On a more serious note, I now tend to think any canal building would have been found on the hillside leading down to the waters edge. It is an area where a "slightly level" line can be excavated and maintained. You could be assured shifting sand duns would be minimized. If built on the side leading down to the waters edge, water drainage could possibly be diverted into a flume. And besides, I don't need a paddle here. (:
Any evidence has likely been eroded away. A small canal would be sufficient, for filling the reservoirs surrounding the Pyramids.
Wood Flumes are relatively easy to build.
It could be a combination of both.
10-mile-long wooden water chute to a sheer cliff