How come some countries have 0 water sq km? What does that even mean?
It means they have no surface water; no rivers, no lakes, nothing, and very small rainfall ending up in natural reservoirs.
Why not just make a decent network of reservoirs and canals. Much cheaper and easy to build and providing big enough investment, it could take water very far.
I wonder what the aquifer resources of somalia are? It seems like most of the rain water sinks deep into the ground, even in the south some areas always look arid and dry.
btw you can green the desert sustainably
Again, I repeat, its a waste of water. Its like investing money in a beaten car. "Greening the desert" is very stupid, I wonder why Eritrea doesn't learn from the Israelis or the Uzbeks or the Americans or any other society that has foolishly tried to put things where they didn't belong; we can only alter nature so much but our powers are limited. When I was a kid I used to think that planting trees in arid places would recreate the conditions of a true forest and that rainfall would return to these arid areas - but none of that happens.
"Greening the desert" is an illusion. When you plant a forest in the desert it won't remain, it'll die if you don't continue to water it. In other words - you're just running a fancy GARDEN. Nothing more. It has no benefits other than beauty, that is it. You can grow food, but its at a high cost. Since there's no rain you'll be pumping a lot more water and for a small gain. This becomes dangerous when you start tapping aquifers, then you begin engaging in what's known as "water mining."
The Eritreans are stupid, just like the Soviets were and just as the Chinese are. All authoritarian regimes controlled tightly by the state have a terrible record of abusing resources. Cuba is the only positive example.