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Which effect accelerates sediment sorting in alluvial fans?

A)Increased flow competent Reynolds number
B)Reduced sediment threshold shear stress
C)Enhanced laminar boundary layer adhesion
D)Kinematic viscosity buoyant equilibrium boost

💡 Explanation

Shear stress on sediment depends upon flow regime as described by Reynolds number; segregation increases because higher Reynolds numbers give greater local turbulent fluctuations and entrainment, eroding lower fractions, therefore increases sorting, rather than boundary effects.

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