High Quality Content by WIKIPEDIA articles! The Kennet is a river in the south of England, and a tributary of the River Thames. The lower reaches of the river are navigable to river craft and are known as the Kennet Navigation, which, together with the Avon Navigation, the Kennet and Avon Canal and the Thames, links the cities of Bristol and London. The former local government district of Kennet in Wiltshire was named after it.