Using sedimentary archives to reconstruct pollution history and sediment provenance: The Ohře River, Czech Republic

Grygar, Tomáš Matys; Elznicová, Jitka; Kiss, Tímea; Smith, Hugh G.

doi:10.1016/j.catena.2016.05.004

Cited by 48 publications

(18 citation statements)

References 50 publications

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“…bioturbation, contaminants/radionuclides migration or leeching), etc. (Lewin and Macklin, 2003;Bábek et al, 2008;Matys Grygar et al, 2016). The different dating methods will be more or less affected by those processes: the use of 137 Cs activity measurements might prove little informative if a sedimentation hiatus coincides with an activity peak or if the sediments were deposited after 1986, while a varying sedimentation rate is especially misleading when trying to infer a time period from a known contamination trend.…”

Section: Multi-proxy Dating In a Complex Fluvial Settingmentioning

confidence: 99%

“…Floodbasins have often been used as archives of historic contamination as they are less prone to reworking than channel deposits and thus constitute long-term records of fine-grained sediments that efficiently retain contaminants (Matys Grygar et al, 2016). The counterpart is that the record is most likely intermittent, sediments being deposited in high-discharge conditions only.…”

Section: Influence Of Depositional Environments On Sediment Archivesmentioning

confidence: 99%

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Depositional environments and historical contamination as a framework to reconstruct fluvial sedimentary evolution

Vauclin

Mourier

Dendievel

et al. 2021

Science of The Total Environment

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Section: Multi-proxy Dating In a Complex Fluvial Settingmentioning

confidence: 99%

Section: Influence Of Depositional Environments On Sediment Archivesmentioning

confidence: 99%

Depositional environments and historical contamination as a framework to reconstruct fluvial sedimentary evolution

Vauclin

Mourier

Dendievel

et al. 2021

Science of The Total Environment

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“…Our work focused on the sediment dynamics of inflows to the Skalka and Nechranice reservoirs in the Ohře River. The reservoirs have been impacted by severe pollution by Hg from the former Marktredwitz Chemical Factory (MCF), [6,8,41,42] and several heavy metals and As from historical ore mining in the Krušné Hory/Erzgebirge Mountains along the Czech-German border [6,8,41]. The reservoirs have efficiently trapped the historical pollution, but this efficiency could decline due to sediment reworking during drawdowns [42] and stepwise downstream transport of sediments [42].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Sediments in Reservoir Inflows: A Case Study of the Skalka and Nechranice Reservoirs, Czech Republic

Pacina

Lenďáková

Štojdl

et al. 2020

IJGI

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A wide variety of geographic information system tools and methods was used for pre-dam topography reconstruction and reservoir bottom surveying in two dam reservoirs in the Ohře River, Czech Republic. The pre-dam topography was reconstructed based on archival aerial imagery and old maps. The benefits and drawbacks of these methods were tested and explained with emphasis on the fact that not all processed archival data are suitable for pre-dam topography modeling. Bathymetric surveying of a reservoir bottom is presently routine, but in this study, we used a wide combination of bathymetric mapping methods (sonar, ground penetration radar, and sub-bottom profiler) and topographic survey tools (LiDAR and photogrammetry), bringing great benefits for bottom dynamic analysis and data cross-validation. The data that we gathered made it possible to evaluate the formation of the inflow deltas in the reservoirs studied and assess the sediment reworking during recent seasonal drawdowns. A typical inflow delta was formed in the deeper of the two studied reservoirs, while the summer 2019 drawdown caused the formation and incision of a temporary drawdown channel and erosive downstream transport of approximately 1/10 of the delta body thickness in approximately 1/10 of the delta transverse size. No inflow delta was formed in the shallower of the studied reservoirs, but unexpectedly extensive sediment reworking was observed in the inflow part of the reservoir. Both the studied reservoirs and the pre-dam river floodplain have accumulated historical contamination by risk elements such as As, Hg, Pb; thus, the enhanced erosion of existing sediment bodies expected in the future, owing to more frequent droughts and global climate change, will endanger the ecological quality of the water and solids outflowing from the reservoirs.

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“…Their microtopography acts on several processes, e.g., hydrodynamic, flow direction, and sediment transportation, land uses, and land cover; therefore, they play a crucial role in flood control [5]. During floods, it is not only water and sediments which are conveyed by rivers to floodplains, but also heavy metals [6,7], which get into the water due to natural processes (e.g., weathering) or human activities (e.g., mining) [8][9][10], either in soluble form, or with suspended matter [11]. Heavy metals can be dangerous for living organisms: if these metals are taken up by crops or grass in pastures, they can get into food chains and can pose a serious health threat through bioaccumulation and biomagnification [12,13].…”

Section: Introductionmentioning

confidence: 99%

Geomorphology as a Driver of Heavy Metal Accumulation Patterns in a Floodplain

Szabó

Buró

Szabó

et al. 2020

Water

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The spatial complexity of floodplains is a function of several processes: hydrodynamics, flow direction, sediment transportation, and land use. Sediments can bind toxic elements, and as there are several pollution sources, the risk of heavy metal accumulation on the floodplains is high. We aimed to determine whether fluvial forms have a role in metal accumulations. Topsoil samples were taken from point bars and swales in the floodplain of the Tisza River, North-East Hungary. Soil properties and metal concentrations were determined, and correlation and hypothesis testing were applied. The results showed that fluvial forms are important drivers of horizontal metal patterns: there were significant differences (p < 0.05) between point bars and swales regarding Fe, K, Mg, Mn, Cr, Cu, Ni, Pb, and Zn. Vertical distribution also differed significantly by fluvial forms: swales had higher metal concentrations in all layers. General Linear Models had different results for macro and micro elements: macro element concentrations were determined by the organic matter, while for micro elements the clay content and the forms were significant explanatory variables. These findings are important for land managers and farmers because heavy metal concentration has a direct impact on living organisms, and the risk of bioaccumulation can be high on floodplains.

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Using sedimentary archives to reconstruct pollution history and sediment provenance: The Ohře River, Czech Republic

Cited by 48 publications

References 50 publications

Depositional environments and historical contamination as a framework to reconstruct fluvial sedimentary evolution

Depositional environments and historical contamination as a framework to reconstruct fluvial sedimentary evolution

Dynamics of Sediments in Reservoir Inflows: A Case Study of the Skalka and Nechranice Reservoirs, Czech Republic

Geomorphology as a Driver of Heavy Metal Accumulation Patterns in a Floodplain

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