Sediment accumulation rates and high-resolution stratigraphy of recent fluvial suspension deposits in various fluvial settings, Morava River catchment area, Czech Republic

Sedláček, Jan; Bábek, Ondřej; Kielar, Ondřej

doi:10.1016/j.geomorph.2015.11.011

Cited by 29 publications

(16 citation statements)

References 62 publications

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“…Similar findings were reported by Klaver et al [14], who showed that the concentration of heavy metals increases along the reservoir. Sedláček et al [13] indicated that reservoir sediments are usually more fine-grained and lithologically uniform. The variability of the sedimentation process is an individual feature of each reservoir that depends on morphometric parameters of the reservoir, water exchange time, and operating conditions.…”

Section: Discussionmentioning

confidence: 99%

“…The spatial and seasonal variations of heavy metal loads are controlled by suspended sediment concentrations as well as water pH, which controls the absorbance of heavy metals [11].The spatial distribution of sediments in a reservoir is not uniform [12]. Toward the dam, sediments are usually more fine-grained and lithologically uniform [13]. The heavy metals concentrations generally increased with the decrease of particle size and increase of organic matter.…”

mentioning

confidence: 99%

“…The spatial distribution of sediments in a reservoir is not uniform [12]. Toward the dam, sediments are usually more fine-grained and lithologically uniform [13]. The heavy metals concentrations generally increased with the decrease of particle size and increase of organic matter.…”

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confidence: 99%

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Heavy Metal Transport in a River-Reservoir System: a Case Study from Central Poland

Sojka¹,

Siepak²,

Jaskuła³

et al. 2018

Pol. J. Environ. Stud.

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The development of dams alters the structure and function of river ecosystems. Dam reservoirs have an impact on flow regime, sediment transport, and water quality. Damming a river decreases water velocity, which leads to an increase in suspended sediments deposition. Reservoirs often are described as water treatment plants because they trap water contaminants and suspended sediments. Suspended sediments are the principal factor for heavy metals transport [1][2]. Human activity increased input of heavy metals to water bodies where sediments are deposited [3][4][5][6][7][8]. Amin et al. [9] and Zheng et. al. [10] reported that more than 90% of the heavy metal load in the water bodies has been associated with suspended particulate matter and sediments. The spatial and seasonal variations of heavy metal loads are controlled by suspended sediment concentrations as well as water pH, which controls the absorbance of heavy metals [11].The spatial distribution of sediments in a reservoir is not uniform [12]. Toward the dam, sediments are usually more fine-grained and lithologically uniform [13]. The heavy metals concentrations generally increased with the decrease of particle size and increase of organic matter. The concentration of heavy metals in Pol. AbstractThe aim of this study was to analyze the heavy metals transport in a river-reservoir system. Sediment samples from 25 locations (9 from the Powa River and 16 from the Stare Miasto Reservoir) were analyzed for trace metals contents (Cr, Ni, Cu, Zn, Cd, and Pb). The relationships between heavy metal concentrations and bottom sediment physical properties were determined with the use of the multivariate statistical techniques cluster analysis (CA), principal component analysis (PCA), and canonical correspondence analysis (CCA). The results showed that concentrations of heavy metals in the sediments of the reservoir were higher than those in the bottom sediments of the river. Concentrations of heavy metals in bottom sediments in the river above the reservoir were characterized by lower spatial variability. Decisive influence on heavy metal concentrations of bottom sediments had silt, clay, and total organic matter content.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Heavy Metal Transport in a River-Reservoir System: a Case Study from Central Poland

Sojka¹,

Siepak²,

Jaskuła³

et al. 2018

Pol. J. Environ. Stud.

