Detecting seasonal cycle shift on streamflow over Turkey by using multivariate statistical methods

Date

2018-08-01

Author

YILDIZ, DOĞAN
Gunes, Mehmet Samil
Gökalp Yavuz, Fulya
Yildiz, Dursun

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Climate change analysis includes the study of several types of variables such as temperature, precipitation, carbon emission, and streamflow. In this study, we focus on basin hydrology and, in particular, on streamflow values. They are geographic and climatologic indicators utilized in the study of basins. We analyze these values to better understand monthly and seasonal change over a 40-year period for all basins in Turkey. Our study differs from others by applying multivariate analysis into the streamflow data implementations rather than on trend, frequency, and/or distribution-based analysis. The characteristics of basins and climate change effects are visualized and examined with monthly data by using cluster analysis, multidimensional scaling, and gCLUTO (graphical Clustering Toolkit). As a result, we classify months as lowflow and high-flow periods. Multidimensional scaling proves that there is a clockwise movement of months from one decade to the next, which is the indicator of seasonal shift. Finally, the gCLUTO tool is utilized in a novel way in the hydrology field by revealing the seasonal change and visualizing the current changing structure of streamflow.

Subject Keywords

Unknown distance function, Climate-change, Trends, Proximities, Drought

URI

https://hdl.handle.net/11511/45114

Journal

THEORETICAL AND APPLIED CLIMATOLOGY

DOI

https://doi.org/10.1007/s00704-017-2242-2

Collections

Department of Statistics, Article

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Citation Formats

D. YILDIZ, M. S. Gunes, F. Gökalp Yavuz, and D. Yildiz, “Detecting seasonal cycle shift on streamflow over Turkey by using multivariate statistical methods,” THEORETICAL AND APPLIED CLIMATOLOGY, pp. 1143–1161, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/45114.