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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13520%2F16%3A43887801" target="_blank" >RIV/44555601:13520/16:43887801 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388980:_____/16:00461497

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.catena.2016.05.004" target="_blank" >http://dx.doi.org/10.1016/j.catena.2016.05.004</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.catena.2016.05.004" target="_blank" >10.1016/j.catena.2016.05.004</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

The historic contamination of floodplains offers an important archive of past polluting activities and fluvial sediment dynamics. The knowledge of pollutants and their spatial distribution in floodplains is essential for mitigate future impacts of pollution. The study is situated in the Ohře River, which provides an excellent test case given its complex pollution history, heterogeneous geology and variable deposition patterns. Most severe pollution in this river system has originated from a chemical factory in Marktredwitz (mainly Hg) and uranium processing in Nejdek (mainly U); historical lead mining and modern coal combustion have also played a role. The geological/geochemical variability of the Ohře catchment required extensive sampling along the river course. Variations in several major lithogenic elements (Al, K, Rb, Si and Ti) allowed the river course to be subdivided to geochemical river reaches using simple scatter or PCA. The geochemical river reaches reflect catchment geology and hence they exhibit distinct background functions for Cu, Pb, and Zn and varying background concentrations of U. Titanium was the best performing reference element. The Ohře River has deposited most historical pollution in former channels rather than in overbank fine-grained materials. The former channel sediments can be recognised by a specific surface topography, vegetation cover and sediment lithology; the use of historical maps, aerial photographs and DTM by LIDAR is indispensable in the study of the depositional patterns. The narrow floodplain limited floodplain deposition. Dams constructed in the 1960s in the upper and middle river reaches have suppressed downstream transport of pollution and combined with certain channel engineering projects to prevent bank erosion are likely to have further limited the deposition. The study clearly shows that in the Ohře floodplain the fills of former channels are more suitable as pollution archives than the distal floodplain sediments.

Název v anglickém jazyce

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

Popis výsledku anglicky

The historic contamination of floodplains offers an important archive of past polluting activities and fluvial sediment dynamics. The knowledge of pollutants and their spatial distribution in floodplains is essential for mitigate future impacts of pollution. The study is situated in the Ohře River, which provides an excellent test case given its complex pollution history, heterogeneous geology and variable deposition patterns. Most severe pollution in this river system has originated from a chemical factory in Marktredwitz (mainly Hg) and uranium processing in Nejdek (mainly U); historical lead mining and modern coal combustion have also played a role. The geological/geochemical variability of the Ohře catchment required extensive sampling along the river course. Variations in several major lithogenic elements (Al, K, Rb, Si and Ti) allowed the river course to be subdivided to geochemical river reaches using simple scatter or PCA. The geochemical river reaches reflect catchment geology and hence they exhibit distinct background functions for Cu, Pb, and Zn and varying background concentrations of U. Titanium was the best performing reference element. The Ohře River has deposited most historical pollution in former channels rather than in overbank fine-grained materials. The former channel sediments can be recognised by a specific surface topography, vegetation cover and sediment lithology; the use of historical maps, aerial photographs and DTM by LIDAR is indispensable in the study of the depositional patterns. The narrow floodplain limited floodplain deposition. Dams constructed in the 1960s in the upper and middle river reaches have suppressed downstream transport of pollution and combined with certain channel engineering projects to prevent bank erosion are likely to have further limited the deposition. The study clearly shows that in the Ohře floodplain the fills of former channels are more suitable as pollution archives than the distal floodplain sediments.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DD - Geochemie

OECD FORD obor

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Projekt

<a href="/cs/project/GA15-00340S" target="_blank" >GA15-00340S: Antropogenní znečištění a stavba říčních niv: dva fenomény a jediný příběh</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Catena

ISSN

0341-8162

e-ISSN

—

Svazek periodika

2016

Číslo periodika v rámci svazku

144

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

21

Strana od-do

109-129

Kód UT WoS článku

000379375900012

EID výsledku v databázi Scopus

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