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Tamer A Gado - One of the best experts on this subject based on the ideXlab platform.
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impact of inclined double cutoff walls under Hydraulic Structures on uplift forces seepage discharge and exit Hydraulic gradient
Ain Shams Engineering Journal, 2021Co-Authors: Asaad M Armanuos, Abdelazim M Negm, A A Javadi, John Abraham, Tamer A GadoAbstract:Abstract In Hydraulic Structures design, using cutoff walls is essential to reduce and control the resultant uplift force (U), seepage discharge (Q), and exit Hydraulic gradient (i). This research investigates the effectiveness of inclined double cutoff walls under Hydraulic Structures, considering the influence of depths, locations, and inclination angles of the upstream and downstream cutoff walls by using Finite Element Method (FEM). The results confirmed that installing a deeper cutoff wall on the downstream reduces the exit gradient even further. In the case of the cutoff walls located in the upstream and downstream ends, the exit gradient will be less than when the cutoff walls are installed at a closer distance. Increasing the inclination angle of downstream cutoff wall has a major impact on exit gradient reduction. Embedment of cutoff walls in the upstream and downstream ends with right angles and equal depths reduces the seepage discharge more than other cases.
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Impact of inclined double-cutoff walls under Hydraulic Structures on uplift forces, seepage discharge and exit Hydraulic gradient
'Elsevier BV', 2021Co-Authors: Asaad M Armanuos, A A Javadi, Am Negm, Abraham J, Tamer A GadoAbstract:This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record In Hydraulic Structures design, using cutoff walls is essential to reduce and control the resultant uplift force (U), seepage discharge (Q), and exit Hydraulic gradient (i). This research investigates the effectiveness of inclined double cutoff walls under Hydraulic Structures, considering the influence of depths, locations, and inclination angles of the upstream and downstream cutoff walls by using Finite Element Method (FEM). The results confirmed that installing a deeper cutoff wall on the downstream reduces the exit gradient even further. In the case of the cutoff walls located in the upstream and downstream ends, the exit gradient will be less than when the cutoff walls are installed at a closer distance. Increasing the inclination angle of downstream cutoff wall has a major impact on exit gradient reduction. Embedment of cutoff walls in the upstream and downstream ends with right angles and equal depths reduces the seepage discharge more than other cases
Asaad M Armanuos - One of the best experts on this subject based on the ideXlab platform.
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impact of inclined double cutoff walls under Hydraulic Structures on uplift forces seepage discharge and exit Hydraulic gradient
Ain Shams Engineering Journal, 2021Co-Authors: Asaad M Armanuos, Abdelazim M Negm, A A Javadi, John Abraham, Tamer A GadoAbstract:Abstract In Hydraulic Structures design, using cutoff walls is essential to reduce and control the resultant uplift force (U), seepage discharge (Q), and exit Hydraulic gradient (i). This research investigates the effectiveness of inclined double cutoff walls under Hydraulic Structures, considering the influence of depths, locations, and inclination angles of the upstream and downstream cutoff walls by using Finite Element Method (FEM). The results confirmed that installing a deeper cutoff wall on the downstream reduces the exit gradient even further. In the case of the cutoff walls located in the upstream and downstream ends, the exit gradient will be less than when the cutoff walls are installed at a closer distance. Increasing the inclination angle of downstream cutoff wall has a major impact on exit gradient reduction. Embedment of cutoff walls in the upstream and downstream ends with right angles and equal depths reduces the seepage discharge more than other cases.
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Impact of inclined double-cutoff walls under Hydraulic Structures on uplift forces, seepage discharge and exit Hydraulic gradient
'Elsevier BV', 2021Co-Authors: Asaad M Armanuos, A A Javadi, Am Negm, Abraham J, Tamer A GadoAbstract:This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record In Hydraulic Structures design, using cutoff walls is essential to reduce and control the resultant uplift force (U), seepage discharge (Q), and exit Hydraulic gradient (i). This research investigates the effectiveness of inclined double cutoff walls under Hydraulic Structures, considering the influence of depths, locations, and inclination angles of the upstream and downstream cutoff walls by using Finite Element Method (FEM). The results confirmed that installing a deeper cutoff wall on the downstream reduces the exit gradient even further. In the case of the cutoff walls located in the upstream and downstream ends, the exit gradient will be less than when the cutoff walls are installed at a closer distance. Increasing the inclination angle of downstream cutoff wall has a major impact on exit gradient reduction. Embedment of cutoff walls in the upstream and downstream ends with right angles and equal depths reduces the seepage discharge more than other cases
Karol Plesinski - One of the best experts on this subject based on the ideXlab platform.
