TY  - JOUR
AU  - Ghobadian, Rasool
AU  - Đorđević, Dejana
AU  - Basiri, Masha
PY  - 2021
UR  - http://gf.ukim.edu.mk/wp-content/uploads/2017/12/SJCE-vol.-10.pdf
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2445
AB  - River bends are rarely simple, i.e., the bend radius is rarely constant throughout the bend length. They are rather irregular, i.e. their shape in the plan can be approximated with different bend radii. Since the bulk of previous research is concerned with simple bends, this paper aims at studying the effect of variable bend curvature on flow in an irregular bend with two bend radii. The effect is studied numerically, using a 3D finite volume based model SSIIM1, which solves Reynolds-Averaged Navier-Stokes (RANS) equations with two-equation turbulence model closure. After successful calibration against experimental data from the simple 180° bend, the model is used to simulate flow in 180° variable curvature bends with the following combinations of relative curvature: mild-mild, mild-sharp and sharp-mild. Results have shown that: (1) The maximum spanwise water surface slope always develops at the entrance to the sharp bend, (2) the greatest slope develops in the sharp-mild layout, (3) the location where the maximum velocity path cuts the bend centerline does not change with the bend layout (simple or variable curvature), (4) the bend curvature sequence affects lateral velocity distributions of the streamwise velocity only in the middle of the bend, (5) the relative curvature sequence has an adverse effect on the size of two regions with maximum bed shear stress – one around the curvature inflection point and the other close to the bend exit.
PB  - Faculty of Civil Engineering - Skopje
PB  - Градежен факултет – Скопје
T2  - Scientific Journal of Civil Engineering
T1  - Assessment of the impact of bend type on flow characteristics in 180° compound bends
EP  - 35
IS  - 1
SP  - 23
VL  - 10
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2445
ER  - 

@article{
author = "Ghobadian, Rasool and Đorđević, Dejana and Basiri, Masha",
year = "2021",
abstract = "River bends are rarely simple, i.e., the bend radius is rarely constant throughout the bend length. They are rather irregular, i.e. their shape in the plan can be approximated with different bend radii. Since the bulk of previous research is concerned with simple bends, this paper aims at studying the effect of variable bend curvature on flow in an irregular bend with two bend radii. The effect is studied numerically, using a 3D finite volume based model SSIIM1, which solves Reynolds-Averaged Navier-Stokes (RANS) equations with two-equation turbulence model closure. After successful calibration against experimental data from the simple 180° bend, the model is used to simulate flow in 180° variable curvature bends with the following combinations of relative curvature: mild-mild, mild-sharp and sharp-mild. Results have shown that: (1) The maximum spanwise water surface slope always develops at the entrance to the sharp bend, (2) the greatest slope develops in the sharp-mild layout, (3) the location where the maximum velocity path cuts the bend centerline does not change with the bend layout (simple or variable curvature), (4) the bend curvature sequence affects lateral velocity distributions of the streamwise velocity only in the middle of the bend, (5) the relative curvature sequence has an adverse effect on the size of two regions with maximum bed shear stress – one around the curvature inflection point and the other close to the bend exit.",
publisher = "Faculty of Civil Engineering - Skopje, Градежен факултет – Скопје",
journal = "Scientific Journal of Civil Engineering",
title = "Assessment of the impact of bend type on flow characteristics in 180° compound bends",
pages = "35-23",
number = "1",
volume = "10",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2445"
}

Ghobadian, R., Đorđević, D.,& Basiri, M.. (2021). Assessment of the impact of bend type on flow characteristics in 180° compound bends. in Scientific Journal of Civil Engineering
Faculty of Civil Engineering - Skopje., 10(1), 23-35.
https://hdl.handle.net/21.15107/rcub_grafar_2445

Ghobadian R, Đorđević D, Basiri M. Assessment of the impact of bend type on flow characteristics in 180° compound bends. in Scientific Journal of Civil Engineering. 2021;10(1):23-35.
https://hdl.handle.net/21.15107/rcub_grafar_2445 .

Ghobadian, Rasool, Đorđević, Dejana, Basiri, Masha, "Assessment of the impact of bend type on flow characteristics in 180° compound bends" in Scientific Journal of Civil Engineering, 10, no. 1 (2021):23-35,
https://hdl.handle.net/21.15107/rcub_grafar_2445 .

