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The portion of water intercepted by vegetation canopy that flows down the tree trunks to the ground is called?

Answer and explanation

Correct answer: Stemflow

Answer: B, stemflow. A canopy intercepts some rainfall on leaves and branches. Part of this water drips through gaps in the canopy as throughfall, while another part travels along twigs and branches and then flows down the trunk. That trunk-directed pathway is called stemflow and delivers water near the tree base. A is incorrect because throughfall is water that passes through or drips from the canopy, not water specifically moving along the trunk. C is incorrect because infiltration begins when water enters the soil. D is incorrect because virga is precipitation that evaporates before reaching the ground. Memory cue: “stemflow follows the stem”; throughfall falls through the canopy.

Related tags

StemflowThroughfallForest-HydrologyHydrological CycleThe Living WorldBiologyClass 11 Mcq

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