Following on from my earlier question here: Can a water transport canal be excavated by water power?
I have abandoned the self channeling as too difficult. So manual digging will be required. I need to get a handle on how big the canal might reasonably be. This will obviously depend (among other things) on the time and manpower available, so to simplify I will talk about cubic metres moved per man day.
Assume the same sand/loam/clay surface but add a solid rock foundation a few metres down (at a depth that is most convenient to construction). Take manual labor using basic picks, shovels and wheel barrows as an initial starting point for cubic metres dug per man day calculation.
The question is how much more efficient than this basic set up can they make their operation if they use a wider range of mechanical and animal based equipment and manage the work intelligently? All pre industrial devices are in scope, levers, pulleys, cranes, wheeled carts, horses, other animals and anything else that you can think of. What level of multiplier should I add to the basic mandrolic method?
There are no steam engines or internal combustion engines, but this society is very advanced in other respects. For example they are familiar with all manner of hydraulic calculations such as the manning equation for channel flow estimation.