TY  - JOUR
AU  - Hosseini Mobara, Seyed Erfan
AU  - Ghobadian, Rasool
AU  - Rouzbahani, Fardin
AU  - Đorđević, Dejana
PY  - 2021
UR  - https://ezproxy.nb.rs:2134/content/pdf/10.1007/s10064-021-02163-z.pdf
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2448
AB  - Landslide phenomenon in accumulated erodible bed sediments in a reservoir is one of the issues in hydraulic and sedimentation sciences that has received little attention. We intend to model two-dimensional changes of the water surface in a reservoir and of an erodible bed caused by a non-rigid landslide using a particle-based meshless approach. In this study, a fully explicit three-step algorithm is used. In this method, approximate numerical solution to the equations of the fluid dynamics is obtained by replacing the fluid with a set of particles. The governing equations for water flow and sand mass movement are solved for each particle. The movement of each particle, which is in interaction with other particles, is tracked. Experiments of a dam break on a dry bed, and submarine rigid and non-rigid landslides have been used to validate the method. Results indicate that the model was successfully calibrated against the measured data. Moreover, good agreement with the measured data demonstrates high capabilities of this method in simulating free-surface flows and wave-related phenomena. After the model validation, changes of erodible bed in a reservoir due to a non-rigid landslide were modelled. In this study, non-rigid landslide masses and sediment materials were modelled by non-Newtonian Carreau-Yasuda fluid, which is the novelty in the analysis of this type of natural hazard. Two possible scenarios were analyzed—one with the sliding material lighter, and the other with the sliding material heavier than the deposited sediments. The model was run until the landslide completely collapsed and its full impact was applied to the reservoir bed sediments. Additionally, we waited until the water level reached a steady state. These examples demonstrate that the model presented in this paper can be used as a reliable tool for modelling these phenomena.
PB  - Springer
PB  - International Association for Engineering Geology and the Environment (IAEG)
T2  - Bulletin of Engineering Geology and the Environment
T1  - Numerical simulation of non-rigid landslide into reservoir with erodible sediment bed using SPH method
EP  - 4366
IS  - 6
SP  - 4347
VL  - 80
DO  - 10.1007/s10064-021-02163-z
ER  - 

@article{
author = "Hosseini Mobara, Seyed Erfan and Ghobadian, Rasool and Rouzbahani, Fardin and Đorđević, Dejana",
year = "2021",
abstract = "Landslide phenomenon in accumulated erodible bed sediments in a reservoir is one of the issues in hydraulic and sedimentation sciences that has received little attention. We intend to model two-dimensional changes of the water surface in a reservoir and of an erodible bed caused by a non-rigid landslide using a particle-based meshless approach. In this study, a fully explicit three-step algorithm is used. In this method, approximate numerical solution to the equations of the fluid dynamics is obtained by replacing the fluid with a set of particles. The governing equations for water flow and sand mass movement are solved for each particle. The movement of each particle, which is in interaction with other particles, is tracked. Experiments of a dam break on a dry bed, and submarine rigid and non-rigid landslides have been used to validate the method. Results indicate that the model was successfully calibrated against the measured data. Moreover, good agreement with the measured data demonstrates high capabilities of this method in simulating free-surface flows and wave-related phenomena. After the model validation, changes of erodible bed in a reservoir due to a non-rigid landslide were modelled. In this study, non-rigid landslide masses and sediment materials were modelled by non-Newtonian Carreau-Yasuda fluid, which is the novelty in the analysis of this type of natural hazard. Two possible scenarios were analyzed—one with the sliding material lighter, and the other with the sliding material heavier than the deposited sediments. The model was run until the landslide completely collapsed and its full impact was applied to the reservoir bed sediments. Additionally, we waited until the water level reached a steady state. These examples demonstrate that the model presented in this paper can be used as a reliable tool for modelling these phenomena.",
publisher = "Springer, International Association for Engineering Geology and the Environment (IAEG)",
journal = "Bulletin of Engineering Geology and the Environment",
title = "Numerical simulation of non-rigid landslide into reservoir with erodible sediment bed using SPH method",
pages = "4366-4347",
number = "6",
volume = "80",
doi = "10.1007/s10064-021-02163-z"
}

Hosseini Mobara, S. E., Ghobadian, R., Rouzbahani, F.,& Đorđević, D.. (2021). Numerical simulation of non-rigid landslide into reservoir with erodible sediment bed using SPH method. in Bulletin of Engineering Geology and the Environment
Springer., 80(6), 4347-4366.
https://doi.org/10.1007/s10064-021-02163-z

Hosseini Mobara SE, Ghobadian R, Rouzbahani F, Đorđević D. Numerical simulation of non-rigid landslide into reservoir with erodible sediment bed using SPH method. in Bulletin of Engineering Geology and the Environment. 2021;80(6):4347-4366.
doi:10.1007/s10064-021-02163-z .

