AUC GEOGRAPHICA

AUC GEOGRAPHICA

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AUC Geographica (Acta Universitatis Carolinae Geographica) is a scholarly academic journal continuously published since 1966 that publishes research in the broadly defined field of geography: physical geography, geo-ecology, regional, social, political and economic geography, regional development, cartography, geoinformatics, demography and geo-demography.

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Impact factor (JCR®): 0.6
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AUC GEOGRAPHICA, 1–12

Short-term geomorphic adjustments of bars in the Elbe, a large regulated river in Czechia

Tomáš Galia, Václav Škarpich, Adriana Holušová, Jan Hradecký

DOI: https://doi.org/10.14712/23361980.2024.7
published online: 10. 06. 2024

abstract

Gravel and sandy bars constitute critical components of river channel morphology, yet their morphodynamics in large, heavily regulated rivers during periods without significant flows remain poorly understood. This study investigates changes in surface heterogeneity and sediment sizes through a two-year field monitoring program, focusing on the frontal, central, and distal sections of four bars along the Elbe River in Czechia. Despite the absence of high-flow events reaching at least a one-year recurrence interval, observable changes in surface heterogeneity and sediment sizes were noted across all bars. However, the changes did not follow a uniform pattern; individual bars and their sections exhibited varying degrees of surface sediment coarsening or fining, alongside increases or decreases in surface heterogeneity. These findings highlight the necessity for site-specific management strategies for individual bars within such human-impacted rivers, recognizing their value as ecological hotspots. Furthermore, the methodology presented in this study may serve as a blueprint for the cost-effective monitoring of bar dynamics in channelized river sections.

keywords: regulated river; bar; river morphodynamics; the Elbe

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Short-term geomorphic adjustments of bars in the Elbe, a large regulated river in Czechia is licensed under a Creative Commons Attribution 4.0 International License.

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ISSN: 0300-5402
E-ISSN: 2336-1980

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