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← GeographyWhich mechanism increases stream discharge during intense orographic precipitation events?
A)Antecedent soil moisture saturation✓
B)Enhanced evapotranspiration from vegetation
C)Increased groundwater recharge rates
D)Reduced surface detention capacity
💡 Explanation
When orographic precipitation occurs over saturated soils, infiltration-excess overland flow occurs because the rainfall intensity exceeds the soil's infiltration capacity, dramatically increasing stream discharge. Therefore antecedent soil moisture saturation is most influential rather than evapotranspiration, groundwater recharge, or detention limitations which operate at slower rates.
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