Characterizing incipient motion of low fines content soils with varying compositions, water contents, and relative densities

Laboratory flume experiments were conducted to quantify the effects of soil characteristics on critical shear stress low fines content samples collected from Montauk shores in New York. The soils reconstituted at five different contents, ranging between 0 and 20%. These mixtures composed two initial water dry optimum moistures, relative densities, one moderate dense other dense. strength indices soils, including effective cohesion angle internal friction, measured using consolidated undrained (CU) triaxial test. initiation erosion tests was under a unidirectional steady current condition. near-bed flow velocity, onset erosion, used determine velocity for each sample. results indicate that increases with cohesion. contents demonstrate higher resistance than those optimum. density appears overshadow such denser remains relatively insensitive composition. compacted show highest against erosion. Shields parameter is modified include content, density, content.