A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Alluvial Streambed Degradation
The effect of man's activities on an alluvial river are investigated in this research. Specifically, streambed adjustments downstream of a dam constructed on a wide alluvial river. The experimental results show that both scour and fill occur in the river bed downstream of the dam as the result of an alluvial bar moving through the system. The bar originates from the local scour hole just downstream of the outlet structure. The channel becomes choked on one side by the bar, while scour occurs on the opposite side of the channel. A numerical model using the streamtube approach is developed to enable prediction of both scour and fill in the same river cross section. The numerical model is tested for sensitivity to the upstream boundary condition, the sediment porosity, the sediment transport relation, and the numerical time step.
Alluvial Streambed Degradation
The effect of man's activities on an alluvial river are investigated in this research. Specifically, streambed adjustments downstream of a dam constructed on a wide alluvial river. The experimental results show that both scour and fill occur in the river bed downstream of the dam as the result of an alluvial bar moving through the system. The bar originates from the local scour hole just downstream of the outlet structure. The channel becomes choked on one side by the bar, while scour occurs on the opposite side of the channel. A numerical model using the streamtube approach is developed to enable prediction of both scour and fill in the same river cross section. The numerical model is tested for sensitivity to the upstream boundary condition, the sediment porosity, the sediment transport relation, and the numerical time step.
Alluvial Streambed Degradation
T. W. Sturm (author) / D. M. Skolds (author)
1986
98 pages
Report
No indication
English
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