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← GeographyWhich outcome results when excess sediment deposition narrows stream channels on floodplains?
A)Increased frequency of avulsion events✓
B)Decreased downstream sediment flux
C)Enhanced stream bank stabilization
D)Reduced groundwater recharge rates
💡 Explanation
Increased deposition reduces channel capacity, which triggers avulsion events through channel abandonment because reduced flow efficiency causes streams to seek steeper, more direct routes. Therefore, avulsion increases, rather than decreased flux, enhanced stability or reduce groundwater recharge events.
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