Fig. 2.

Relation between settling velocity and diameter for particles ranging from fine (D < 0.1 mm) to very coarse (D > 1 mm). For the Ferguson-Church relation (blue lines) we used three pairs of C₁/C₂ parameters and for Stokes law (yellow line) C₁ = 18. The red dots represent the settling velocity value for D = 0.1 mm and D = 0.5 mm adopting the C₁/C₂ pair as intermediate relation for grains of varied shape (18/1.0). Modified from Ferguson and Church [63]. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)