uvs lake basin (also uvs nuur basin or ubs nuur basin; ) is an endorheic basin located on the territorial border of mongolia and tuva, a republic of the russian federation. the basin is part of the central asian internal drainage basin and is named after uvs lake (uvs nuur, ubsu nur), a large saline lake situated in the western part of its drainage basin. uvs lake is a shallow lake with an area of . its entire basin, which includes several smaller lakes, is .