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Sediment Distribution of the River Boundary Layer DOI:  https://doi.org/10.30564/jgr.v3i1.1844 Abstract The movement of particles on the river boundary layer is a complex phenomena which can be never solved by a deterministic approach. The unsteady non uniform conditions in flow boundary layer show the result of water surface and bed stream changing with time and location of particles. To determine the movement of boundary layer particles other new theories about stochastic processes using the theory of probability and statistics in river alluvial channels will give better results. Keywords:  Sediment transport, Unsteady, Stochastic, Stream

Empirical Studies in Alluvial Streams DOI:  https://doi.org/10.30564/jgr.v3i1.1668 Abstract Meander flow takes place in one single channel which oscillates more or less regularly with amplitudes that tend to increase with time. Meanders are found in beds of fine sediments with gentle slopes. In this study, effort will be made to investigate meanders’ turbulent boundary layer and to improve the present knowledge about the river meandering phenomena. It is assumed that the development of the perturbations which develop into meanders or braids, is longer than the width of the channel. Interaction be tween the flow and mobile boundaries produces channel patterns which are classified as meandering or braided. It is therefore long compared with the ripples or dunes which cover the bed of such a channel and whose wave length is shorter than the width of the channel. The variation of resistance to flow and rate of transport of bed material with velocity are discussed briefly and taken into...

Discussion at Maximum Sediment Discharge Theory DOI:  https://doi.org/10.30564/jgr.v3i1.1572 Abstract It is observed the gravel river sediment discharge with existing empirical regime relationships. The aim of the research is to give a mathematical model about the stable cross-section geometry and to determine a model for the stable slope of an alluvial channel which is in nature seldom stable. In an alluvial channel to reach an equilibrium condition, it changes its plane geometry until to have a stable condition in plane configuration. There are three different parameters in plan configuration about river behavior: width, depth and slope. Keywords:  Sediment transport, Mathematical model, Empirical regime relationship

Evaluation of Sediment Yield Predicting Models of Ghana DOI:  https://doi.org/10.30564/jgr.v4i1.2596 Abstract Fluvial sediment transport data is a very important data for effective water resource management. However, acquiring this data is expensive and tedious hence sediment yield modeling has become an alternative approach in estimating river sediment yields. In Ghana, several sediment yield predicting models have been developed to estimate the sediment yields of ungauged rivers including the Pra River Basin. In this paper, 10 months sediment yield data of the Pra River Basin was used to evaluate the existing sediment yield predicting models of Ghana. A regression analysis between predicted sediment yield data derived from the models and the observed suspended sediment yields of the Pra Basin was done to determine the extent of estimation of observed sediment yields. The prediction of suspended sediment yield was do...

Sediment Distribution of the River Boundary Layer DOI:  https://doi.org/10.30564/jgr.v3i1.1844 Abstract The movement of particles on the river boundary layer is a complexphenomena which can be never solved by a deterministic approach. Theunsteady non uniform conditions in flow boundary layer show the result ofwater surface and bed stream changing with time and location of particles.To determine the movement of boundary layer particles other new theoriesabout stochastic processes using the theory of probability and statistics inriver alluvial channels will give better results. Keywords:  Sediment transport, Unsteady, Stochastic, Stream

Empirical Studies in Alluvial Streams DOI:  https://doi.org/10.30564/jgr.v3i1.1668 Abstract Meander flow takes place in one single channel which oscillates more orless regularly with amplitudes that tend to increase with time. Meandersare found in beds of fine sediments with gentle slopes. In this study, effortwill be made to investigate meanders’ turbulent boundary layer and toimprove the present knowledge about the river meandering phenomena. Itis assumed that the development of the perturbations which develop intomeanders or braids, is longer than the width of the channel. Interaction between the flow and mobile boundaries produces channel patterns which areclassified as meandering or braided. It is therefore long compared with theripples or dunes which cover the bed of such a channel and whose wavelength is shorter than the width of the channel. The variation of resistance toflow and rate of transport of bed material with velocity are discussed brieflyand taken into account. Me...

