Search results for "bed variation"

Temporal Evolution of Scour downstream bed sills

2007

Empirical estimation of maximum scour depth downstream bed sills

2009

Numerical simulation of river-bed variations: Sensitivity analyses with respect of the initial hydraulic roughness

2020

Two elements affect the efficacy of the numerical models of mobile-bed evolution: the prediction of the hydraulic roughness, related with both sediment distribution on the bed and flow depth, and the prediction of the hydraulic sorting, when the distribution of sediments on the bed is not uniform. In this work the bed profile variation is simulated, by using a numerical model proposed in previous works, in function of the variation of the friction factor, that reflects the coarsening of median sediment diameter, due to armouring process, and the variation of flow conditions. The variation of grains-size distribution of the bed material is predicted by using a probabilistic approach and the …