Image analysis has been increasingly used for the measurement of river flows due to its capabilities to furnish detailed quantitative depictions at a relatively low cost. This manuscript describes an application of particle tracking velocimetry (PTV) to a bed-load experiment with lightweight sediment. The key characteristics of the investigated sediment transport conditions were the presence of...

The relation between the equivalent roughness and different grain size percentiles of the sediment in gravel-bed rivers was determined under the hypothesis that the vertical distribution of the flow velocity follows a logarithmic law. A set of 954 data points was selected from rivers with gravel size sediment or larger, with a non-sinuous alignment and free of vegetation or obstacles. According...

One of the significant problems facing water resource engineer is calculating coefficient roughness for subsequent design calculations discharge amount a channel or river. In this study, experiments were conducted in semi-circular, straight to investigate factors affecting bed and flow using Artificial Neural Network (ANN). For purpose, three semi-circular models with free overfall constructed ...