THE USE OF A GEOCHEMICAL METHOD IN THE DETECTIONOF GROUNDWATER DISCHARGE TO FLOODPLAIN LAKES

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Katarzyna Glińska-Lewczuk Paweł Burandt Żaneta Banaszek Jarosław Chormański Małgorzata Słapińska Cristina Timofte Lech Serwotka Joanna Sawczyn Natalia Jarząb

Abstract

Water quality parameters of floodplain lakes may be indicative of the intensity of groundwater recharge. The main assumption made in the study is that the direct influence of groundwater recharge is reflected in the vertical gradient of temperature and aeration along the whole water column. Considering this, we seasonally monitored physical and chemical properties of 22 oxbow lakes in postglacial river valleys (the Słupia, Drwęca and Łyna rivers) in temperate climate zone in the southern watershed of the Baltic Sea (N Poland). The results were compared with groundwater samples from transects of piezometers located near the floodplain lakes. The floodplain water bodies showed variability (both in vertical and spatial dimensions) in temperature, aeration and electrolytic conductivity, affected mainly by different sources of water supply. The temperatures and dissolved oxygen contents declined not only with the increasing depth of water and a distance from the river channel, but also a significant drop in the parameters’ values have been associated with groundwater recharge within the floodplain edge.


Key words: oxbow lake, groundwater, hydrological connectivity, thermal gradient, aeration


 

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How to Cite
GLIŃSKA-LEWCZUK, Katarzyna et al. THE USE OF A GEOCHEMICAL METHOD IN THE DETECTIONOF GROUNDWATER DISCHARGE TO FLOODPLAIN LAKES. Baltic Coastal Zone, [S.l.], v. 17, p. 2013, vol.17, pp. 21 - 34, mar. 2014. ISSN 1643-0115. Available at: <https://bcz.apsl.edu.pl/index.php/1/article/view/69>. Date accessed: 04 july 2022.
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