These canals no longer exist.
An irrigation canal exists on both sides of village, but normally it is dry, so crops depend mainly on rain.
An irrigation canal exists but has not held water since 1996.
The canal still exists even it has lost the past glory.
Some take this to mean that the canal did not exist before Henry's construction work.
The canal that linked the artificial lake with the Nile still exists; it is called Bahr Yousef - the sea-waterway of Joseph.
The canals of 1900 had existed for over 100 years and during this time had changed but little.
Before the canal existed, Waikiki consisted of wetlands which were fed by streams running from the Makiki, Palolo, and Manoa valleys to the sea.
The canal no longer exists, but was located at what is now Central Parkway.
It was in 1964 that Mariner 4 took the first pictures of Mars and that pretty much gave away the fact the canals didn't exist.