Thanks for the references.  In the USA for example paleogeographers have given a name for the ancient lake,  Lake Bonneville whose remains today is the Great Salt Lake. in Utah,  That is what I am asking about the ancient river and huge ancient lake in the Empty Quarter, do they have official names?

The first feature in the north can be called as Wadi Rimah and the second feature can be called Wadi Adwasir both formed gravel fans or and lake beds underneath sand sheets