Series of 16 fishponds was monitored as a part of a drainage basin of Hracholusky reservoir, which is subject of a recovery project. All the fishponds were eutrophic – hypertrophic due to wastewaters from villages and little cities (including overflows from sewers) and/or due to too intensive production of “hunters ducks” – the phenomenon that is rarely mentioned.
High eutrophication is the main factor that has recently disabled the Jordán water reservoir for water supply and recreational purposes. Large-scale dredging of sediments was done between years 2011 and 2014. Thereafter a complex monitoring of water quality has been initiated since 2015.
The impact of oxygen and nitrates availability on phosphorus cycle in sediments – an example of the Vranov Reservoir
The inflow parts of eutrophic reservoirs typically exhibit exacerbated rates of primary production, with concomitant increase in organic matter sedimentation. Its microbial remineralization leads to the consumption of electron acceptors.
Presently a demand of sustainable maintenance of water quantity and quality is more and more accented in context of population booming and actual climate change. A research project no. QJ1620040, supported by the Czech Agricultural Research Agency, has started in 2016 with the aim to assess the options for reduction of water pollution both from point and non-point sources with suspended solids, nitrogen and phosphorus in drinking water sources catchments.
Water quality in drinking water reservoir Švihov on Želivka river and its river basin, with focus on specific organic compounds
River basin of the largest drinking water reservoir Švihov on the Želivka River is distinctly anthropogenically affected both by direct human activities and also by the agriculture. The quality of the surface water is endangered in long-term period mainly by the eutrophication, pesticides pollution and erosion.