Reservoir deltas and their role in pollutant distribution in valley-type dam reservoirs: Les Království Dam, Elbe River, Czech Republic

Bábek, Ondřej; Kielar, Ondřej; Lenďáková, Zuzana; Mandlíková, Kateřina; Sedláček, Jan; Tolaszová, Jitka

doi:10.1016/j.catena.2019.104251

Cited by 14 publications

(10 citation statements)

References 47 publications

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“…The current discussion on river damming versus freely flowing rivers is mostly focused on the continuity of sediment and nutrient transfers through the fluvial systems and the sustainability of fluvial landscapes and biomes [1]. An inevitable problem is reservoir filling with sediments, which considerably shortens the effective performance of the reservoir [1][2][3][4]. To limit this problem, flushing (sluicing) operations are performed [1,2,5].…”

Section: Introductionmentioning

confidence: 99%

“…Sediment deposition in reservoirs has been studied more intensively than sediment erosion or reworking. The spatial pattern of sediment deposition is difficult to predict, with huge impacts of hydrological events [4,9] and different depositional patterns at shorter and longer timescales [9]. Prograding deltas contain most the sediments transported by tributary streams [1,4,10].…”

Section: Introductionmentioning

confidence: 99%

“…The spatial pattern of sediment deposition is difficult to predict, with huge impacts of hydrological events [4,9] and different depositional patterns at shorter and longer timescales [9]. Prograding deltas contain most the sediments transported by tributary streams [1,4,10]. Under low flow conditions, the most common process is deposition in stepwise prograding deltas along with the incision of submerged channels, which results in a long-term increase in near-dam deposition [4,9,11].…”

Section: Introductionmentioning

confidence: 99%

“…Prograding deltas contain most the sediments transported by tributary streams [1,4,10]. Under low flow conditions, the most common process is deposition in stepwise prograding deltas along with the incision of submerged channels, which results in a long-term increase in near-dam deposition [4,9,11]. Erosion, including slumps in the inflow delta front, channel, and gully erosion in delta tops, and subaerial and subaquatic bank instabilities, is typically more spatially heterogeneous than deposition [1].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…The GPR profile conducted in the downstream area of the Rhône River revealed mounded faciès, typical for sandy to gravelly bottoms (Bâbek et al, 2020), covered by horizontal faciès (Figs. 1 C, 3 B and 6 A).…”

Section: Temporal Trends Of Obt Concentrations In the Lower Rhône Rivmentioning

confidence: 99%

Trajectories of technogenic tritium in the Rhône River (France)

Morereau

Lepage

Claval

et al. 2020

Journal of Environmental Radioactivity

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Tritium is a radioisotope of hydrogen with a half-life of 12.32 years and was used for its luminescent properties by the watchmaking industry from 1962 to the 2008. Tritiated luminescent salts were integrated in the paints applied on the index and dial of watches and clocks. French and Swiss watchmaking workshops used more than 28 000 TBq of tritium over this period of time and produced almost 350 million watches. Despite the end of tritiated salts use in watchmaking workshops in 1992 in France and 2008 in Switzerland, high level of organically bound tritium (OBT) are still observed in sediments of the Rhône River downstream the Lake Geneva. Contamination of the Rhône River by tritiated hot particles since 1962 up to nowadays remains poorly documented. In order to assess the long term behavior and fate of technogenic tritium in this river and its trajectories in the river system, two sediment cores were collected at the upstream (UC) and downstream (DC) part of the Rhône River in France and OBT contents were determined. For both sedimentary cores, maximum OBT contents were registered over the 1980s when tritium was intensively used by watchmaking industries. These residual OBT contents are 1.000 to 10 000 fold higher than current natural background levels in riverine sediments. The OBT contents progressively decreased since 1989 with close effective half-life in upstream and downstream area (5 ± 2 years). The OBT contents were lower in DC than in UC due to the dilution by uncontaminated sediments delivered by tributaries not affected by the watchmaking industries. Trajectories analysis indicates that the resiliency of the Rhône River system in regards to this contamination would be reached in 14-70 years and in 14-28 years respectively for the upstream and downstream part of the river.

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From the source to the reservoir and beyond - tracking sediment particles with modeling tools under climate change predictions (Carpathian Mts.)

Wilk

Szlapa

Hachaj

et al. 2021

Preprint

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Reservoir deltas and their role in pollutant distribution in valley-type dam reservoirs: Les Království Dam, Elbe River, Czech Republic

Cited by 14 publications

References 47 publications

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

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

Trajectories of technogenic tritium in the Rhône River (France)

From the source to the reservoir and beyond - tracking sediment particles with modeling tools under climate change predictions (Carpathian Mts.)

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