The place-mark on the top right hand side of the image shows a line that leads to the place-mark in the centre, which ends near the junction of the outline of a V you can barely see in the image I have posted above. This line, possibly a canal, is broken from time to time by what might be sand dunes.
If you go to Google Earth and explore this region beneath the centre place-mark, you will be as astonished as I was. The phenomenon continues over a much larger region that I have pointed out here, there is much more of a different kind to the right of the V, which do have a similarity to the irrigated fields in South America.
I doubt we will have the answers to everything in our lifetimes...but that shouldn't stop us from looking, and admitting we often don't know how it got there.
Those are vehicle tracks associated with a variety of modern human activities including using the flats for land speed records by Sir Malcolm Campbell and others, kiting, and more.