Glebokie Lake in Szczecin after hydrotechnical regulations

Abstract

Water quality of the Glebokie Lake in Szczecin (NW-Poland) was studied in years 2012-2014. Glebokie Lake is a reservoir with a negative water balance related to the location draining groundwater drinking water intake for Szczecin agglomeration. In 2004 hydrotechnical regulations were conducted aimed at maintaining a constant amount of water in the lake, which involved a temporary feeding Glebokie Lake with Gunica River waters. In order to determine the hydrochemical status of the Lake waters and the factors shaping water quality -19 water quality indices within 25 months were measured: temperature, pH and water oxygen status, nutrients (N, P) and ionic macrocomponents and Fetot. Trophic status of the lake waters using the Carlson criteria was defined. On the basis of chemometric analysis of measurement data (CA, PCA/FA and DA) we established that statistically significant factors affecting water quality in the study period were: seasonal (the climatic seasons) changes in the biological processes activity, periodical (in April and November) waters inflows from the Gunica River, anthropopressure in during swimming season and the coagulant (FeSO4) presence in the ecosystem. The possibility of applying the chemometric techniques to interpret measurement data in the lake type like Glebokie Lake with a small amount of data has been shown.

Water quality and ecological role of urban lake: a case study of Słoneczne Lake in Szczecin (NW-Poland)

“…The results of the research on the quality parameters of the solar lake were analyzed using selected chemometric procedures and in particular the cluster analysis (CA), Spearman coefficients were calculated between successive water quality indices and the factor analysis (FA). The CA method was used to detect and visualize the similarities and differences between the variability of individual water quality indices, examining the nature of variations for different sampling sites (station numbers) and individual sampling dates The Ward method was used to determine the distance between the clusters -equal squares of the Euclidean distance (Badillo-Camacho et al, 2015;Li et al 2015;Kari et al, 2009;Mustapha et al, 2013;Miller et al, 2016;Najar et al, 2012). The calculation of Spearman correlation coefficients was to determine the relationship between the water quality indexes so as to distinguish independent indices that characterize water quality changes during the research period.…”

“…The calculation of Spearman correlation coefficients was to determine the relationship between the water quality indexes so as to distinguish independent indices that characterize water quality changes during the research period. Factor analysis (FA) was used to determine which water quality indices could show the hidden dependencies between its own variability and significant changes in water quality (Affum et al, 2015;Kumar et al, 2014;Kumarasamy et al, 2014;Longanathan et al, 2015;Miller et al, 2016;Wang et al, 2013).…”

“…Increase in environmental pollution and constantly emerging new sources of pollution make it necessary to regularly carry out studies aimed at determining the quality of the water in the tanks and the inner-discernment -if changes occur in the quality of the way along the run-off -which biogeohydrochemical processes changes affect their quality. The Słoneczne Lake in Szczecin, located in the Gumieńce district, through which the Bukowa stream flows, is an example of such an urban reservoir (Angyual et al, 2016;Gutches et al, 2016;Hill et al, 2017;Huser et al, 2016;Miller et al, 2016;Olguin et al, 2017;Song et al, 2016).…”