The River Thames is a river that flows through southern England. It is the longest river entirely in England and the second longest in the United Kingdom, after the River Severn. While it is best known for flowing through :London, the river also flows alongside other towns and cities, including Oxford, Reading, Henley-on-Thames and Windsor. In an alternative name, derived from its long tidal reach up to Teddington Lock in south west London, the lower reaches of the river are called the Tideway. The section of the river running through Oxford is traditionally called the Isis.With a total length of 215mi, the Thames is the longest river entirely in England and the second longest in the United Kingdom. It rises at Thames Head in Gloucestershire, and flows into the North Sea via the Thames Estuary. On its way, it passes through London, the country's capital, where the river is deep and navigable to ships; the Thames drains the whole of Greater London. Its tidal section, reaching up to Teddington Lock, includes most of its London stretch and has a rise and fall of 7m. Running through some of the driest parts of mainland Britain and heavily abstracted for drinking water, the Thames' discharge is low considering its length and breadth: the Severn has a discharge almost twice as large on average despite having a smaller drainage basin. In Scotland, the Tay achieves more than double the average discharge from a drainage basin that is 60% smaller.
River Thames, , ,
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