Podrobnosti záznamu

    Flood deposits in a modern oxbow lake (Czech Republic): Sedimentary archive of 25-year old river contamination
    Bábek, Ondřej
    Dobrovolný, Petr
    Faměra, Martin
    Hilscherová, Klára
    Kalvoda, Jiří
    Sedláček, Jan
Typ dokumentu
    článek ve sborníku
Zdrojový dokument - monografie
    27th Meeting of IAS 2009, Alghero Italy, Book of Abstracts
    Akce: 2009/09/20 ; Algero, Sardinia
Výraz tezauru
    flood deposits
    heavy metals
    high-resolution stratigraphy
    sediment accumulation rates
Klíčové slovo
Abstrakt (anglicky)
   Toxic compounds transported by rivers are usually bound to fine-grained solid particles, which are deposited as contaminated fluvial sediments. Much of this contamination is likely to be redistributed, constituting potential serious environmental hazards. Relatively complete sediment archives of river contamination can be found in floodplains and oxbow lakes. We analysed a high-resolution (month- to seasonal scale) stratigraphic record of heavy metal contamination in deposits of an artificial oxbow lake, a former meander of River Morava, a left hand tributary to River Danube. Since 1930s, the lake has been connected to the river channel via a water gate allowing contaminated fine-grained sediments to enter and settle in the lake. The accumulated sediment forms a distinct wedge, about 150 m long, 30 m wide and >2.5 m thick in the proximal part. 137Cs dating revealed a distinct (~300 Bq.kg-1) Chernobyl anomaly at ~130 cm depth, implying relatively high sedimentation rates of ~5.9 cm p
   er year.
    MU Brno, Přírodovědecká fakulta
Kód přispěvatele
    MU, PřF
Zdrojový formát
Datum importu
    8. 8. 2012