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← GeographyWhich feedback results downstream after artificial levee construction?
A)Increased bank erosion downstream✓
B)Decreased overall channel sinuosity
C)Reduced floodplain sedimentation rates
D)Diminished longitudinal stream flow
💡 Explanation
Increased flow velocity downstream causes aggressive bank erosion, where Lateral Migration has increased scour capability, because the levees confine flow. Therefore downstream erosion surpasses accretion rather than balanced levee-induced sedimentation, preventing meandering deceleration, or flow alterations.
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