ArticleScientific reports2025
Long-term water quality assessment and trophic status trends in Dobromierz, Lubachów and Sosnówka drinking water reservoirs in southwestern Poland.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The aim of the article is to assess the water quality in three drinking water reservoirs in southwestern Poland, i.e. in Dobromierz, Lubachów and Sosnówka, taking into account two classification methods, to determine the trophic status and water quality indicators of 3 research objects, to analyze potential sources of anthropogenic impact on catchments in order to identify the causes of deterioration of the trophic status of reservoirs. When analyzing the results of water quality indicators for the period 1992-2022, reference was made to two classification methods: the new one, in force from 1st January 2022, and the old one, valid from 22nd October 2014 to 31st December 2021. Due to changes in the monitoring system resulting from the implementation of the assumptions of the Water Framework Directive, the scope of water quality analyses has been reduced from 23 to 9 parameters. The need to use two methods of classification of surface water bodies in the article is aimed at an in-depth analysis of water quality using an extended set of indicators. Due to limitations in data access for some indicators in individual years, the analyses conducted are of indicative nature. The overall water quality expressed by the average value of the calculated 6 water quality indices for the period 1992-2022 was moderate for the Dobromierz and Lubachów reservoirs and good for the Sosnówka reservoir. According to the new classification, the average water quality was in classes I or II. The article addresses the issue of eutrophication of water intended for consumption by determining the trophic status of the objects based on 4 trophic indices. In the years 1992-2022, the overall trophic status of the reservoirs oscillated between mesotrophic and eutrophic. The statistical analysis showed a high variability of physicochemical parameters of water. The parameters that worsened the ecological status of water in the reservoirs were NO
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