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Geography

Which consequence results when exceeding alluvial riverbank porosity limits?

A)Lateral channel migration increases rapidly
B)Sediment deposition velocity plateaus
C)Baseflow contribution to recharge decreases
D)Geomorphic equilibrium becomes stable

💡 Explanation

Increased saturation leads to bank instability and collapse; therefore, increased lateral migration occurs because excess porewater pressure reduces the effective shear strength, rather than leading deposition plateaus under stable or equilibrium conditions.

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