Hosseini Mobara, Seyed Erfan, Ghobadian, Rasool, Rouzbahani, Fardin, Đorđević, Dejana, "Numerical simulation of non-rigid landslide into reservoir with erodible sediment bed using SPH method" in Bulletin of Engineering Geology and the Environment, 80, no. 6 (2021):4347-4366,
https://doi.org/10.1007/s10064-021-02163-z . .

TY  - JOUR
AU  - Hosseini Mobara, Seyed Erfan
AU  - Ghobadian, Rasool
AU  - Rouzbahani, Fardin
AU  - Đorđević, Dejana
PY  - 2021
UR  - https://www.sciencedirect.com/science/article/pii/S0955799721001545
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2449
AB  - Deformable landslide body is modeled as a rheological material when SPH methods are used for numerical simulations. To increase accuracy, Carreau-Yasuda rheological model is chosen in this study. The model overcomes the weakness of the power-law model in predicting viscosity at zero and infinite shear strain rates. Also, a fully explicit three-step algorithm is proposed to solve governing equations. In the first step, intermediate velocities are computed in the presence of body forces. In the second step , they are used to compute divergence of stress tensor and to find intermediate particle positions. In the third step, pressure gradient in the momentum equation is merged with the continuity equation, and final particle velocity is calculated at the end of the time step. The algorithm is used in combination with Carreau-Yasuda model to simulate submarine non-rigid landslide. Comparison with experimental data indicates good agreement between calculated and observed water surface elevations with very low L2 relative error norm(εL2) and RMSE values. They are up to 70% lower than those from previous studies when Cross and Bingham rheological models were used with ISPH and WCSPH models, respectively. Moreover, shape and advancement of the non-rigid body made of sand are well captured.
PB  - Elsevier
T2  - Engineering Analysis with Boundary Elements
T1  - Numerical simulation of Submarine non-rigid landslide by an explicit three-step incompressible smoothed particle hydrodynamics
EP  - 208
SP  - 196
VL  - 130
DO  - 10.1016/j.enganabound.2021.05.025
ER  - 

@article{
author = "Hosseini Mobara, Seyed Erfan and Ghobadian, Rasool and Rouzbahani, Fardin and Đorđević, Dejana",
year = "2021",
abstract = "Deformable landslide body is modeled as a rheological material when SPH methods are used for numerical simulations. To increase accuracy, Carreau-Yasuda rheological model is chosen in this study. The model overcomes the weakness of the power-law model in predicting viscosity at zero and infinite shear strain rates. Also, a fully explicit three-step algorithm is proposed to solve governing equations. In the first step, intermediate velocities are computed in the presence of body forces. In the second step , they are used to compute divergence of stress tensor and to find intermediate particle positions. In the third step, pressure gradient in the momentum equation is merged with the continuity equation, and final particle velocity is calculated at the end of the time step. The algorithm is used in combination with Carreau-Yasuda model to simulate submarine non-rigid landslide. Comparison with experimental data indicates good agreement between calculated and observed water surface elevations with very low L2 relative error norm(εL2) and RMSE values. They are up to 70% lower than those from previous studies when Cross and Bingham rheological models were used with ISPH and WCSPH models, respectively. Moreover, shape and advancement of the non-rigid body made of sand are well captured.",
publisher = "Elsevier",
journal = "Engineering Analysis with Boundary Elements",
title = "Numerical simulation of Submarine non-rigid landslide by an explicit three-step incompressible smoothed particle hydrodynamics",
pages = "208-196",
volume = "130",
doi = "10.1016/j.enganabound.2021.05.025"
}

Hosseini Mobara, S. E., Ghobadian, R., Rouzbahani, F.,& Đorđević, D.. (2021). Numerical simulation of Submarine non-rigid landslide by an explicit three-step incompressible smoothed particle hydrodynamics. in Engineering Analysis with Boundary Elements
Elsevier., 130, 196-208.
https://doi.org/10.1016/j.enganabound.2021.05.025

Hosseini Mobara SE, Ghobadian R, Rouzbahani F, Đorđević D. Numerical simulation of Submarine non-rigid landslide by an explicit three-step incompressible smoothed particle hydrodynamics. in Engineering Analysis with Boundary Elements. 2021;130:196-208.
doi:10.1016/j.enganabound.2021.05.025 .

