Trends and evolution of contamination in a well-dated water reservoir sedimentary archive: the Brno Dam, Moravia, Czech Republic
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F13%3A00107090" target="_blank" >RIV/00216224:14310/13:00107090 - isvavai.cz</a>
Alternative codes found
RIV/61388980:_____/13:00397882 RIV/61989592:15310/13:33143885
Result on the web
<a href="https://link.springer.com/content/pdf/10.1007%2Fs12665-012-2089-x.pdf" target="_blank" >https://link.springer.com/content/pdf/10.1007%2Fs12665-012-2089-x.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s12665-012-2089-x" target="_blank" >10.1007/s12665-012-2089-x</a>
Alternative languages
Result language
angličtina
Original language name
Trends and evolution of contamination in a well-dated water reservoir sedimentary archive: the Brno Dam, Moravia, Czech Republic
Original language description
The sedimentary record from dams can provide important information about stratigraphy and pollution history of densely populated river basins. The Brno Dam is a small reservoir within the Morava River catchment (Czech Republic) accumulating lacustrine sediments since 1940 (dam filling). The stratigraphy of the dam sediments was studied using multiproxy stratigraphic analysis (X-ray densitometry, bulk magnetic susceptibility, diffuse spectral reflectance and cation-exchange capacity) of five sediment cores supported by ground-penetration radar sections. Concentrations of heavy metals were studied by X-ray fluorescence analysis. The thickness of the dam sediments decreases from 220 cm in the proximal part, near the feeder, to only 10 cm in the distal part, near the dyke. Sediments consist predominantly of finely-laminated silty sands, silts and clays. The sedimentation rate for the last similar to 22 years, inferred from Cs-137 dating, decreases from 4.2 cm per year in the proximal part of the dam to 0.29 cm per year in its distal part. Distinct long-term trends were found in the depth profiles of heavy metal concentrations. The heavy metal contents increase significantly after 1940 in all cores, with peak concentrations confined to layers deposited in the 1960s and 1980s. A decreasing trend occurred after 1989 (the decline in Czech heavy industry). The results also show that heavy metal contamination is dependent on lithology (hyperpycnal flow layers related to floods). Increased concentrations of phosphorus in the sediments indicate long-term eutrophication of the dam. Despite the recent decreasing trends in heavy metal concentrations the phosphorus contents remain high in recent years and have caused persisting problems with algal growth in the dam mentioned by previous authors.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Environmental Earth Sciences
ISSN
1866-6280
e-ISSN
1866-6299
Volume of the periodical
69
Issue of the periodical within the volume
8
Country of publishing house
US - UNITED STATES
Number of pages
13
Pages from-to
2581-2593
UT code for WoS article
000322390300010
EID of the result in the Scopus database
2-s2.0-84894988940