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← GeographyWhich outcome occurs when rapid sediment deposition constricts channel width?
A)Levee overtopping and flood plain expansion✓
B)Formation of lateral moraines and kames
C)Enhanced thermohaline circulation downwelling
D)Increased chemical weathering of plutons
💡 Explanation
Levee overtopping extends floodplains, because increased sediment deposition restricts the channel's capability. This causes flow depths and levee stress to grow via backwater effects at channel restrictions; therefore, overtopping occurs rather than continued channel downcutting.
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