groundwater depletion curve

A recession curve of streamflow, so adjusted that the slope of the curve represents the runoff (depletion rate) of the groundwater; it is formed by the observed hydrograph during prolonged periods of no precipitation. Also known as groundwater recession.

Related terms:

• groundwater recession
• recession curve
• Rating Curve
• groundwater flow
• tide curve
• saturation curve
• sedimentation curve
• groundwater decrement
• basal groundwater
• groundwater discharge