Hosseini Mobara, Seyed Erfan, Ghobadian, Rasool, Rouzbahani, Fardin, Đorđević, Dejana, "Numerical simulation of Submarine non-rigid landslide by an explicit three-step incompressible smoothed particle hydrodynamics" in Engineering Analysis with Boundary Elements, 130 (2021):196-208,
https://doi.org/10.1016/j.enganabound.2021.05.025 . .

TY  - JOUR
AU  - Hosseini Mobara, Seyed Erfan
AU  - Ghobadian, Rasool
AU  - Rouzbahani, Fardin
AU  - Đorđević, Dejana
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2450
AB  - Many landslides in nature may be classified as deformable landslides. The landslide volume is usually modeled as a rheological material when SPH methods are used for landslide simulation, since these methods allow for the use of particles with different fluid properties. To increase the accuracy, the Carreau-Yasuda model is chosen in this study to predict the behavior of the rheological material. This rheological model overcomes the weakness of the power-law model in predicting the viscosity at zero and infinite shear strain rates. Also, a fully explicit three-step algorithm is proposed to solve the governing equations. In the first step, the momentum equation is solved in the presence of the body forces while neglecting all other forces. In this step intermediate velocity values are computed. In the second step, the calculated intermediate velocities are employed to compute divergence of the stress tensor, and velocity components of each particle are updated to find their intermediate positions. These two steps are called predictor steps. In the third, corrector step, the pressure gradient in the momentum equation is merged with the continuity equation, and lastly the final particle velocity is calculated at the end of the time step. The fully explicit three-step algorithm is used in combination with Carreau-Yasuda model to simulate the submarine non-rigid landslide from the physical model. The comparison with the experimental data indicates good agreement between the calculated and observed water surface elevations with very low L2 relative error norm (L2) and RMSE values that are up to 70% lower than those from previous studies when Cross and Bingham rheological models were used with ISPH and WCSPH models, respectively. Moreover, the shape and the advancement of the non-rigid body made of sand are captured equally good.
PB  - Elsevier
T2  - Engineering Analysis with Boundary Elements
T1  - Numerical simulation  of Submarine non-rigid landslide by an explicit three-step incompressible smoothed  particle hydrodynamics
EP  - 208
SP  - 196
VL  - 130
DO  - 10.1016/j.enganabound.2021.05.025
ER  - 

@article{
author = "Hosseini Mobara, Seyed Erfan and Ghobadian, Rasool and Rouzbahani, Fardin and Đorđević, Dejana",
year = "2021",
abstract = "Many landslides in nature may be classified as deformable landslides. The landslide volume is usually modeled as a rheological material when SPH methods are used for landslide simulation, since these methods allow for the use of particles with different fluid properties. To increase the accuracy, the Carreau-Yasuda model is chosen in this study to predict the behavior of the rheological material. This rheological model overcomes the weakness of the power-law model in predicting the viscosity at zero and infinite shear strain rates. Also, a fully explicit three-step algorithm is proposed to solve the governing equations. In the first step, the momentum equation is solved in the presence of the body forces while neglecting all other forces. In this step intermediate velocity values are computed. In the second step, the calculated intermediate velocities are employed to compute divergence of the stress tensor, and velocity components of each particle are updated to find their intermediate positions. These two steps are called predictor steps. In the third, corrector step, the pressure gradient in the momentum equation is merged with the continuity equation, and lastly the final particle velocity is calculated at the end of the time step. The fully explicit three-step algorithm is used in combination with Carreau-Yasuda model to simulate the submarine non-rigid landslide from the physical model. The comparison with the experimental data indicates good agreement between the calculated and observed water surface elevations with very low L2 relative error norm (L2) and RMSE values that are up to 70% lower than those from previous studies when Cross and Bingham rheological models were used with ISPH and WCSPH models, respectively. Moreover, the shape and the advancement of the non-rigid body made of sand are captured equally good.",
publisher = "Elsevier",
journal = "Engineering Analysis with Boundary Elements",
title = "Numerical simulation  of Submarine non-rigid landslide by an explicit three-step incompressible smoothed  particle hydrodynamics",
pages = "208-196",
volume = "130",
doi = "10.1016/j.enganabound.2021.05.025"
}

