Publications [#281174] of Peter K. Haff
- Raghuraman, J; Haff, PK, Scaling-up of small-scale granular sediment transport laws,
Proceedings of Engineering Mechanics, vol. 1
pp. 262-264, Fort Lauderdale, FL, USA
(last updated on 2019/05/21)
Practical applications of laboratory sediment transport studies include the attempt to predict erosion of soil on hillslopes subject to rainfall-induced runoff. Most scientific studies of the mechanics of sediment transport have been performed at laboratory-scale, or in limited reaches of streams where bed and flow conditions are relatively well-known. The study reported here examines the application of basic sediment transport laws to prediction of large-scale sediment fluxes on hillslopes where topographic details of the slope are unknown at scales below the cell-size of the simulation. In particular, the situation in which small channels or rills on the hillslope are not resolved is examined. It is shown that empirical power-law sediment transport rules may generate systematic errors in their prediction of erosion and deposition rates.
Granular materials;Mechanics;Computer simulation;Erosion;Runoff;Soils;Mathematical models;Channel flow;Sediments;Shear stress;