One major obstacle in your Giza Pyramid Canal Theory is the historical record of pharaonic canal construction as it stands today.
”The first major shipping canal was constructed under Pepi I (6th Dynasty), when the rocks of the first cataract were pierced. This helped the Egyptian army to extend their hold on Nubia, from where raids had been conducted against Upper Egypt. The canal was also of economic significance, enabling the transport of blocks of granite and obelisks downriver on sizable ships. The canal had a length of 90 metres, was ten metres wide and nine metres deep, carved through granite.” Source
Pepi I ruled over two hundred (200) years after Khufu. You may be paddling up a dry wadi.
Hi Dr. Troglodyte,
You have discovered, why so many boats have been found far out in the Desert, and all without paddles.(: