river in northern Pakistan, formed by the junction of the Gabriāl and Ushu rivers at Kālām in the Kohistān region. Fed by melting snow and glaciers and receiving the drainage of the entire Swāt River valley, the river flows southward, then westward, until joined by the Panjkora River. The united stream then flows southwestward into the Peshāwar Plain and joins the Kābul River at Nisatta after a 200-mile (320-kilometre) course. The Swāt canals irrigate about 160,000 acres (65,000 hectares) in which sugarcane and wheat are the chief crops.