Hosseini Mobara, S. E., Ghobadian, R., Rouzbahani, F.,& Đorđević, D.. (2021). Numerical simulation  of Submarine non-rigid landslide by an explicit three-step incompressible smoothed  particle hydrodynamics. in Engineering Analysis with Boundary Elements
Elsevier., 130, 196-208.
https://doi.org/10.1016/j.enganabound.2021.05.025

Hosseini Mobara SE, Ghobadian R, Rouzbahani F, Đorđević D. Numerical simulation  of Submarine non-rigid landslide by an explicit three-step incompressible smoothed  particle hydrodynamics. in Engineering Analysis with Boundary Elements. 2021;130:196-208.
doi:10.1016/j.enganabound.2021.05.025 .

Hosseini Mobara, Seyed Erfan, Ghobadian, Rasool, Rouzbahani, Fardin, Đorđević, Dejana, "Numerical simulation  of Submarine non-rigid landslide by an explicit three-step incompressible smoothed  particle hydrodynamics" in Engineering Analysis with Boundary Elements, 130 (2021):196-208,
https://doi.org/10.1016/j.enganabound.2021.05.025 . .

TY  - CONF
AU  - Ghobadian, Rasool
AU  - Đorđević, Dejana
AU  - Ghanbari, Sara
PY  - 2017
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2330
AB  - River confluences play an important role in the drainage of a catchment and transport of sediments and pollutants within this area. Riverbed morphology at these important nodes of the river drainage network might be very complex as shown by numerous laboratory studies in movable bed models and scarce bathymetric surveys in the field. Different parameters were varied in laboratory confluences to infer which of them control morphodynamic processes at the confluence. It was shown that the development of three characteristic morphological elements,
i.e. a bar with an avalanche face at the entrance of a tributary channel to the confluence, a scour hole and a separation zone bar in the confluence hydrodynamics zone, depended on: 1) the confluence plan-view (symmetrical or asymmetrical), 2) the junction angle, 3) the channel width ratio, 4) discharge and momentum-flux ratios of the combining flows, 5) sediment loads supplied into one or both upstream channels and 6) the sediment size of the bed material and of supplied sediments. However, most of studies were conducted with uniform sediments. There are only a few laboratory and numerical studies on the effect of bed material gradation on the erosion and deposition patterns in the confluence hydrodynamics zone (CHZ).
This study, thus, focuses on effects that bed material grain-size distribution (GSD) has on these patterns at a river confluence. A layout of a 60o laboratory confluence of two straight channels with channel width ratio BT /BR=0.71 (where BT and BR are widths of tributary and main channels, respectively) is chosen for this numerical study. The laboratory confluence was created to study sediment transport and bed morphology at the confluence whose bed is filled with uniform sediments of D = 1.95 mm size. The experimental data from this confluence are selected for validation of a 3D finite-volume based model SSIIM1 that is used in the present study. Effects of GSD are analysed for four materials having the same D50 as the uniform sediment (1.95 mm), but different values of standard deviation (σ ∈(1.5, 2.9)).
It is shown that the scour hole is extended further downstream from the separation zone with the increasing nonuniformity of the bed material (increasing σ). However, the zone of maximum scour and its inclination angle with respect to the main channel axis are reduced and moved towards the downstream junction corner. There is pronounced self-armouring of a riverbed within the CHZ. The self-armouring accelerates both bed scouring and the deposition of coarse particles in the flow separation zone. However, it has an adverse effect on the scouring and deposition – the scouring is reduced, while the height of the separation zone bar is increased. Additionally, it is observed that the water surface and bed profiles are out of phase. The maximal water surface elevation is located above the bottom of the scour hole. Water surface longitudinal gradients increase with the increase in the σ-value due to reduction of the scour-hole size and the upstream shift of the bar crest. The possible corridor of sediment movement in the CHZ is a narrow strip which skirts the separation zone bar.
PB  - EGU (European Geophysical Union)
C3  - Geophysical Research Abstracts-EGU General Assembly 2017
T1  - Effects of bed material grain-size distribution on bed morphology at a river confluence - numerical study
SP  - EGU2017-19335
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2330
ER  - 

