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The water discharged through streams consisting wholly or in part of water contributed by overland flow and groundwater flow is called :

  • A.Precipitation
  • B.Runoff
  • C.Transpiration
  • D.Evaporation

Answer: B

This water is called Runoff.

Runoff (stream flow) is the water that reaches and is discharged by streams. It is made up of surface or overland flow, interflow through the soil, and baseflow from groundwater, which keeps streams flowing between rains.

Precipitation is the water falling from the atmosphere, transpiration is water released by plants through their leaves, and evaporation is the change of surface water to vapour. These supply or remove water but are not the water discharged through streams.

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