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← GeographyWhich outcome arises when glacial meltwater outflow diminishes downstream within an alluvial fan?
A)Increased braided river channelization
B)Elevated proximal sediment deposition
C)Diminished distal stream incision✓
D)Reduced fan-head sediment bypass
💡 Explanation
Less meltwater reduces the stream's capacity; reduced stream power causes reduced capacity for erosion and sediment transport via hydraulic action. Therefore, distal stream incision decreases rather than increasing, because lowered flow cannot sustain original channel depths.
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