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Water 2017, 9(1), 22; doi:10.3390/w9010022

Altered Precipitation and Flow Patterns in the Dunajec River Basin

Institute of Engineering and Water Management, Department of Environmental Engineering, Cracow University of Technology, 31-155 Cracow, Poland
Academic Editor: Athanasios Loukas
Received: 19 November 2016 / Revised: 21 December 2016 / Accepted: 28 December 2016 / Published: 3 January 2017
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Abstract

This study analyzes changes in long-term patterns of precipitation and river flow, as well as changes in their variability over the most recent 60 years (1956–2015). The study area is situated in the mountain basin of the Dunajec River, encompassing streams draining the Tatra Mountains in southern Poland. The focus of the study was to evaluate how regional warming translates into precipitation changes in the studied mountain region, and how changes in climate affect sub-regional hydrology. Monthly time series of precipitation measured at several sites were compared for two 30-year periods (1986–2015 versus 1956–1985). The significance of the difference between the periods in question was evaluated by means of the Wilcoxon signed rank test with the Bonferroni correction. The identified shifts in precipitation for 6 months are statistically significant and largely consistent with the revealed changes in river flow patterns. Moreover, significant differences in precipitation variability were noted in the study area, resulting in a significant decrease in the repeatability of precipitation over the most recent 30 years (1986–2015). Changes in the variability of the river flow studied were less visible in this particular mountain region (while significant for two months); however, the overall repeatability of river flow decreased significantly at the same rate as for precipitation. View Full-Text
Keywords: Dunajec River Basin; orographic precipitation; river flow pattern; hydro-climatic variability; climate change; Tatra Mountains Dunajec River Basin; orographic precipitation; river flow pattern; hydro-climatic variability; climate change; Tatra Mountains
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Kędra, M. Altered Precipitation and Flow Patterns in the Dunajec River Basin. Water 2017, 9, 22.

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