अपवाह का वह भाग जो भूमि के अन्दर चला गया हो तथा सन्तृप्त क्षेत्र में प्रवेश कर गया हो तथा बाद में किसी जल स्त्रोत में निस्सरित हो जाए।
That part of the runoff which consists of water that has passed into the earth and has entered the zone of saturation and has later been discharged into a water body.
That part of the runoff which consists of water that has passed into the earth and has entered the zone of saturation and has later been discharged into a water body.
