The base flow component of a stream hydrograph represents:
Choose the correct answer
Direct surface runoff
Subsurface (groundwater) contribution that sustains streamflow between storms
Peak flood discharge
Rainfall intensity
Correct Answer
B. Subsurface (groundwater) contribution that sustains streamflow between storms
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Stream hydrograph = direct runoff (from rainfall during and after storm) + base flow (groundwater contribution). Base flow is separated from total hydrograph before computing unit hydrograph. Methods: constant discharge, constant slope, and master depletion curve methods.
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