Abstract
A modeling framework is presented as the basis for developing numerical models of sediment processes on upland watersheds. Sediment processes are described in terms of both broad shallow flow areas and concentrated flow systems. Basic assumptions and governing equations are presented for broad shallow flow and concentrated flow sediment processes. The effects of space and time averaging on the predictive equations are described. Starting from the most general one-dimensional, unsteady model, simpler model structures are obtained and the successive simplifications made on the governing equations to obtain simpler and less detailed formulations are described. Although progress has been made in modeling sediment processes on upland watersheds, the development of improved modeling approaches must be based on a better understanding of runoff mechanisms and the mechanics of sediment generation, transport, and deposition occurring over a range of catchments scales and environmental conditions. Future research must address the development of boundary conditions, model components, the scales over which the governing equations are valid, and integration of the equations in space and time.
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Lopes, V.L., Ffolliott, P.F. (1996). A Framework for Modeling Sediment Processes in Upland Watersheds. In: Singh, V.P., Kumar, B. (eds) Water-Quality Hydrology . Water Science and Technology Library, vol 16. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0393-0_7
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DOI: https://doi.org/10.1007/978-94-011-0393-0_7
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