The phrase "ancient canals" is correct and usable in written English.
It can be used when referring to waterways that were constructed in ancient times, often in historical or archaeological contexts.
Example: "The archaeologists discovered remnants of ancient canals that once facilitated trade in the region."
Alternatives: "historic waterways" or "old aqueducts".
The first is Xochimilco, a network of ancient canals and gardens at the city's southern edge, easily reached by subway or taxi.
What does inspire me are Chesley Bonestell's paintings of unimaginably ancient canals, still greening the martian desert, their Ozymandian builders otherwise long forgotten (Fig. 3).
A report by The Associated Press in the National Briefing column on June 7 about the discovery of ancient canals in Florida referred incorrectly to their significance.
As a finance official in this town of ancient canals and textile factories, he got to hand out shopping vouchers worth nearly $30 apiece to 20 elderly residents.
Sightseeing The visitor's imagination is first captured by the ancient canals that wind their way through the old city, opening up unexpected vistas of Gothic spires, canalside houses and humpbacked medieval stone bridges.
Correction: June 17 , 2002 Monday A report by The Associated Press in the National Briefing column on June 7 about the discovery of ancient canals in Florida referred incorrectly to their significance.
Napoleon personally investigated the remains of the ancient canal.
A 1969 CORONA spy satellite view of an ancient canal north of Nineveh (modern Iraq).
In some areas, the tells of ancient towns remain above the alluvium and allow a reconstruction of the ancient canal patterns.
Conduction of water through ditches from streams was practiced widely in Southwest Asia, in Africa, and in the Americas, where ancient canal systems can be seen.
This paper describes the use of satellite remote sensing data to uncover an ancient canal-based tuntian system located in an oasis agricultural landscape adjacent to the ancient Kingdom of Loulan at the southern margin of the Tarim Basin.
