gen-define-baseflow-versus-stormflow-and-give-one-short-worked-e-e4b4

Define baseflow versus stormflow and give one short worked example.

# Baseflow vs Stormflow ## Definitions **Baseflow**: The portion of streamflow that comes from groundwater discharge and other delayed sources. It's the sustained, slow-release component that keeps streams flowing between rain events. **Stormflow** (or quickflow): The portion of streamflow that responds rapidly to precipitation events, including surface runoff and rapid subsurface flow. It causes the sharp peaks in stream discharge during and shortly after storms. ## Worked Example A stream gauge records the following discharge data: - **Before storm**: 2.5 m³/s (steady baseflow) - **Peak during storm**: 18.0 m³/s (total discharge) - **Two days after storm**: 3.0 m³/s (baseflow recovering) **Analysis:** - **Baseflow during peak**: ~2.8 m³/s (interpolated between before/after values) - **Stormflow at peak**: 18.0 - 2.8 = **15.2 m³/s** This means that at the peak of the storm, about 84% of the flow was stormflow (rapid response) and only 16% was baseflow (groundwater contribution). --- *Note: Baseflow is often estimated using hydrograph separation techniques, such as the straight-line method or recession curve analysis.*