Stability of the water levels regime on the lakes in Poland
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Date
2016
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Wydawnictwo Poznańskiego Towarzystwa Przyjaciół Nauk
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Abstract
The paper presents the results of a study into the stability of water-level regimes in Polish lakes.
Stability is defined as a degree of regularity with which a certain phase of the hydrological regime occurs (high
and low water levels). The hydrological regime is described with the use of the following 6 variables – first,
second and third maximum; first, second and third minimum. Stability of the hydrological regime is determined
by the stability coefficient (WS). The analysis relies on data concerning average monthly values of water
levels for 34 lakes located in Polish lake regions. There are characteristic spatial differences in the stability of
maximum and minimum water levels which are usually caused by environmental factors and human activity.
It was observed that the most stable dates were those of the 1st maximum and the 1st minimum. In the case of
the lakes in the Pomeranian, Wielkopolsko-Kujawskie and Mazurian lake districts, the occurrence date of the
1st maximum is highly stable and stable, while the date of the 1st minimum is the most stable in the lakes of
the Drawsko, Wielkopolsko-Kujawskie and Mazurian lake districts.
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Keywords
water-level regime, stability coefficient, lakes
Citation
Badania Fizjograficzne, Seria A, Tom 67, 2016, s. 305-315