Modélisation mathématique du transport de sédiments dans un écoulement fluvial

Abstract

In this thesis, the sediment transport in the case of steady open channel flow is studied. The mai objectives were first the study of bed-load transport ans sediment concentration distribution in the bottom zone, the the study of suspended-load. A method wich enables to select an adapted bed-load formula is proposed. This method is based on the computation of the dimesionless variables and functions of the two phase phenomenon. Data experiments of Meyer-Peter have been used for calibration. A verification analysis using data according to Guy et al., Magdy et al. And Satya et al. Shows a satisfactory results. The determination of the concentration distribution in the bottom zone and especially the reference concentration Ca is proposed. An analytical solution of Schmidt’s equation in a genral for mis presented. After simplification, a model for the computation of the suspended transport of sediments is developed and is tested by data according to MISSISSIPPI river. A new approch is used in order to compute the total-load rate. Finally, all results are compiled in a general code "ANASED" (SEDIMENTATION ANALYSIS).