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The use of a geochemical method in the detection of groundwater discharge to floodplain lakes

100%

Glinska-Lewczuk K., Burandt P., Banaszek Z., Chormanski J., Slapinska M., Timofte C., Serwotka L., Sawczyn J., Jarzab N.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

2013

tom 17

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.

Benthic invertebrates in floodplain lakes of a Polish river: Structure and biodiversity analyses in relation to hydrological conditions

81%

Obolewski K., Glinska-Lewczuk K., Jarzab N., Burandt P., Kobus S., Kujawa R., Okruszko T., Grabowska M., Lew S., Gozdziejewska A., Skrzypczak A.

Polish Journal of Environmental Studies

2014

tom 23

nr 5

Our study was carried out in the middle basin of the Biebrza River (NE Poland) in the periods of June and September in 2011 and 2012. From among numerous side-arms, four objects have been selected for analyses of macrozoobenthos structure and biomass. Two lakes exhibited a lentic character due to a long-lasting isolation from the river channel, one presented a lotic, and one was of a semi-lotic character. Differentiated hydrological conditions within the study period enabled comparative studies: in 2011 appeared low and high water levels, while in 2012 no low water appeared and high water levels prevailed, which influenced the wetland conditions and inhabiting aquatic zoocenoses. During the study 352 individuals of benthic invertebrates with a total biomass of 288 g of wet weight were collected. Among the studied lakes we found the highest values of biodiversity indices in a lotic reservoir, while the highest densities and biomasses were in a semi-lotic reservoir. Nevertheless, the composition and abundance of benthic invertebrates in the studied lakes differed significantly from type-specific communities found in the floodplain lakes in other regions. A substantially lower level of macrozoobenthos diversity in floodplain lakes of the Biebrza River is indicative of less favorable conditions for macrozoobenthos development due to frequent water level fluctuations.

Ograniczanie wyników

1 Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

1 Polish Journal of Environmental Studies

2 Burandt P.

2 Glinska-Lewczuk K.

2 Jarzab N.

1 Banaszek Z.

1 Chormanski J.

1 Gozdziejewska A.

1 Grabowska M.

1 Kobus S.

1 Kujawa R.

1 Lew S.

1 Obolewski K.

1 Okruszko T.

1 Sawczyn J.

1 Serwotka L.

1 Skrzypczak A.

1 Slapinska M.

1 Timofte C.

1 2014

1 2013

Wyniki wyszukiwania

The use of a geochemical method in the detection of groundwater discharge to floodplain lakes

Benthic invertebrates in floodplain lakes of a Polish river: Structure and biodiversity analyses in relation to hydrological conditions