Variations in bar material grain-size and hydraulic conditions of managed and re-naturalized reaches of the gravel-bed Bečva River (Czech Republic)

Škarpich, Václav; Galia, Tomáš; Ruman, Stanislav; Máčka, Zdeněk

doi:10.1016/j.scitotenv.2018.08.329

Cited by 12 publications

(2 citation statements)

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“…Originally, it was a wandering gravel-bed river with the typical characteristics of an active channel with a hundred-metre width and an intensive bedload transport (Odra River Board State Enterprise, 2016). Such river patterns and processes were typical for neighbouring basins up to the first half of the 20th century before extensive regulation works were conducted (Škarpich, Galia, & Hradecký, 2016;Škarpich, Galia, Ruman, & Máčka, 2019). Currently, the river reach in Příbor has a degraded hydromorphological state, and two main types of pressure were identified by field evaluation.…”

Section: Study River Reach and River Assessmentmentioning

confidence: 96%

Photo simulation of a river restoration: Relationships between public perception and ecosystem services

Poledniková

Galia

2020

River Research & Apps

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Evaluating the ecosystem services (ES) of rivers is a challenging process. We chose to evaluate photo simulations of a river restoration effort using two different approaches. The first approach was an expert evaluation based on the assessment of individual river restoration elements. The second was an evaluation of public perception, which was implemented by collecting 150 respondent replies through an internet questionnaire. Participants in both methods worked with the photo of the original site and three adjusted photos (i.e., with added river restoration elements or recreational amenities). The original photo was taken in Příbor, Czechia, displayed a heavily channelized gravel‐bed river in an urban area. For this reason, the design of the river restoration effort was spatially limited. In the expert evaluation, we obtained an ascending trend; the highest score was achieved by photo simulation which had the highest number of added restoration elements. In the public perception trial, the respondents evaluated the photo simulations based on four ES categories: (a) ecological and hydromorphological function, (b) aesthetics and landscape function, (c) flood protection and (d) recreational function. It was found that the respondents differed original state from the final restoration state in the category (a), (b) and (c). The final state achieved a better score in these categories. The main findings from both approaches were that even a small restoration effort could significantly improve the perception of ES as well as their services itself provided by the restored river. This conclusion could encourage the planning and construction of river restoration projects in even densely inhabited urban areas.

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Section: Study River Reach and River Assessmentmentioning

confidence: 96%

Photo simulation of a river restoration: Relationships between public perception and ecosystem services

Poledniková

Galia

2020

River Research & Apps

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“…They are shaped through the deposition and reworking of loose sedimentary material transported by the water flow to locations where there is a local decrease in transport capacity. This process is typically associated with the channel geometry, with deposits most often found on the inner banks of bends, in areas of local channel widening, or in zones with flow obstacles that allow for the dispersion of the flow energy (e.g., downstream transversal structures like check dams and weirs or behind stable large wood) (Abbe and Montgomery 1996;Hey et al 1982;Jaballah et al 2015;Škarpich et al 2019). These bars are typically described as "forced" due to their formation process, in contrast to "periodic bars", which are large sediment deposits formed as a result of morphodynamic instability (Duró et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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

Galia,

Škarpich,

Holušová

et al. 2024

Auc Geographica

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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.

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2020

Rivers in the Landscape

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Variations in bar material grain-size and hydraulic conditions of managed and re-naturalized reaches of the gravel-bed Bečva River (Czech Republic)

Cited by 12 publications

References 76 publications

Photo simulation of a river restoration: Relationships between public perception and ecosystem services

Photo simulation of a river restoration: Relationships between public perception and ecosystem services

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

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