How were aqueducts made?

Related questions

1. Who owns the California Aqueduct?
2. Are there aqueducts in America?
3. Why is an arch stronger?
4. Why was Pont du Gard built?
5. How is an aqueduct built?
6. What is an arch explain?
7. Who built the Pont du Gard built?
8. Why were the aqueducts built?
9. What are the parts of an aqueduct?
10. What does the arch stand for?

Tags

1. #water
2. #pipes
3. #natural
4. #tunnels
5. #canals
6. #slope
7. #period
8. #years
9. #channel
10. #gravity
11. #bridges
12. #freshwater
13. #built
14. #source
15. #allowed
16. #spring
17. #about
18. #roman
19. #aqueducts
20. #systems
21. #aqueduct
22. #series