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← GeographyWhich outcome is most accelerated by increased sediment load into an alluvial fan system?
A)Channel avulsion frequency✓
B)Soil horizon development
C)Weathering rate of fan sediments
D)Groundwater infiltration rate
💡 Explanation
When sediment load increases drastically in an alluvial fan, aggradation occurs influencing stream power, because channel incision is reduced as sediment accumulates, promoting frequent shifts in the active channel across of the fan surface. Therefore channel avulsion increases, rather than soil, weathering, or infiltration which occur over geological timescales or through seperate mechanisms.
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