Surface water quality monitoring in a large dam reservoir, Poland

摘要

The paper presents a research monitoring platform implemented for the Sulejow dam reservoir located in Central Poland; the goal was to assess the quality status of the reservoir's waters during the vegetation season of 2015. Article presents the results of mobile field measurements together with laboratory analyses of biogenic parameters, in order to provide a broad picture of changes in water quality during the analysed period. Changes in water quality were evaluated based on the following parameters: chlorophyll a, ammonium ions, pH, water temperature, blue-green algae concentration, conductivity and dissolved oxygen. Analysis was complemented by laboratory measurements of the chemical parameters: nitrates, phosphates, 5-d biochemical oxygen demand, chemical oxygen demand and total organic carbon. Extensive mobile experiments enabled the mapping of the distribution of contaminants in the lake (ArcGIS). Chlorophyll a exceeded allowable values during the entire vegetation season; furthermore, the high water temperatures, high concentrations of dissolved oxygen and low concentrations of biogenic compounds illustrate the advanced eutrophication of the reservoir. Present conditions prevent any recreational use of the reservoir and generates not only environmental but also economic losses.