Posters 2013 | GEOMORPHOLOGY- PARIS 2013 http://resumes

osters 2013 | GEOMORPHOLOGY- PARIS 2013
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1711
S09B - Karstic geomorphology: from hydrological functioning to palaeoenvironmental reconstructions
Fluctuations of water levels in karst lakes near Staszów (Niecka Nidzia ska, Poland)
ZIELI SKI A.(1), ZAGÓRSKI P.(2), SHCHERBA V.(3)
(1) Jan Kochanowski University in Kielce, Institute Geography, KIELCE, POLAND ; (2) Maria Curie-Sklodowska University, LUBLIN, POLAND ; (3) Moscow State Humanitarian
University of Sholokhov, MOSCOW, RUSSIAN FEDERATION
Near Staszów, which is situated in the north-eastern part of Niecka Nidzia ska, there are numerous small but relatively deep lakes. They are of karst origin. Their occurrence is
connected with a specific geological feature of the area. Karsting rocks are developed in the forms of gypsum and limestone, which are covered by non-karsting, water resistant Tertiary
loams and impervious fluvioglacial sediments, which are next covered by vistulian and pleistocene sands.
21 lakes were the objects of the research. Winter 2011 was the time when, by using Global Positioning System (GPS, Leica System 500). At the same time, the benchmark points were
installed on the chosen bodies. Using them, 9 measuring series were undertaken in order to define the changes of their water levels. The lakes are situated between 180,3 to 217,5
meters over the sea level. The results show that among the non-tide lakes, the most sensitive are the ones which are the highest over the sea level. The amplitude of the water level was
34 cm in the lake situated to the north of the so called four Peatland lakes and 32 cm in the Lake Szyja near Lake Jasne. The most stabilized water level, 14 cm, was observed on the
lakes situated between Lake Szyja and Lake Jasne and the one to the north-east of Lake Jasne. Among the non-tide lakes, the water level decreased the most, within the analysed time,
on the lakes: Kacze (26 cm) and Odrodzone (24 cm). Among the lakes with outflow, the water level decreased the most on Lake Torfowe I (26 cm), and the least in Lake Łajba (6 cm).
Interestingly, the flowing lakes underwent some considerable fluctuation of water level. The highest amplitude was observed in a small body lying between Lake Jasne and Ciemne. It
was 69 cm. The reason of such relatively big water level changes was the activity of beavers, which have recently inhabited the area at the lake. Their tracks were also noticed at Lake
Ciemne.
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2013-09-22 18:1