@conference{
author = "Ghobadian, Rasool and Đorđević, Dejana and Ghanbari, Sara",
year = "2017",
abstract = "River confluences play an important role in the drainage of a catchment and transport of sediments and pollutants within this area. Riverbed morphology at these important nodes of the river drainage network might be very complex as shown by numerous laboratory studies in movable bed models and scarce bathymetric surveys in the field. Different parameters were varied in laboratory confluences to infer which of them control morphodynamic processes at the confluence. It was shown that the development of three characteristic morphological elements,
i.e. a bar with an avalanche face at the entrance of a tributary channel to the confluence, a scour hole and a separation zone bar in the confluence hydrodynamics zone, depended on: 1) the confluence plan-view (symmetrical or asymmetrical), 2) the junction angle, 3) the channel width ratio, 4) discharge and momentum-flux ratios of the combining flows, 5) sediment loads supplied into one or both upstream channels and 6) the sediment size of the bed material and of supplied sediments. However, most of studies were conducted with uniform sediments. There are only a few laboratory and numerical studies on the effect of bed material gradation on the erosion and deposition patterns in the confluence hydrodynamics zone (CHZ).
This study, thus, focuses on effects that bed material grain-size distribution (GSD) has on these patterns at a river confluence. A layout of a 60o laboratory confluence of two straight channels with channel width ratio BT /BR=0.71 (where BT and BR are widths of tributary and main channels, respectively) is chosen for this numerical study. The laboratory confluence was created to study sediment transport and bed morphology at the confluence whose bed is filled with uniform sediments of D = 1.95 mm size. The experimental data from this confluence are selected for validation of a 3D finite-volume based model SSIIM1 that is used in the present study. Effects of GSD are analysed for four materials having the same D50 as the uniform sediment (1.95 mm), but different values of standard deviation (σ ∈(1.5, 2.9)).
It is shown that the scour hole is extended further downstream from the separation zone with the increasing nonuniformity of the bed material (increasing σ). However, the zone of maximum scour and its inclination angle with respect to the main channel axis are reduced and moved towards the downstream junction corner. There is pronounced self-armouring of a riverbed within the CHZ. The self-armouring accelerates both bed scouring and the deposition of coarse particles in the flow separation zone. However, it has an adverse effect on the scouring and deposition – the scouring is reduced, while the height of the separation zone bar is increased. Additionally, it is observed that the water surface and bed profiles are out of phase. The maximal water surface elevation is located above the bottom of the scour hole. Water surface longitudinal gradients increase with the increase in the σ-value due to reduction of the scour-hole size and the upstream shift of the bar crest. The possible corridor of sediment movement in the CHZ is a narrow strip which skirts the separation zone bar.",
publisher = "EGU (European Geophysical Union)",
journal = "Geophysical Research Abstracts-EGU General Assembly 2017",
title = "Effects of bed material grain-size distribution on bed morphology at a river confluence - numerical study",
pages = "EGU2017-19335",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2330"
}

Ghobadian, R., Đorđević, D.,& Ghanbari, S.. (2017). Effects of bed material grain-size distribution on bed morphology at a river confluence - numerical study. in Geophysical Research Abstracts-EGU General Assembly 2017
EGU (European Geophysical Union)., 19, EGU2017-19335.
https://hdl.handle.net/21.15107/rcub_grafar_2330

Ghobadian R, Đorđević D, Ghanbari S. Effects of bed material grain-size distribution on bed morphology at a river confluence - numerical study. in Geophysical Research Abstracts-EGU General Assembly 2017. 2017;19:EGU2017-19335.
https://hdl.handle.net/21.15107/rcub_grafar_2330 .

Ghobadian, Rasool, Đorđević, Dejana, Ghanbari, Sara, "Effects of bed material grain-size distribution on bed morphology at a river confluence - numerical study" in Geophysical Research Abstracts-EGU General Assembly 2017, 19 (2017):EGU2017-19335,
https://hdl.handle.net/21.15107/rcub_grafar_2330 .