interflow (throughflow) The lateral movement of water through the upper soil horizons, normally during or following significant precipitation events. Shallow groundwater or interflow may emerge at the surface at the bottom of slopes and flow across the ground surface for a time. This is known as ‘return flow’.

interflow(throughflow) The lateral movement of water through the upper soil horizons, most commonly during or following significant precipitation. If the interflow is shallow it may emerge at and flow for some time across the surface at the bottom of slopes (when it is known as ‘return flow’).

interflow (throughflow) The lateral movement of water through the upper soil horizons, most commonly during or following significant precipitation. If the interflow is shallow it may emerge at and flow for some time across the surface at the bottom of slopes (when it is known as ‘return flow’).