My understanding is the flow from the Blue Nile has been a little weak for years now and, of course, the Aswan Dam is preventing the large downstream floods. Ethiopia and the Sudan are pumping some water but I doubt it's sufficient yet to have a large impact. Since so much of the water in the Nile comes from this source it's not surprising if levels are decreasing. Above the Blue Nile the river to my knowledge carries as much water as in the recent geologic past. Before about 10,000 years ago it also carried all the water from Lake Kivu and its catchment area but mountains arose and cut off this flow. Today there are numerous CO2 vents in these mountains and Lake Kivu itself is carbonated and contains high levels of methane and hydrogen sulphide. The CO2 levels are dangerously high and threaten the millions who live around the lake. It can come out of solution explosively like soda pop from a shaken can if levels reach too high a level. Effectively it becomes a cascade event just like a CO2 geyser and the the CO2 suffocates people at elevations below the air level.
Sometimes even "tiptoeing" just isn't enough.
>"But the presence of water at sufficient elevation is not proof or evidence it was used to build pyramids. "
Well yes you are correct. Though you can say that about carbonated water, and the like. How are you going to prove all that... The water behind the Pyramids only makes it a possibility. Unless they do ground radar and purposely go looking for a canal, it will always be nothing more than a possibility. And, we both know that will not happen any time soon.
The Comment about the Nile was not originally mine. It was from a report. One in which, I can not site, though I did in the past.
Like nearly everyone in the Country, I am on lock down. With all this time on my hands, I decided to do a book. It's not that hard. Search for BookWright (Blurb). Amazon is apart of it. Not sure how long this will last. So, I have turned my attention to ROPE, once again. A Study in Rope, with all the calcs. And again, a preponderance in truth, hopefully. :)