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← GeographyWhich outcome occurs when rapid sediment deposition overwhelms levee reinforcement?
A)Increased channel avulsion frequency✓
B)Accelerated delta subsidence rates
C)Enhanced floodplain soil fertility
D)Decreased river sinuosity index
💡 Explanation
Increased channel avulsion frequency occurs due to sedimentary overloading; because the increased sediment load outpaces the levee's capacity leading to the stream overflowing and cutting a new course. Therefore, avulsion is more frequent, rather than the other options, which describe different fluvial processes.
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