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← GeographyWhich effect accelerates oxbow lake formation as a fluvial meander migrates laterally?
A)Increased bank erosion on outer bend✓
B)Decreased sediment deposition rates
C)Reduced channel sinuousity gradient
D)Enhanced vegetation stabilization effect
💡 Explanation
When a meander migrates, increased bank erosion on the outer bend occurs because water velocity and shear stress concentrate there, further undercutting the bank and widening the bend thus accelerating cutoff. Increased erosion results, rather than decreasing deposition or stabilization, which would slow oxbow formation.
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