6. rivers running into the main one, that form part of the same drainage basin system
- Tributaries
- confluence
7. the movement of water with in the soil sideways, towards the river
- Throughflow
- Overland
8. The end of the river, where it meets the sea, or a lake
- Mouth
- Tributaries
9. The downward movement of water that seeps into the soil or a porous rock.
- Infiltration
- Condensation
10. The area of land drained by a river and its tributaries
- Drainage Basin
- Estuary
- Infiltration
