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1
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Spatial variability of recent sedimentation rates in the Eastern Gotland Basin (Baltic Sea)

100%
Hille S., Leipe T., Seifert T.
Oceanologia
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2006
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tom 48
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nr 2
In order to study recent sedimentation rates in the Eastern Gotland Basin, 52 short sediment cores collected from the deepest part (<150 m)of the Basin in 2003 were investigated. The upper parts of all the cores were distinctly laminated and dark in colour, followed by a homogeneous, greyish lower part. The thickness of the laminated sequences varied from 17 to 300 mm. 210Pb dating analyses of selected cores revealed that the change from non-laminated to laminated sediments happened about 100 years ago, indicating a shift from predominantly oxic bottom water conditions to anoxic conditions. Used as a time marker, this shift in the sediment texture enabled sediment accumulation rates to be estimated for all sediment cores. The observed mean linear sedimentation rate for the whole basin was 0.93 ± 0.67 mm yr−1. The respective bulk sediment accumulation rates ranged from 10.5 to 527 g m−2 yr−1 with an average of 129 ± 112 g m−2 yr−1, indicating a high spatial variability of sedimentation rates within the basin. This agrees very well with the long-term sedimentation pattern since the Litorina transgression. The observed pattern clearly reflects the hydrographic conditions at the seafloor as studied by modelled near-bottom current velocities.
2

Application of numerical model simulations for estimation of morphdynamics and vegetation impact on transport of dissolved substances in the Warta river reach

84%
Wicher-Dysarz J., Dysarz T.
Acta Scientiarum Polonorum. Formatio Circumiectus
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2014
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tom 13
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nr 4
The main problem analysed in this paper is the impact of sediment accumulation and vegetation growth on transport of dissolved substances in a river. The system studied is the reach of the Warta River located upstream of the Jeziorsko Reservoir inlet. The three processes, namely sediment deposition, vegetation growth, and pollutant transport, are crucial for the functionality of reservoir. Classical HEC-RAS package is used for the reconstruction of steady flow conditions in the river reach. The transport of admixture is simulated by means of convection – dispersion model with additional elements describing storage of solutes in the floodplains. The results that the degree of maximum concentration decreases as the river bed geometry and vegetation cover are changed.
3

Heavy metals in the Baltic surface sediments

84%
Pempkowiak J., Walkusz-Miotk J.
Bulletin of the Polish Academy of Sciences. Earth Sciences
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1994
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tom 42
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nr 1
4

Modeling of sediment accumulation in the inlet part of Jeziorsko reservoir

67%
Wicher-Dysarz J., Przedwojski B.
Roczniki Akademii Rolniczej w Poznaniu. Melioracje i Inżynieria Środowiska
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2005
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tom 26
483-493
5
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Spatio-temporal patterns of PAHs, PCBs and HCB in sediments of the Western Barents Sea

67%
Zaborska A., Carroll J., Pazdro K., Pempkowiak J.
Oceanologia
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2011
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tom 53
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nr 4
We examine the composition and levels of organic contaminants (PAHs, PCB, HCB) in four sediment cores collected from the Barents Sea. We assess the influence of temporal variations in contaminant supplies and post-depositional reworking on contaminant distribution. Anthropogenic levels of P12PAH reached 95 ng g−1, higher inventories dominated by BKF were observed at southern stations, while northern stations exhibited lower inventories with PHE as the dominant compound. The PCB composition was similar at all stations dominated by CB101, 138 and 153. P7PCB concentrations were higher at northern stations. The observed composition and spatio-temporal pattern of organic contaminants is in accordance with long-range transport supplies.
6
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Sedimentation from suspension and sediment accumulation rate in the River Vistula prodelta, Gulf of Gdansk (Baltic Sea)

67%
Damrat M., Zaborska A., Zajaczkowski M.
Oceanologia
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2013
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tom 55
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nr 4
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