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plant basket Hydraulic Structures pbhs as a new river restoration measure
Science of The Total Environment, 2018Co-Authors: Tomasz Kaluza, Karol Plesinski, Artur Radeckipawlik, Krzysztof Szoszkiewicz, Bartosz Radeckipawlik, Ireneusz LaksAbstract:River restoration has become increasingly attractive worldwide as it provides considerable benefits to the environment as well as to the economy. This study focuses on changes of hydromorphological conditions in a small lowland river recorded during an experiment carried out in the Flinta River, central Poland. The proposed solution was a pilot project of the construction of vegetative sediment traps (plant basket Hydraulic Structures - PBHS). A set of three PBSH was installed in the riverbed in one row and a range of Hydraulic parameters were recorded over a period of three years (six measurement sessions). Changes of sediment grain size were analysed, and the amount and size of plant debris in the plant barriers were recorded. Plant debris accumulation influencing flow hydrodynamics was detected as a result of the installation of vegetative sediment traps. Moreover, various hydromorphological processes in the river were initiated. Additional simulations based on the detected processes showed that the proposed plant basket Hydraulic Structures can improve the hydromorphological status of the river.
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sediment transport processes related to the operation of a rapid Hydraulic structure boulder ramp in a mountain stream channel a polish carpathian example
2015Co-Authors: Karol Plesinski, Artur Radeckipawlik, Bartlomiej WyzgaAbstract:Rapid Hydraulic Structures—RHS—(called also boulder ramps) are modern, environment-friendly grade-control Structures which mimic natural riffles and do not disturb longitudinal continuity of the stream for fish and benthic invertebrates. Due to the reduction of Hydraulic gradient and backwater effect, such Hydraulic Structures change the pattern of sediment transport and deposition in the channel, facilitating persistence of alluvial streambed and the formation of gravel bars upstream and downstream of the Structures. This is of key importance for preserving habitats for benthic invertebrates and the spawning ground of lithophilic fish if a stream has to be channelized. At the same time, properly designed rapid Hydraulic Structures must allow efficient transfer of sediment flux through their apron, helping to clean the Structures of gravel and preventing their clogging. This study deals with observations and modeling of sediment transport in the vicinity of a rapid Hydraulic structure in a mountainous gravel-bed channel. The study aims to: (i) show the effects of RHS on sediment transported along a stream channel, and (ii) to evaluate the performance of CCHE2D model in predicting sediment phenomena along the stream with rapid Hydraulic Structures. The studied structure is located in Porebianka Stream draining a flysch catchment in the Polish Carpathians. We measured and calculated Hydraulic parameters characterizing the flow on and in the vicinity of the structure, such as velocity, dynamic velocity, shear stress, Froude number, Reynolds number and friction coefficient. The knowledge of those parameters allowed us, at the same time, to calculate sediment transport in the region of the structure using BAGS model for the Parker transport formula and parallel modeled the sediment transport with the CCHE2D model. The results show how the Hydraulic structure (enabling the migration of fish and benthic invertebrates), operates in terms of sediment transport processes (basically, giving the answer to the question: what is the influence of RHS on sediment transport) which form the channel morphology in its vicinity. In that context the CCHE2D model is discussed with its advantages and impediments.
