Physics · Hydrology
The value of the φ-index (phi-index) for any drainage basin area represents:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A constant infiltration capacity rate that separates direct runoff from infiltration for a particular storm✓
- 2The cumulative depth of total rainfall over a basin
- 3The total depth of accumulated runoff at a basin outlet
- 4A factor that separates the total value of annual rainfall and annual runoff
Correct answer
A constant infiltration capacity rate that separates direct runoff from infiltration for a particular storm
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