I am working on it. I downloaded Photoshop, and am considering a terrain plugin. It's appears they want to charge me each month. I will be only using it 1 time.
I am not infallible... though I hope this next colored 3D topo will be revealing. It should lend more credit to the water source, or it will may negate it.
Yes, there are aquifers under Giza. This is well known. Give me a little time, and let's see what I come up with.