The Nysa Łużycka River is a relatively poor river in terms of water re-sources which results in strong anthropoperssion. A characteristic phenomenon is a continuous discharge changeability in the river longitudinal profile. Brown coal mining and accompanying them investments, Polish and German mines as well as power plants have a major influence on The Nysa Łużycka river basin. Post-mining working closed in 1997 after German Bezdorf Mine is under rehabilitation by flooding waters of the Nysa Łużycka River and its left tributary, namely The Pliessnitz. The calculation of water resources balance allows to establish such conditions of water intake which represent a compromise between the need to flood the working and the effects of water abstraction on the environment and users located below. It is necessary not only to ensure an ecologically reasonable inviolable discharge but also maintain the minimal discharges guaranteed for 19 Polish and German water power plants. Working resulting from the flooding of the Berzdorf Lake is the main user of surface water in the Nysa Łużycka river basin. The reservoir is situated between the cities of Tauchritz and Klein Neudorf, west of the left bank of the river, about 10 kilometers above Zgorzelec watergauge. The installation ...
To determine the influence of suspension brought to the Nysa Łużycka River , an experiment was carried out involving a controlled discharge of mine waters to the Miedzianka River with the maintenance of the total concentration of suspension not exceeding the threshold value of 30 mg/l. The study concerned the qualitative and quantitative changeability of introduced load of suspension in the river section of approximately 110 km along 15 profiles of The Nysa Łużycka River. The study included the Nysa Łużycka sector from Sienawka to Łęknica. Developed no-mograms of discharge time worked out for data from the multiyear 1991-2008 comprised the basis for establishing the discharge time of the analysed sector of the Nysa Łużycka River which in turn determines the sampling of the river waters. The studies were conducted in the zones of low and high stream discharges. It was found that water discharged from mine to the Nysa Łużycka River after its treatment in highly efficient sewage treatment plants includes suspension of low sedimentation whose quantitative volume changes in the receiver are conditioned only by the process of dilution. The concentration of suspension which is maintained by the Nysa Łużycka River at low and mean discharges, above and ...
