Ouse. 1. The Yorkshire Ouse is formed by the junction of the Swale with the Ure. It flows south-east, past York, Selby, and Goole, and 8 miles east of Goole unites with the Trent to form the Humber. It receives the Wharfe and Aire from the west, the Don from the south, and the Derwent from the north. 2. The Great Ouse rises in Northampton, and flows north-east through Buckingham, Bedfordshire, Huntingdonshire, Cambridge, Norfolk, and falls into the Wash at King's Lynn. For two-thirds of its course of 160 miles it is navigable. Its tributaries are the Ivel, Cam, Larke, Little Ouse, and Stoke.