Three-dimensional inter-basin groundwater flow toward a groundwater-fed stream: Identification, partition, and quantification

•3D pathways of IGF are identified with an assessment on flow rates.•IGF contributes 36%∼59% to the baseflow and 32%∼52% to the streamflow in the studied river.•Infiltration recharge and aquifer properties affect the development of IGF. Inter-basin groundwater flow (IGF), defined as groundwater flow...

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