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Geography

Which outcome is accelerated within deeply incised alluvial valleys?

A)Thalweg migration increase
B)Ephemeral stream stabilization
C)Braided channel formation
D)Floodplain sediment accretion

💡 Explanation

Thalweg migration increases due to focused flow intensification and bank erosion, therefore destabilizing valley walls because downcutting reduces lateral support, rather than encouraging deposition normally associated with lower gradient alluvial spreading of flow.

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