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← GeographyWhich outcome occurs when lahar flow encounters braided river?
A)Channel avulsion and widespread deposition✓
B)Rapid decrease in flow turbulence
C)Lahar velocity achieves laminar profile
D)Dissolved sediment flocculates immediately
💡 Explanation
Channel avulsion and widespread deposition occur because the braided river's multiple shallow channels cannot contain the lahar flow, triggering channel avulsion. This causes deposition due to energy dispersion, rather than confined erosion, therefore spreading debris over floodplain.
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