I was curious to see why there was a lake in the middle of the desert and happen to see this. If you look at the historical images one can only see the dunes. The dunes must have "Dissolved" (washed away) during the flooding.
I have email this possible find to people in UK, Egypt etc but no one responds back.
I also found a boat in the middle of nowhere. It was obviously uses while the lake was full and got stranded. Will be cool to see it in real life.
after construction of the Aswan dam water periodically can rush into this endorheic basin leaving nice linear pattern on the limestone plateu behind when water level falls and water runs off the depressions. - that cob-web pattern you have mentioned thus have no artificial, but natural origin made by water-flows and (quick) drying-out. (note this depression was flooded only once in 2002, probably that is why the line contours sharper than by the others)
and yep; the boat must have been stranded at a high-water period (2002 imagery date fits again):
In the last year since nobody replied to my observation I thought that what is the chances that this area, thousands of years ago i.e 10000 BC or so received more rain than lately and that this area was always flooded and somehow this area could be flooded using a gate between this area and the rest of the lake. It could have been that this area is slightly lower than the rest of the lake and an irrigation system was possible.
A lot of those lines are just so perfectly formed and square. I showed it to friends and they are like. What. It looks like an old city.
Just due south by 80km is Nabta Playa - (10 000bc Solar temple). There is a documentary on it somewhere in the internet