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Q: The part of the runoff that enters the stream immediately after the rainfall is called direct runoff. The total direct runoff is the sum of ___________.
  • A. surface runoff, infiltration and evapotranspiration
  • B. surface runoff, prompt interflow and channel precipitation
  • C. overland flow and infiltration
  • D. rainfalls
Correct Answer: Option B - • The part of the runoff that enters the stream immediately after the rainfall is called direct runoff. • The total direct runoff is the sum of surface runoff, prompt interflow and channel precipitation. • It is sometimes termed as direct storm runoff or storm runoff.
B. • The part of the runoff that enters the stream immediately after the rainfall is called direct runoff. • The total direct runoff is the sum of surface runoff, prompt interflow and channel precipitation. • It is sometimes termed as direct storm runoff or storm runoff.

Explanations:

• The part of the runoff that enters the stream immediately after the rainfall is called direct runoff. • The total direct runoff is the sum of surface runoff, prompt interflow and channel precipitation. • It is sometimes termed as direct storm runoff or storm runoff.