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sediment transport processes related to the operation of a rapid Hydraulic structure boulder ramp in a mountain stream channel a polish carpathian example
2015Co-Authors: Karol Plesinski, Artur Radeckipawlik, Bartlomiej WyzgaAbstract:Rapid Hydraulic Structures—RHS—(called also boulder ramps) are modern, environment-friendly grade-control Structures which mimic natural riffles and do not disturb longitudinal continuity of the stream for fish and benthic invertebrates. Due to the reduction of Hydraulic gradient and backwater effect, such Hydraulic Structures change the pattern of sediment transport and deposition in the channel, facilitating persistence of alluvial streambed and the formation of gravel bars upstream and downstream of the Structures. This is of key importance for preserving habitats for benthic invertebrates and the spawning ground of lithophilic fish if a stream has to be channelized. At the same time, properly designed rapid Hydraulic Structures must allow efficient transfer of sediment flux through their apron, helping to clean the Structures of gravel and preventing their clogging. This study deals with observations and modeling of sediment transport in the vicinity of a rapid Hydraulic structure in a mountainous gravel-bed channel. The study aims to: (i) show the effects of RHS on sediment transported along a stream channel, and (ii) to evaluate the performance of CCHE2D model in predicting sediment phenomena along the stream with rapid Hydraulic Structures. The studied structure is located in Porebianka Stream draining a flysch catchment in the Polish Carpathians. We measured and calculated Hydraulic parameters characterizing the flow on and in the vicinity of the structure, such as velocity, dynamic velocity, shear stress, Froude number, Reynolds number and friction coefficient. The knowledge of those parameters allowed us, at the same time, to calculate sediment transport in the region of the structure using BAGS model for the Parker transport formula and parallel modeled the sediment transport with the CCHE2D model. The results show how the Hydraulic structure (enabling the migration of fish and benthic invertebrates), operates in terms of sediment transport processes (basically, giving the answer to the question: what is the influence of RHS on sediment transport) which form the channel morphology in its vicinity. In that context the CCHE2D model is discussed with its advantages and impediments.
Artur Radeckipawlik - One of the best experts on this subject based on the ideXlab platform.
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plant basket Hydraulic Structures pbhs as a new river restoration measure
Science of The Total Environment, 2018Co-Authors: Tomasz Kaluza, Karol Plesinski, Artur Radeckipawlik, Krzysztof Szoszkiewicz, Bartosz Radeckipawlik, Ireneusz LaksAbstract:River restoration has become increasingly attractive worldwide as it provides considerable benefits to the environment as well as to the economy. This study focuses on changes of hydromorphological conditions in a small lowland river recorded during an experiment carried out in the Flinta River, central Poland. The proposed solution was a pilot project of the construction of vegetative sediment traps (plant basket Hydraulic Structures - PBHS). A set of three PBSH was installed in the riverbed in one row and a range of Hydraulic parameters were recorded over a period of three years (six measurement sessions). Changes of sediment grain size were analysed, and the amount and size of plant debris in the plant barriers were recorded. Plant debris accumulation influencing flow hydrodynamics was detected as a result of the installation of vegetative sediment traps. Moreover, various hydromorphological processes in the river were initiated. Additional simulations based on the detected processes showed that the proposed plant basket Hydraulic Structures can improve the hydromorphological status of the river.
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sediment transport processes related to the operation of a rapid Hydraulic structure boulder ramp in a mountain stream channel a polish carpathian example
2015Co-Authors: Karol Plesinski, Artur Radeckipawlik, Bartlomiej WyzgaAbstract:Rapid Hydraulic Structures—RHS—(called also boulder ramps) are modern, environment-friendly grade-control Structures which mimic natural riffles and do not disturb longitudinal continuity of the stream for fish and benthic invertebrates. Due to the reduction of Hydraulic gradient and backwater effect, such Hydraulic Structures change the pattern of sediment transport and deposition in the channel, facilitating persistence of alluvial streambed and the formation of gravel bars upstream and downstream of the Structures. This is of key importance for preserving habitats for benthic invertebrates and the spawning ground of lithophilic fish if a stream has to be channelized. At the same time, properly designed rapid Hydraulic Structures must allow efficient transfer of sediment flux through their apron, helping to clean the Structures of gravel and preventing their clogging. This study deals with observations and modeling of sediment transport in the vicinity of a rapid Hydraulic structure in a mountainous gravel-bed channel. The study aims to: (i) show the effects of RHS on sediment transported along a stream channel, and (ii) to evaluate the performance of CCHE2D model in predicting sediment phenomena along the stream with rapid Hydraulic Structures. The studied structure is located in Porebianka Stream draining a flysch catchment in the Polish Carpathians. We measured and calculated Hydraulic parameters characterizing the flow on and in the vicinity of the structure, such as velocity, dynamic velocity, shear stress, Froude number, Reynolds number and friction coefficient. The knowledge of those parameters allowed us, at the same time, to calculate sediment transport in the region of the structure using BAGS model for the Parker transport formula and parallel modeled the sediment transport with the CCHE2D model. The results show how the Hydraulic structure (enabling the migration of fish and benthic invertebrates), operates in terms of sediment transport processes (basically, giving the answer to the question: what is the influence of RHS on sediment transport) which form the channel morphology in its vicinity. In that context the CCHE2D model is discussed with its advantages and impediments.
