Sediment Transport and Water Flow Resistance in Alluvial River Channels: Modified Model of Transport of Non-Uniform Grain-Size Sediments

Gladkov, Gennady; Habel, Michał; Babiński, Zygmunt; Belyakov, Pakhom

doi:10.3390/w13152038

Cited by 9 publications

(4 citation statements)

References 20 publications

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“…During the pre‐ and post‐flood periods, the ambient temperature was 22–30°C and the discharge rate ranged between 98 and 2,000 m 3 /s. Based on the discharge rates, the flow velocities were estimated at 0.04–0.8 m/s, and the riverbed shear stresses were estimated at 0.009–0.36 N/m 2 using the Manning‐Strickler equation for the sand‐clay mixed riverbed (Gladkov et al., 2021; Soulsby, 1997). The warm water temperature provided a favorable environment for algal growth.…”

Section: Methodsmentioning

confidence: 99%

Dynamics of Suspended Particulate Matter in an Impounded River Under Dry and Wet Weather Conditions

Huynh

Kim

et al. 2023

Water Resources Research

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The dynamics of suspended particulate matter (SPM) and SPM‐associated biological and physicochemical processes in a river vary under dry and wet weather conditions and hydraulic structures, which moves a free‐flowing river to a semi‐lacustrine environment. This study investigated the response of SPM dynamics and riverbed morphodynamics to climate and anthropogenic stressors based on in‐situ observations and biogeochemical analyses of river water and riverbed sediment. The biochemical analyses and flocculation tests demonstrate abundant biopolymers and high flocculation potential of the river water during the pre‐flood period with algal bloom. This might promote SPM deposition and high‐concentration sediment layer (HCSL) formation on the riverbed. The high fractions of clay minerals and organic carbon in the riverbed sediment indicate the deposition of organic‐rich biomineral flocs. Vertical turbidity profiles with “long tails” of high turbidity near the riverbed also confirmed SPM deposition and HCSL formation. However, the highly turbulent flow conditions during the post‐flood period disturbed the tails of high turbidity and homogenized the vertical profiles of turbidity, temperature, and dissolved oxygen. Additionally, terrestrial humic substances were discharged from the watershed during this period, increasing the deflocculation and stabilization of SPM but decreasing deposition on the riverbed, thereby reducing the fractions of clay minerals and organic carbon in the sediment. This study demonstrated the interaction mechanism of SPM dynamics and riverbed morphodynamics with hydrological and biogeochemical processes in an impounded river under dry and wet weather conditions. The findings provide insights into water resource management to deal with climate change and anthropogenic stressors.

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Section: Methodsmentioning

confidence: 99%

Dynamics of Suspended Particulate Matter in an Impounded River Under Dry and Wet Weather Conditions

Huynh

Kim

et al. 2023

Water Resources Research

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“…On this basis, as a result of the hydraulic calculations performed in the work, an assessment of the impact of the projected quarry on the flow kinematics and channel deformations in the immediate vicinity of its location is given. The analysis of a field of speeds of a current in a zone of influence of the quarry has allowed to receive an estimation of its influence on navigable conditions and deformations of the right coast [4,5,6].…”

Section: Methodsmentioning

confidence: 99%

Modeling and analysis of changes in the channel regime of the Kama river within the boundaries of 1639,0-1644,5 km during the development of the channel part of the Sidorovskoye occurrence

2022

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The problem studied in the framework of this work is devoted to issues related to the projected excavation of soil from the channel part of the Sidorovskoye sand and gravel deposit on the river. Kama. The channel part of the deposit is located at 1639.0-1644.5 km of the Nizhnekamsk sluice–mouth of the river. Vyatka, which is the upper part of the Kuibyshev reservoir. The paper presents the results of the analysis of channel reformations of the studied section of the river according to field data and hydraulic calculations performed to model the channel process in the section of the river. Kama, is located in the downstream of the N. Kamskaya HPP, taking into account the planned engineering measures related to the extraction of river alluvium from the channel open pit.

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“…Simulations of the hydrodynamic and dynamic changes in the relief of the riverbed were carried out, and the models for accurate calculation of changes in the layer level and the area of deposition and erosion were proposed [44][45][46][47]. In the work [48][49][50], a hydraulic experiment was conducted to study the hydraulic phenomena of the dam, comparing hydraulic surges and flow characteristics.…”

Section: Introductionmentioning

confidence: 99%

Deformable River Beds: A Numerical Study

Bazarov,

Mirzaev,

Norkulov

et al. 2023

Preprint

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A mathematical model that comprehensively captures the real behavior of riverbed deformation, encompassing all pertinent effects, is developed. The underwater slope reformation process, with the generatrix aligned along the flow velocity in the model, is considered. A numerical model is introduced to calculate the flow involving a deformable bottom, and the model's validation is established through rigorous analysis of experimental findings. The research firmly confirms the suitability of the proposed mathematical and numerical model for describing deformations in uneven and unsteady river flows, including the movement of dredging slots and channel quarries. The model's minimal equation count and reliance on empirical constants demonstrate the model's efficiency. The model's predictions align strongly with experimental data, although optimal values of empirical coefficients vary slightly across different experiments. Hence, there is a call for further investigation to derive more universally applicable closure relationships for the model. The importance of validating the model with reliable field data and its potential extension to accommodate hydraulically diverse soils is emphasized. Such an extension is feasible due to the concentration transfer equation, enabling independent calculations for particle fractions of varying sizes as long as the total particle concentration in the stream remains within reasonable limits. This dedicated research contributes significantly to understanding riverbed deformations and advancing accurate modeling and management of riverine environments.

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Sediment Transport and Water Flow Resistance in Alluvial River Channels: Modified Model of Transport of Non-Uniform Grain-Size Sediments

Cited by 9 publications

References 20 publications

Dynamics of Suspended Particulate Matter in an Impounded River Under Dry and Wet Weather Conditions

Dynamics of Suspended Particulate Matter in an Impounded River Under Dry and Wet Weather Conditions

Modeling and analysis of changes in the channel regime of the Kama river within the boundaries of 1639,0-1644,5 km during the development of the channel part of the Sidorovskoye occurrence

Deformable River Beds: A Numerical Study

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