SIMULATION OF SEDIMENT TRANSPORT AND ARMOURING / Simulation des transports solides et de l'armure du lit

Abstract

Abstract A realistic sediment transport simulation model must incorporate an unsteady, non-uniform flow computation component, a means of simulating bed load and suspended sediment transport and their interactions, and bed armouring and elevation accounting routines. A model embodying these components has been developed for upland streams with tributaries. The streams are assumed to have a wash load, sand or gravel beds, and erosion resistant banks. After calibration of the model using 15 days of data collected during the spring of 1975 from sections of the East Fork River in Wyoming and its tributary Muddy Creek, a standard error of prediction of 50 per cent of the average observed bed load discharge of 3.43 lb/s (1.55 kg/s) was obtained. The total bed load outflow for the simulation period was 20 per cent greater than that obtained from bed load discharge measurements and 94 per cent greater than a rough estimate of volumetric change obtained from observations of bed elevations. A fortunate characterist...