Yaklaşımlarla Analizi. Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 7(5), 2263-2283.
AMA Cengiz TM. Orta Karadeniz Bölgesi Yağış Değişimlerinin İstatistiksel ve Grafiksel Yaklaşımlarla Analizi. Osmaniye Korkut Ata University Journal of Natural and Applied Sciences. December 2024;7(5):2263-2283.
Chicago Cengiz, Taner Mustafa. “Orta Karadeniz Bölgesi Yağış Değişimlerinin İstatistiksel Ve Grafiksel Yaklaşımlarla Analizi”. Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi 7, no. 5 (December 2024): 2263-83.
EndNote Cengiz TM (December 1, 2024) Orta Karadeniz Bölgesi Yağış Değişimlerinin İstatistiksel ve Grafiksel Yaklaşımlarla Analizi. Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi 7 5 2263–2283.
IEEE T. M. Cengiz, “Orta Karadeniz Bölgesi Yağış Değişimlerinin İstatistiksel ve Grafiksel Yaklaşımlarla Analizi”, Osmaniye Korkut Ata University Journal of Natural and Applied Sciences, vol. 7, no. 5, pp. 2263–2283, 2024.
ISNAD Cengiz, Taner Mustafa. “Orta Karadeniz Bölgesi Yağış Değişimlerinin İstatistiksel Ve Grafiksel Yaklaşımlarla Analizi”. Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi 7/5 (December 2024), 2263-2283.
JAMA Cengiz TM. Orta Karadeniz Bölgesi Yağış Değişimlerinin İstatistiksel ve Grafiksel Yaklaşımlarla Analizi. Osmaniye Korkut Ata University Journal of Natural and Applied Sciences. 2024;7:2263–2283.
MLA Cengiz, Taner Mustafa. “Orta Karadeniz Bölgesi Yağış Değişimlerinin İstatistiksel Ve Grafiksel Yaklaşımlarla Analizi”. Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi, vol. 7, no. 5, 2024, pp. 2263-8.
Vancouver Cengiz TM. Orta Karadeniz Bölgesi Yağış Değişimlerinin İstatistiksel ve Grafiksel Yaklaşımlarla Analizi. Osmaniye Korkut Ata University Journal of Natural and Applied Sciences. 2024;7(5):2263-8.

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