Ulai

Daniel 8:2,16
River flowing near to the city of Shushan, where Daniel saw himself in a vision (Dan. 8:2, 162And I saw in a vision; and it came to pass, when I saw, that I was at Shushan in the palace, which is in the province of Elam; and I saw in a vision, and I was by the river of Ulai. (Daniel 8:2)
16And I heard a man's voice between the banks of Ulai, which called, and said, Gabriel, make this man to understand the vision. (Daniel 8:16)
). It is judged to be the Eulaeus of the Greeks and Romans. Identified by some with the Kerkhah, an affluent of the Tigris, and this agrees with the upper Eulaeus. Others have traced it to the Kuran, another affluent of the Tigris, and this agrees with the lower Eulaeus; but at one part a branch of the former once ran into the latter.