Details zur Publikation
|DOI / URL||Link|
|Titel (primär)||Open cast mines as river sediment and pollutant sinks. The example Mulde Reservoir (East Germany)|
|Titel (sekundär)||Mining meets water - conflicts and solutions : proceedings : IMWA 2016 in Leipzig, Germany, July 11-15, 2016. 2., überarbeitete und ergänzte Auflage|
|Autor||Junge, F.W.; Schultze, M.;|
|Herausgeber||Drebenstedt, C.; Paul, M.;|
|POF III (gesamt)||T31;|
|Keywords||pit lake; Mulde Reservoir; sediment deposit; sediment management; sediment quality|
|Abstract||Since 1975, the Mulde River has flown through the abandoned open-cast lignite mining pits at
Muldenstein near Bitterfeld (Germany) forming a lake named Mulde Reservoir. Ever since, the Mulde
Reservoir has built up a sediment and pollutant deposit protecting the downstream water bodies and
sediment quality in the lower Elbe stretch extending to the port of Hamburg area and the North Sea.
Therefore, the Mulde Reservoir is an example for beneficial effects of riverine flow-through of pit
Core drillings have revealed that the sediments currently deposited in the Mulde Reservoir still have to
be regarded as highly polluted as to their contents of As, Cd, Cr, Hg, Ni, Pb, Zn, according to the
classification of the Pollutant Sediment Management Concept (PSMC) of Elbe River. Arsenic and the
mentioned metals originate from former metal mining and processing in the upper part of the
catchment of the Mulde River. However, a decrease in pollutant inflow since 1990 has been
documented, correlating with the long-term changes observed in the upper course of the Mulde River.
As far as organic pollutants are concerned, the lake sediments do not show any excessive
concentrations, apart from a few exceptions.
From a geochemical and hydraulic point of view, there is presently no need to remove the
contaminated sediments from the Mulde Reservoir. Main activities in sediment management should
focus on further improving stabilization and efficiency of the Mulde Reservoir sedimentation zone and
its transregionally vital ecosystem services. Given the present retention capacity of the Mulde
Reservoir, it will continue to serve as an important sediment trap of supra-regional significance for the
downstream water courses for at least another 770 years.
|Junge, F.W., Schultze, M. (2016):
Open cast mines as river sediment and pollutant sinks. The example Mulde Reservoir (East Germany)
In: Drebenstedt, C., Paul, M. (eds.)
Mining meets water - conflicts and solutions : proceedings : IMWA 2016 in Leipzig, Germany, July 11-15, 2016. 2., überarbeitete und ergänzte Auflage
TU Bergakademie Freiberg, Freiberg, p. 159 - 166