@forecast
Really...?
when I say make fields he will make rice. [...] Saltwater and rice aren't really a good match
Why are you still bringing up saltwater? I already proved to you that he'll pull up freshwater with three different sources as evidence. Saltwater and any land crop isn't a good match at all!
I never said anything about humans not being able to live near bodies of water.
That you did not. I never implied you said that either. But you raised the point of efficiency and effort to reward ratios. But historically, humanity has shown it's more efficient to live along the coast.
desalinate water in a coastline(your first point)
I'm pretty sure my point was that water is more accessible by the coast. This logic follows because the goal is to
get water, not
how to get water. And it's attainable by either desalination or by digging. Methodology is not the point. If he wants to make a giant rain catcher with his giant shovel, it really doesn't matter as long as he gets water.
disregarding structure because all of us and the mc admits it is dangerous
I'm not arguing that it's merely dangerous. I'm arguing it's physically not possible to achieve, assuming gravity and friction works the same in this fictional world.
Him digging down [...] in a former waterhole will yield water for him that can sustain him with a better effort:reward ratio
But we already know that turned out to be untrue. I proved digging by the coast is easier because water table depth is guaranteed, with graphs might I add. Whereas this former wetlands is not guaranteed, as seen in chapter after him digging so deep. Therefore, effort to reward ratio is proven to be easier by the sea.
The spirit never said anything about the former wetlands being inhabitable
Spirit said it's a wasteland (ch1). Wasteland, meaning desert or barren land (source: wikipedia), is considered inhabitable for humans. That's why we call it wasteland. And that the lands were destroyed (also ch1).
Where the heck did you pull out 100m from?
Rough estimation from drawing. It's specificity is not important. Point is that it's deep.