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Geography

Which mechanism generates stable, slow-moving 'laminar' flow in a meandering stream channel?

A)High Reynolds number suppressing turbulence
B)Boundary layer separation causing vortices
C)Channel sinuosity inducing helical flow
D)Bed roughness dissipating kinetic energy

💡 Explanation

When stream bed roughness increases, energy dissipation increases because friction losses dominate at the granular scale limiting vertical mixing. Therefore kinetic energy dissipation results, rather than high turbulence, vortices, or helical flow, requiring different geometric and flow regimes.

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