What classifies a waterfall?

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Tags

1. #located
2. #plunging
3. #river
4. #annually
5. #creek
6. #falls
7. #amount
8. #provides
9. #stream
10. #significant
11. #water
12. #boulders
13. #waterfalls
14. #source
15. #segment
16. #cliff
17. #least
18. #flowing
19. #qualify
20. #generally
21. #accepted
22. #waterfall