a river in the Bashkir ASSR and partly in Orenburg Oblast, RSFSR. It empties from the left into the Belaia River (of the Kama River basin) at the city of Ufa. The Dema is 535 km long and drains an area of 12,800 sq km. It originates on the northern slopes of the Obshchii Syrt. Its valley is wide and its course, winding. In its lower reaches there are numerous channels and oxbow lakes. The mean annual flow rate at the mouth is 35 cubic meters per second. The city of Davlekanovo is located on the river.