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← GeographyWhich outcome occurs when a stream's sediment load significantly increases following heavy deforestation?
A)Increased floodplain nutrient deposition
B)Enhanced stream channel downcutting
C)Reduced flow velocities downstream✓
D)Accelerated formation of oxbow lakes
💡 Explanation
Reduced flow velocities result because massively increased sediment leads to channel aggradation; this exceeds the stream's transport capacity, a process known as stream loading, which reduces flow effectiveness; therefore less flow rather than increased downcutting downstream.
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