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← GeographyWhich outcome occurs during intense rainfall on graded alluvial fans?
A)Increased stream incision and terrace formation
B)Development of distributary channel networks✓
C)Formation of V-shaped valleys within channels
D)Extensive chemical weathering of deposited sediment
💡 Explanation
Distributary channel networks form through avulsion; alluvial fan gradients cause flow to diverge, because increased sediment load overtops channels, inducing channel migrations. Therefore, braided stream patterns result rather than concentrated flow carving deeper valleys.
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