Publications (7)
COMMUNICATION
3D CFD modelling of reservoir sedimentation pressure flushing at hydropower dams
Ousmane Sawadogo, G.R. Basson.
This paper investigates local sediment flushing under pressure at dams through a low-level outlet for the control of reservoir sedimentation to protect the hydropower turbines. A state-of-the-art three dimensional fully hydrodynamic computational fluid dynamic (CFD) model was developed with user defined functions which link the sediment mass b(...)
hydropower dam; hydrodynamics; sedimentation; CFD model; sediment flushing
COMMUNICATION
Coupled fully 3D numerical modelling of local sediment flushing scour at dam bottom outlet
Ousmane Sawadogo, G.R. Basson
Reservoir sedimentation is not only a serious threat to water storage capacity, but it could also undermine some hydraulic structures such as hydropower intakes and bottom outlets. This paper first describes the development of a coupled fully three-dimensional (3D)
numerical model for the prediction of the local pressured sediment flushing sc(...)
Reservoir sedimentation, hydraulic modelling, sediment transport modelling, CFD (Computational Fluid Dynamics), local scour.
ARTICLE
Optimization of sand trap and settler designs for efficient deposition of suspended sediment.
Claudia Mc Leod, Ousmane Sawadogo and Gerrit Basson.
Sediment traps are structures designed to allow the suspended sediment load, which enters river abstraction works or diversion canals, to deposit whilst relatively clean water passes through. The deposited sediment is then removed by making use of gravitational flushing. The sediment traps discussed in this paper are settlers and sand traps. T(...)
Sand trap, settler, settling velocity, settling length, numerical models, CFD
ARTICLE
Physical and coupled fully three-dimensional numerical modeling of pressurized bottom outlet flushing processes in reservoirs
Ousmane Sawadogo, Gerrit R. Basson, Simon Schneiderbauer
Sediment deposition in reservoirs is an important research topic in engineering practice. Reservoir
sedimentation has the potential to affect flood levels, drainage for agricultural land, pump station and
hydropower operation as well as navigation. This paper describes the development of a coupled fully
three-dimensional (3D) numerical mode(...)
Bottom outlet Coupled flow/sediment model Sediment flushing 3D numerical model Packed bed Reservoir
ARTICLE
Sediment Yield Modelling Considering Future Land use Change: Case Study of the Usuthu River Catchment in South Africa and Swaziland
O. Sawadogo, G. R. Basson
In order to develop an integrated water resources development plan, accurate prediction of sediment yields in a catchment is important. The physically based and distributed hydrological model SHETRAN was applied to a sub-catchment of the Usuthu River, which has a total area of 3577 km2 , located in South Africa and Swaziland. The aim of the mo(...)
Basin, Erosion, Numerical model, Runoff, Sedimentation, Jericho Dam, Heyshope Dam, Morgenstond Dam.
ARTICLE
3D fully coupled numerical modelling of local sediment flushing scour at dam bottom outlets for sustainable hydropower operation
O. Sawadogo, G. R. Basson
To protect hydropower intakes a three dimensional hydrodynamic CFD model can be used to simulate the streamlines, sediment transport and local scour accurately upstream of a bottom outlet or sediment flushing tunnel. This paper focuses on the simulation of flow and sediment transport patterns upstream of a dam
bottom outlet. This paper first(...)
hydropower intakes, CFD model, sediment transport, coupled fully 3D numerical model, flushing scour
ARTICLE
Computational Fluid Dynamic (CFD) modelling in 3D of turbulent suspended sediment transport processes in reservoirs
O. Sawadogo, G. R. Basson
Sediment deposition in reservoirs can affect flood levels, drainage from agriculture land, the firm yield of a dam, hydropower operation and navigation. Turbulent suspended sediment transport is the dominant mechanism of sediment transport through most reservoirs. This paper focuses on the simulation of flow and sediment transport pattern(...)
CFD model, suspended sediment, reservoirs, sediment transport, deposition, entrainment