The scientific research of the oxbow lake of Słupia River was carried out from 1998 as a preparation for drilling the conception of renaturyzation of Słupia River. It consisted in including particular oxbow lake in the right stream. The research included the analysis of the most important ecological formations with special regard to periphyton living in artificial and biotic substratum. In 2003 Koński Staw, one of the oxbow lake in the lagoon polder of the city of Słupsk, was submitted to the process of dredged. Drainage works created new life conditions for hybrobionts. During the research period (2004–2005) the density of bottom microfauna was increasing noticeably. The density of zooperiphyton living in artificial substratum was also increasing from 132 to 303 thou. indiv. m-2. However, high fluctuation on the biotic substratum could be observed. The density of zooplankton was fluctuating between 9.3 – 15.8 thou. indiv. per dm-3. The results of the research allow to state that the drainage works carried out in the oxbows lake of Słupia River are very profitable for zoocoenoses hybrobints. The removal of bottom sediments with hydrogen sulphide accumulated in reservoirs caused the reconstruction of qualitatively- quantitative structure of macrozoobenthos, zooperiphyton and zooplankton. It allowed ...
In this study the project of technical solutions applied in the renaturation of three oxbow lakes in the Słupia river basin is presented. The aim of those treatments is to restore more natural characteristic of the river by the protection of various river basin elements. The project is focused on the reconstruction of permanent connection between the Słupia River and oxbow lakes. That would enable their irrigation, improvement of physico-chemical conditions and also would create habitats favorable for various hydrobiont groups. The plan of hydrotechnical treatments is accompanied by the model of monitoring for the sake of verification of ecological changes. Thanks to multivariate environmental research it is possible to reveal those changes and to elaborate methods of oxbow lake protection against terrestrialisation and disappearance. The final effect of the project will be the mathematical model of oxbow lake restoration consisting of many submodels of environmental conditions (hydrology, hydrochemistry) as well as plant and animal ecological formations (e.g. invertebrates, macrophytes, bacterias).
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