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Palaeoenvironmental changes and anthropogenic impact recorded in floodplain sediments: A case study from the lower Morava River Basin (Czech Republic)
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SYSNO ASEP 0557117 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Palaeoenvironmental changes and anthropogenic impact recorded in floodplain sediments: A case study from the lower Morava River Basin (Czech Republic) Author(s) Kadlec, Jaroslav (GFU-E) ORCID, RID
Světlík, Ivo (UJF-V) RID, ORCID, SAI
Rybníček, Michal (UEK-B) RID, ORCID, SAI
Kolář, Tomáš (UEK-B) RID, ORCID, SAI
Stehlík, F. (CZ)
Petrovský, Eduard (GFU-E) ORCID, RID
Grison, Hana (GFU-E) RID, ORCID, SAIArticle number 111000 Source Title Palaeogeography, Palaeoclimatology, Palaeoecology. - : Elsevier - ISSN 0031-0182
Roč. 597, July (2022)Number of pages 15 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords Strážnické Pomoraví ; flood frequency ; soil erosion ; human activities ; magnetic minerals ; radiocarbon dating ; dendrochronology OECD category Geology R&D Projects EF16_019/0000728 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LTV19011 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LTC19029 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2018123 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) IAAX00130801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) Method of publishing Open access Institutional support GFU-E - RVO:67985530 ; UJF-V - RVO:61389005 ; UEK-B - RVO:86652079 UT WOS 000893571700001 EID SCOPUS 85129057444 DOI 10.1016/j.palaeo.2022.111000 Annotation The Morava River catchment in the Czech Republic serves as sedimentary archive reflecting various natural and man-made processes, and was studied by several authors from the point of view of flood frequency, anthropogenic contamination, or alluvial history. However, more consistent and detailed information on the effect of human activities, namely in terms of land use and river regulation, is missing. The aim of this study is to reconstruct the palaeoenvironmental and anthropogenic processes affecting the floodplain sediments in this area, focusing on the last few hundreds of years. Alluvial sediments from river banks and drilled cores were collected in the Strážnické Pomoraví area from sites both inside and outside dams constructed to avoid flooding. Magnetic parameters, reflecting the composition and grain-size distribution of iron oxides, which serve as fingerprints of lithogenic vs. pedogenic vs. anthropogenic origin, are complemented by the radiocarbon and dendrochronological dating. In addition, deposition age was estimated using the 137Cs activity and persistent organic pollutant content. Our results reveal continuous increase of ferrimagnetic minerals (magnetite) input to the floodplain, suggesting increased soil erosion in the catchment. Significantly different pattern was observed inside and outside the flood dykes. The erosion accelerated since the 1950s due to incorrect land use and introduction of modern agriculture techniques. Finally, the industrial pollution significantly contributes to the magnetic enhancement of the topmost 50 cm of the floodplain sequences. Although the results represent local case study, they have more general validity in the sense that records of paleoenvironmental changes and human activities in floodplain sediments may not be well preserved in all the strata, and also their spatial distribution of individual markers may show significant variability. Workplace Geophysical Institute Contact Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Year of Publishing 2023 Electronic address https://www.sciencedirect.com/science/article/pii/S0031018222001705
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