My first thought was camel pens.
Makes sense. they are quite large, caravan route?
I was thinking the something similar until I noticed the one with 3 partitions. The central pne has an odd shape with it narrowed on both ends and the central animals would be hard to get to or move efficiently. I suppose that in a resource poor area that the extra effort in rearranging fencing within the pen area may have been a better solution than trying to build more pens from scratch.