| Similarly, soils that are permeable tend to facilitate subsurface flow including interflow and throughflow, rather than surface run-off. |
| A drainage basin is the topographic region from which a stream receives runoff, throughflow, and groundwater flow. |
| Throughflow occurs when there are significant changes in the density of different layers within the soil horizon. |
| Local businessman, Ken McPherson, said there was a good level of activity in the town with a large increase in the throughflow of people. |
