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← GeographyWhich outcome results when a meandering stream breaches its levee system during high discharge?
A)Avulsion creates a new channel✓
B)Entrainment increases sediment grade
C)Saltwater increases stream corrosion rates
D)Laminar accelerates base erosion rate
💡 Explanation
Avulsion occurs because high discharge overwhelms the stream's capacity, breaching the levee and causing the stream to seek a steeper, more direct path; therefore, a new channel forms rather than continued flow where the levee holds.
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