Badania Fizjograficzne, Seria A, Tom 66, 2015
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Browsing Badania Fizjograficzne, Seria A, Tom 66, 2015 by Author "Plewa, Katarzyna"
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Item Reżim stanów wody wybranych jezior Pojezierza Wielkopolsko-Kujawskiego(Wydawnictwo Poznańskiego Towarzystwa Przyjaciół Nauk, 2015) Plewa, Katarzyna; Wrzesiński, Dariusz; Ptak, MariuszThis article seeks to determine the regime of water stages of two lakes, Lednica and Powidzkie, located in the Wielkopolskie Lake District. In the research, use was made of their daily water-level figures from 1984–2012. In order to establish the regime features of the lakes, the method hitherto applied in river regime studies was employed: an analysis of the temporal structure and type of lake water stages and their changes in an average annual cycle. As the research has shown, Lake Lednica has a 5-period regime structure, while Lake Powidzkie has no characteristic cycle of change in its water levels, a consequence of which is the 2-period structure of its regime. Because of the similarity of the location of the lakes and the natural conditions of their operation, the causes of their different regimes should be sought in their individual features and in human activity.Item Wpływ Oscylacji Północnoatlantyckiej na przepływy rzek w dorzeczu górnej Wisły(Wydawnictwo Poznańskiego Towarzystwa Przyjaciół Nauk, 2015) Wrzesiński, Dariusz; Ogór, Tomasz; Plewa, KatarzynaThis article examines the dependence between monthly and seasonal NAO indices and monthly flows of rivers in the Wisła basin down to Jagodniki. In the analysis, use was made of monthly flow data from 55 gauging stations from 1971–2010. On the basis of 156 coefficients of correlation among the variables analysed, two variants of the clustering of the gauging stations, using Ward’s method, were employed. In both, six river clusters were distinguished. In a majority of cases, the analyses showed there to be the strongest negative correlation between winter NAO indices and May to September flows of the Wisła’s left-bank tributaries. The NAO impact on the flow of the Wisła’s Carpathian tributaries is weaker, though still observable.