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← GeographyWhich risk increases when sediment supply outpaces removal in alluvial fan deposits?
A)Increased channel avulsion frequency✓
B)Decreased groundwater infiltration rates
C)Enhanced pedogenesis in distal regions
D)Diminished debris flow initiation likelihood
💡 Explanation
Channel avulsion becomes rife because rapid sedimentation overwhelms channel capacity, causing **aggradation**, which directs flow elsewhere rather than maintaining its current path. Therefore, frequent shifts occur; contrasting decreased infiltration happens at fine-grained deposition.
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