75
global watershed map
(lemmy.world)
source: https://decolonialatlas.wordpress.com/2017/04/18/colorful-river-basin-maps/
It has more detailed maps for each continent too.
Wikipedia says:
parallel dunes
I'm guessing this part of the map uses the actual surface topography, ie how precipitation would run off through the troughs of the dunes, rather than the underlying aquifer structure. Hmmm 🧐.
Why do they all run straight for hundreds of miles? None of the other deserts are like that.
It’s just more efficient to manage. We got to do a lot with very little.
It's the predominant direction of the wind.