I still don’t know if the Pelusiac Nile ran along there and when it went “extinct.” There is so little in English to go on, and IMO a lot of the physical history is lost forever due to the Suez Canal construction and all that followed.
In my off hours I dial up (anachronism) the YouTube app on Roku and binge-watch episodes of Time Team. The amount of construction that just piffed out of existence in Britain alone during Roman times (and that's just the tip o' the iceberg) astonishes me. They built numerous huge structures (including canals, aqueducts, roads, ports, arenas, whole cities) in very short timeframes, and some of them just look like they weren't in use for long (although they probably saw at least as much use as anything being built right now will see by the time they're torn down).