Across
- 6. stream that only flows after rainfall
- 8. 11th longest river in US, makes a boarder
- 9. a shorter river that flows into another river in this list
- 11. stream that flows some times out of the year
- 12. process of settling or being deposited as sediment
- 13. an indirect source of pollution from lots of different sources
- 15. portion of land drained by a river
Down
- 1. where a river or stream begins
- 2. a direct source of pollution
- 3. area of land that drains to a particular point
- 4. an 8-digit code system known as a Hydrologic Unit Code
- 5. a lake with a powerplant
- 7. process of moving rock or sediment to different locations
- 10. stream that has constant flow all year
- 14. river that flows into a bigger body of water