Discussion at Maximum Sediment Discharge Theory DOI:  https://doi.org/10.30564/jgr.v3i1.1572 Abstract It is observed the gravel river sediment discharge with existing empiricalregime relationships. The aim of the research is to give a mathematicalmodel about the stable cross-section geometry and to determine a modelfor the stable slope of an alluvial channel which is in nature seldom stable.In an alluvial channel to reach an equilibrium condition, it changes its planegeometry until to have a stable condition in plane configuration. There arethree different parameters in plan configuration about river behavior: width,depth and slope. Keywords:  Sediment transport, Mathematical model, Empirical regime relationship

Evaluation of Sediment Yield Predicting Models of Ghana DOI:  https://doi.org/10.30564/jgr.v4i1.2596 Abstract Fluvial sediment transport data is a very important data for effective water resource management. However, acquiring this data is expensive and tedious hence sediment yield modeling has become an alternative approach in estimating river sediment yields. In Ghana, several sediment yield predicting models have been developed to estimate the sediment yields of ungauged rivers including the Pra River Basin. In this paper, 10 months sediment yield data of the Pra River Basin was used to evaluate the existing sediment yield predicting models of Ghana. A regression analysis between predicted sediment yield data derived from the models and the observed suspended sediment yields of the Pra Basin was done to determine the extent of estimation of observed sediment yields. The prediction of suspended sediment yield was do...

Sediment Distribution of the River Boundary Layer DOI:  https://doi.org/10.30564/jgr.v3i1.1844 Abstract The movement of particles on the river boundary layer is a complexphenomena which can be never solved by a deterministic approach. Theunsteady non uniform conditions in flow boundary layer show the result ofwater surface and bed stream changing with time and location of particles.To determine the movement of boundary layer particles other new theoriesabout stochastic processes using the theory of probability and statistics inriver alluvial channels will give better results. Keywords Sediment transport;Unsteady;Stochastic;Stream Full Text: PDF

Empirical Studies in Alluvial Streams DOI:  https://doi.org/10.30564/jgr.v3i1.1668 Abstract Meander flow takes place in one single channel which oscillates more orless regularly with amplitudes that tend to increase with time. Meandersare found in beds of fine sediments with gentle slopes. In this study, effortwill be made to investigate meanders’ turbulent boundary layer and toimprove the present knowledge about the river meandering phenomena. Itis assumed that the development of the perturbations which develop intomeanders or braids, is longer than the width of the channel. Interaction between the flow and mobile boundaries produces channel patterns which areclassified as meandering or braided. It is therefore long compared with theripples or dunes which cover the bed of such a channel and whose wavelength is shorter than the width of the channel. The variation of resistance toflow and rate of transport of bed material with velocity are discussed brieflyand taken into account. Me...

Discussion at Maximum Sediment Discharge Theory DOI:  https://doi.org/10.30564/jgr.v3i1.1572 Abstract It is observed the gravel river sediment discharge with existing empiricalregime relationships. The aim of the research is to give a mathematicalmodel about the stable cross-section geometry and to determine a modelfor the stable slope of an alluvial channel which is in nature seldom stable.In an alluvial channel to reach an equilibrium condition, it changes its planegeometry until to have a stable condition in plane configuration. There arethree different parameters in plan configuration about river behavior: width,depth and slope. Keywords Sediment transport; Mathematical model; Empirical regime relationship Full Text: PDF

Evaluation of Sediment Yield Predicting Models of Ghana Abstract Fluvial sediment transport data is a very important data for effective water resource management. However, acquiring this data is expensive and tedious hence sediment yield modeling has become an alternative approach in estimating river sediment yields. In Ghana, several sediment yield predicting models have been developed to estimate the sediment yields of ungauged rivers including the Pra River Basin. In this paper, 10 months sediment yield data of the Pra River Basin was used to evaluate the existing sediment yield predicting models of Ghana. A regression analysis between predicted sediment yield data derived from the models and the observed suspended sediment yields of the Pra Basin was done to determine the extent of estimation of observed sediment yields. The prediction of suspended sediment yield was done for 4 out of 5 existing sediment yield pre...