Swanson, F. J.; Swanston, D. N.; Dyrness, C. T.; Cromack, K.; Fredriksen, R. L.; Moore, D. G.; Glenn, L. F. 1973. A conceptual model of soil mass movement, surface soil erosion, and stream channel erosion processes: erosion modeling group. Seattle: University of Washington; Coniferous For. Biome Internal Rep. 72. 20 p.
The conceptual framework of an erosion model has been designed to linkprocesses of mass wasting, surface erosion, and channel storage andtransport. A program to stimulate mass wasting will be based on avariation of the factor of safety approach which balances forces tendingto drive mass movement against those resisting it. Surface erosion willbe treated by using a form of the universal soil loss equation adapted toaccount for dry ravel processes as well as precipitation generated surfaceerosion. These processes move material eroded from hillslope landscapeareas into the stream channel. Channel erosion may occur either asbedload and suspension load transport or in episodic debris torrents,triggered by debris dam failure or by mass movement from a hillslope.
The model will be driven primarily by hydrologic processes and will alsoreceive key inputs from vegetation components of the general ecosystemmodel. Model development will aim at producing a computer model whichwill have sufficient realism and predictive capability to be useful toland managers.
INTRODUCTION