Note 066
The Royal Canal (Nahar-Malcha) might be successively restored, altered, divided, etc. (Cellarius, Geograph. Antiq. tom. ii. p. 453): and these changes may serve to explain the seeming contradictions of antiquity. In the time of Julian it must have fallen into the Euphrates below Ctesiphon.
The History Of The Decline and Fall Of The Roman Empire Chapter 24