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← GeographyWhich adjustment occurs when alluvial river gradients decrease?
A)Increased sinuosity and meander formation✓
B)Elevated flow velocity and channel incision
C)Reduced sediment deposition in floodplains
D)Diminished channel width and depth ratios
💡 Explanation
Decreased gradient causes reduced stream power; therefore, increased friction results in increased sinuosity, forming meanders rather than downcutting, because sediment deposition becomes dominant and leads to lateral channel migration via channel avulsion.
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