Falāta, A desert in which there is an interval of two days with a portion of the day preceding them and a portion of the day following them between the watering of camels and one day between the watering of asses…
-Lane’s Lexicon
Only KhairAllah can say whether the desert of the Darb should be called Falāta, because we Khawajas never went a day between being watered. The camels, yes, they went many days between watering, but no, not the asses.