The phrase "ancient waterways" is correct and usable in written English.
It can be used when referring to historical or old systems of water transport, such as rivers, canals, or other bodies of water that were significant in the past.
Example: "The archaeologists discovered remnants of ancient waterways that once facilitated trade between distant civilizations."
Alternatives: "historic rivers" or "old water routes".
Today, the most obvious signs that Mars was once a wet world are the ancient waterways that sculpted the planet's surface many millions of years ago.
Ultimately, the fossils found on Earth could help those looking for the building blocks of life on Mars, where Nasa's Curiosity rover has recently found evidence for ancient waterways.
Most of these ancient waterways would have flowed from the cratered highlands of the southern hemisphere to the low plains of the north even without the massive lava fields, the study concluded.
As Old Town Lijiang's ancient waterways became contaminated with sewage, and its cobbled streets transformed into a red light district of bawdy nightlife, much of the indigenous Naxi population began to flee the town.
When the local leaders weren't interested she moved on to something bigger: uncovering, literally, Cape Town's ancient waterways.
This ancient waterway was first constructed as early as the 4th century bce, was rebuilt in 607 ce, and has been used ever since.
The modern Guadalquivir has been diverted around the city, leaving the ancient waterway separating the city center from Triana as only a wide, currentless ditch.
If a corporation has rights, the authors argue, so, too, should an ancient waterway that has sustained human life for as long as it has existed in the Western United States.
Overseers of the eastern route, which is being built alongside an ancient waterway for barges called the Grand Canal, have found that the drinking water to be brought to Tianjin from the Yangtze is so polluted that 426 sewage treatment plants have to be built; water pollution control on the route takes up 44 percent of the $5 billion investment, according to Xinhua, the official news agency.
It followed the line of the Wellstream, another ancient waterway.
European lake whitefish (in the following denoted the Coregonus lavaretus complex, as this group of fishes involves several taxonomic controversies) shows a similar distribution pattern, although it spread further via ancient waterway connections into the Limfjord in northern Jutland and further to a few rivers, including the Gudenaa River on the Jutland East coast [ 24] (see Fig. 1).
