groundwater depletion curve

groundwater depletion curve

[′grau̇nd‚wȯd·ər di′plē·shən ‚kərv] (hydrology) 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.