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← GeographyWhich process controls the morphology of braided streams carrying significant alluvial sediment loads?
A)Aggradation exceeds lateral channel migration✓
B)Erosion balances sediment deposition rates
C)Channel incision prevents floodplain formation
D)Vegetation stabilizes bar and bank structures
💡 Explanation
When braided streams carry high alluvial sediment loads, aggradation rate outpaces lateral channel migration capacity, forcing the stream to deposit sediment rapidly. Therefore, aggradation exceeding migration controls morphology, as opposed to alternatives where erosion is balanced or channel incision/vegetation are dominant factors.
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