Disturbances in coarse bedload transport in a high-mountain stream channel system (Western Tatras, Poland)

Płaczkowska, Eliza; Krzemień, Kazimierz; Gorczyca, Elżbieta; Bojarczuk, Anna; Żelazny, Mirosław

doi:10.1016/j.geomorph.2020.107428

Cited by 5 publications

(2 citation statements)

References 70 publications

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“…This limitation might be a challenge and an arena for future research, and thus possible unanswered questions can be addressed. Our findings also show a consistent result with the current theory of sediment transport optimization as exhibited by [8,22,36], and the results show that riverbed erosion could be prevented by protecting the bed materials from flow-generated shear stress. It is tantamount to a lined channel but with the provision of locally available and low-cost armor materials that would correct shear stress-induced damage and become material groups for the armor.…”

Section: Discussionsupporting

confidence: 89%

Armor Layer Uniformity and Thickness in Stationary Conditions with Steady Uniform Flow

2022

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The continuous movement of riverbed particles due to turbulent flow determines the stability of non-cohesive riverbeds and banks during riverbed and bank erosion and sedimentation. This study emulated the stable channel design by deriving the low maintenance cost of the channel through bed protection by an armor layer. The study investigated the effects of shear stress and grain size uniformity to determine the minimum non-cohesive armor layer thickness for the stability of riverbeds under steady uniform flow conditions. Experiments were conducted with four different discharges, five armor material gradations, and five bed-slope variations in a full-scale flume. We observed and recorded the behaviors of the five gradations of armor materials for given discharges and bed slopes. Eighty data points were recorded and analyzed. The hydraulic analysis of the flow along with the soil mechanics analysis of the armor materials was done. The soil mechanic analysis was particularly focused on the uniformity coefficient of the armor layer, Cu, to derive the armor layer equation. However, for the manageability of the study, we set the limit of the Cu between 3.0 and 6.0. From the viewpoint of non-erodibility, a wider Cu value indicated a thinner armor layer. Variables that govern the armor layer thickness and the layer thickness itself were derived and proposed. The variables, namely Cu, shear stress (t0 and tc), and mean diameter of the bed load and armor materials (Db50 and Da50). Our results show that these variables governed the thickness of the armor layer, and this is expected to contribute to the design of stable natural channels, which can minimize the cost of irrigation canal maintenance and development. Doi: 10.28991/CEJ-2022-08-06-01 Full Text: PDF

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Section: Discussionsupporting

confidence: 89%

Armor Layer Uniformity and Thickness in Stationary Conditions with Steady Uniform Flow

2022

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“…As a result, numerous techniques have been developed for identifying bedload sediment transport, including tracers [13][14][15][16], optical methods, ultrasonic topography, and acoustic approaches. Radioactive particle tracking [17,18], radio-tracking techniques [19][20][21], magnetic tracer particles [22][23][24], painted particles [25], and the "Smartrock" tracer [26,27] are all examples of tracer techniques. This approach, however, has certain drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Development of the Gravel Pressure and Voice Synchronous Observation System and Application in Bedload Transport Measurement

Tian,

Yang,

Zhang

et al. 2023

Applied Sciences

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Bedload sediment transport is critical in the natural river environmental and ecological system. It is quite challenging to measure the bedload sediment transport rate in rivers with any degree of accuracy. In this study, the authors developed the Gravel Pressure and Voice Synchronous observation system (GPVS) to estimate the bedload sediment transport rate in rivers. The core of the GPVS includes an underwater high-fidelity audio recorder and pressure sensor. The audio recorder is intended to monitor the low bedload sediment transport rate, whereas the pressure sensor is utilized to detect relatively substantial bedload sediment transport. The GPVS is tested by running flume experiments with natural gravel to evaluate the system’s reliability and feasibility. Results reveal that the GPVS has a very high sensitivity for detecting bedload transport. When the bedload sediment transport rate is relatively low, the audio recorder can measure it quantitatively, showing that the system is not impacted by ambient noise.

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Effects of forest damage on rainfall thresholds to initiate bedload transport in mountain watersheds, Republic of Korea

Seo,

Lee,

Kim

et al. 2024

Landscape Ecol Eng

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Disturbances in coarse bedload transport in a high-mountain stream channel system (Western Tatras, Poland)

Cited by 5 publications

References 70 publications

Armor Layer Uniformity and Thickness in Stationary Conditions with Steady Uniform Flow

Armor Layer Uniformity and Thickness in Stationary Conditions with Steady Uniform Flow

Development of the Gravel Pressure and Voice Synchronous Observation System and Application in Bedload Transport Measurement

Effects of forest damage on rainfall thresholds to initiate bedload transport in mountain watersheds, Republic of Korea

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