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Which flow regime precipitates increased erosion rates in riverbeds?

A)Reynold's number entering turbulent regions
B)Laminar flow exhibiting boundary separation
C)Froude number exceeding critical value
D)Subcritical flow approaching tranquil conditions

💡 Explanation

Bed erosion escalates with high Reynold's number because the increased kinetic power drives greater shear stress via turbulent momentum transfer, leading to particle dislodgement and transport; therefore, turbulence, and not alternative flow regimes, amplify basal scour rates.

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