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← GeographyWhich risk increases as coalescing alluvial fans block canyon outlets?
A)Increased incidence of playa formation✓
B)Decreased regional seismic activity
C)Enhanced groundwater recharge rates
D)Accelerated rates of desert pavement
💡 Explanation
Increased playa formation occurs because a dammed lake creates a saline evaporating surface; this mechanism results in the precipitation of minerals. Therefore a playa develops, rather than other hydrological processes due to drainage obstructions.
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