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← GeographyWhich consequence results when river discharge overwhelms levee stability?
A)Increased oxbow lake cut-off frequency✓
B)Accelerated floodplain sedimentation rates
C)Widespread hypoxic zone formation
D)Decreased aquifer groundwater recharge
💡 Explanation
Increased river discharge that overtops a levee increases flow through meander bends, leading to higher erosion rates and shorter pathways that trigger stream avulsion, therefore more frequent oxbow generation occurs, rather than increased groundwater recharge because levee breaches induce surface runoff.
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