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“…THE CZECH REPUBLIC The findings from the above sections are briefly illustrated using a geological data set from lacustrine sediments of the Nové Mlýny reservoir in the Czech Republic (underwater core NM1, WGS-84: 48 • 53 8.771 N, 16 • 31 52.966 E) [26].…”

Section: Illustrative Example: Reservoir Sediments Inmentioning

confidence: 99%

Practical Aspects of Log-ratio Coordinate Representations in Regression with Compositional Response

Fišerová

Donevska

Hron

et al. 2016

Measurement Science Review

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Regression analysis with compositional response, observations carrying relative information, is an appropriate tool for statistical modelling in many scientific areas (e.g. medicine, geochemistry, geology, economics). Even though this technique has been recently intensively studied, there are still some practical aspects that deserve to be further analysed. Here we discuss the issue related to the coordinate representation of compositional data. It is shown that linear relation between particular orthonormal coordinates and centred log-ratio coordinates can be utilized to simplify the computation concerning regression parameters estimation and hypothesis testing. To enhance interpretation of regression parameters, the orthogonal coordinates and their relation with orthonormal and centred log-ratio coordinates are presented. Further we discuss the quality of prediction in different coordinate system. It is shown that the mean squared error (MSE) for orthonormal coordinates is less or equal to the MSE for log-transformed data. Finally, an illustrative real-world example from geology is presented.

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“…Variabilita sedimentačních podmínek, indikována petrofyzikálními proxy, je zde vyšší, než je obvyklé ve starších slepých ramenech. Ta jsou často situována dále od hlavního toku a převažuje v nich klidná sedimentace ze suspenze (Falkowska -Falkowski 2015;Sedláček et al 2016), zatímco studovaná lokalita je patrně spojena s hlavním tokem během vyšších průtoků a za povodňových stavů. Za středních průtoků je možná komunikace skrz deprese v aluviální zátce.…”

Section: Metodikaunclassified

Vznik a vývoj mrtvého ramene u Polanky nad Odrou v CHKO Poodří

Sedláček

Kielar²,

Šimíček³

et al. 2017

Geologické výzkumy

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Předložený článek se zabývá výzkumem sedimentů nově vzniklého mrtvého ramene, které je lokalizováno v CHKO Poodří. Cílem studie je charakterizovat iniciální stadia jeho vývoje. Pro určení základních vlastností sedimentů byly použity metody vysokorozlišující stratigrafie. Byl změřen obsah vody, magnetická susceptibilita, spektrální odraznost ve viditelném světle, zrnitostní rozbor a obsah celkového organického uhlíku (TOC). Studované mrtvé rameno, situované u Polanky nad Odrou, bylo vytvořeno po povodních v roce 2010 protržením meandrové šíje. Na lokalitě byla odebrána dvě jádra o délce 81 cm (POD2) a 108 cm (POD1). Sedimenty sestávají převážně z prachu s vysokým podílem jílové frakce. Materiál s písčitou příměsí byl nalezen v bazálních částech, což nasvědčuje ukládání během iniciálního stadia vzniku mrtvého ramene. Magnetická susceptibilita a CIEL* vykazují určitou variabilitu, která je podmíněna změnami sedimentačních podmínek během roku. Zejména může indikovat jarní povodně a vyšší organickou produkci během letních měsíců. Na druhou stranu je obsah TOC nízký, pravděpodobně v důsledku rychlé degradace organické hmoty. Mrtvé rameno je stále hydraulicky spojeno s hlavním tokem, a proto je dobře okysličené. Rychlost sedimentace je vzhledem k malému akomodačnímu prostoru velmi vysoká, až 18 cm/r. Postupující změlčování a zužování dále vede ke zmenšování vodní plochy mrtvého ramene.

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Sediment accumulation rates and high-resolution stratigraphy of recent fluvial suspension deposits in various fluvial settings, Morava River catchment area, Czech Republic

Cited by 29 publications

References 62 publications

Heavy Metal Transport in a River-Reservoir System: a Case Study from Central Poland

Heavy Metal Transport in a River-Reservoir System: a Case Study from Central Poland

Practical Aspects of Log-ratio Coordinate Representations in Regression with Compositional Response

Vznik a vývoj mrtvého ramene u Polanky nad Odrou v CHKO Poodří

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