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sediment transport processes related to the operation of a rapid Hydraulic structure boulder ramp in a mountain stream channel a polish carpathian example
2015Co-Authors: Karol Plesinski, Artur Radeckipawlik, Bartlomiej WyzgaAbstract:Rapid Hydraulic Structures—RHS—(called also boulder ramps) are modern, environment-friendly grade-control Structures which mimic natural riffles and do not disturb longitudinal continuity of the stream for fish and benthic invertebrates. Due to the reduction of Hydraulic gradient and backwater effect, such Hydraulic Structures change the pattern of sediment transport and deposition in the channel, facilitating persistence of alluvial streambed and the formation of gravel bars upstream and downstream of the Structures. This is of key importance for preserving habitats for benthic invertebrates and the spawning ground of lithophilic fish if a stream has to be channelized. At the same time, properly designed rapid Hydraulic Structures must allow efficient transfer of sediment flux through their apron, helping to clean the Structures of gravel and preventing their clogging. This study deals with observations and modeling of sediment transport in the vicinity of a rapid Hydraulic structure in a mountainous gravel-bed channel. The study aims to: (i) show the effects of RHS on sediment transported along a stream channel, and (ii) to evaluate the performance of CCHE2D model in predicting sediment phenomena along the stream with rapid Hydraulic Structures. The studied structure is located in Porebianka Stream draining a flysch catchment in the Polish Carpathians. We measured and calculated Hydraulic parameters characterizing the flow on and in the vicinity of the structure, such as velocity, dynamic velocity, shear stress, Froude number, Reynolds number and friction coefficient. The knowledge of those parameters allowed us, at the same time, to calculate sediment transport in the region of the structure using BAGS model for the Parker transport formula and parallel modeled the sediment transport with the CCHE2D model. The results show how the Hydraulic structure (enabling the migration of fish and benthic invertebrates), operates in terms of sediment transport processes (basically, giving the answer to the question: what is the influence of RHS on sediment transport) which form the channel morphology in its vicinity. In that context the CCHE2D model is discussed with its advantages and impediments.
A A Javadi - One of the best experts on this subject based on the ideXlab platform.
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impact of inclined double cutoff walls under Hydraulic Structures on uplift forces seepage discharge and exit Hydraulic gradient
Ain Shams Engineering Journal, 2021Co-Authors: Asaad M Armanuos, Abdelazim M Negm, A A Javadi, John Abraham, Tamer A GadoAbstract:Abstract In Hydraulic Structures design, using cutoff walls is essential to reduce and control the resultant uplift force (U), seepage discharge (Q), and exit Hydraulic gradient (i). This research investigates the effectiveness of inclined double cutoff walls under Hydraulic Structures, considering the influence of depths, locations, and inclination angles of the upstream and downstream cutoff walls by using Finite Element Method (FEM). The results confirmed that installing a deeper cutoff wall on the downstream reduces the exit gradient even further. In the case of the cutoff walls located in the upstream and downstream ends, the exit gradient will be less than when the cutoff walls are installed at a closer distance. Increasing the inclination angle of downstream cutoff wall has a major impact on exit gradient reduction. Embedment of cutoff walls in the upstream and downstream ends with right angles and equal depths reduces the seepage discharge more than other cases.
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Impact of inclined double-cutoff walls under Hydraulic Structures on uplift forces, seepage discharge and exit Hydraulic gradient
'Elsevier BV', 2021Co-Authors: Asaad M Armanuos, A A Javadi, Am Negm, Abraham J, Tamer A GadoAbstract:This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record In Hydraulic Structures design, using cutoff walls is essential to reduce and control the resultant uplift force (U), seepage discharge (Q), and exit Hydraulic gradient (i). This research investigates the effectiveness of inclined double cutoff walls under Hydraulic Structures, considering the influence of depths, locations, and inclination angles of the upstream and downstream cutoff walls by using Finite Element Method (FEM). The results confirmed that installing a deeper cutoff wall on the downstream reduces the exit gradient even further. In the case of the cutoff walls located in the upstream and downstream ends, the exit gradient will be less than when the cutoff walls are installed at a closer distance. Increasing the inclination angle of downstream cutoff wall has a major impact on exit gradient reduction. Embedment of cutoff walls in the upstream and downstream ends with right angles and equal depths reduces the seepage discharge more than other cases
