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← GeographyWhich mechanism maintains channel stability in alluvial river floodplains?
A)Vegetation roots resisting bank erosion✓
B)Ice crystal formation preventing widening
C)Turbidity currents accelerating abrasion
D)Increased bedload transport rate reducing sinuosity
💡 Explanation
Lateral channel migration can deposit sediment in floodplain soils; however, biostabilization via root cohesion can counteract fluvial erosion. Thus, vegetation stabilizes the banks because shear stress reduction is lower, therefore resisting lateral flow better than other purely hydrodynamical effects.
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