Cellular automata models of particle interactions in sediment entrainment
The geometry of a river bed surface is determined by the arrangement and size of the particles that form the bed. In gravel-to-boulder bed rivers, the surface geometry around any individual particle may be complex and highly variable, and tends to include multi-particle structures. These textural and structural characteristics influence whether an individual particle is entrained. The effect on entrainment is generally described as particle hiding and protrusion, which together define the degree to which an individual particle is sheltered by surrounding particles. Two variants of a cellular ...
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Brown, Nancy E.; Ramírez, Jorge A.; Whol, Ellen E.