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In the late 1990s, the 7mi (11km) long Jubilee River was built as a wide "naturalistic" flood relief channel from Taplow to Eton to help reduce the flood risk in Maidenhead, Windsor and Eton, [62] although it appears to have increased flooding in the villages immediately downstream. Lamdin-Whymark, H. (2001). "Neolithic activity on the floodplain of the River Thames at Dorney". Lithics. 22.

Source of the River Thames moves fives miles for first time in its history". Gloucestershire Live. 5 August 2022 . Retrieved 12 August 2022. High tides happen twice a day. They are a result of the force of gravity from the Moon and the Sun, and the rotation of the Earth. According to Mallory and Adams, the Thames, from Middle English Temese, is derived from the Brittonic name for the river, Tamesas (from * tamēssa), [3] recorded in Latin as Tamesis and yielding modern Welsh Tafwys "Thames". In the post-war era, although the Port of London remains one of the UK's three main ports, most trade has moved downstream from central London. In the late 1950s, the discharge of methane gas in the depths of the river caused the water to bubble, and the toxins wore away at boats' propellers. [61] Entrepreneurs and investors have looked at the greater estuary as a possible place for a new airport, [10] and have expanded Southend Airport in the 2010s, which has a rail link to Liverpool Street station, London among others.Futter, M. N.; Erlandsson, M. A.; Butterfield, D.; Whitehead, P. G.; Oni, S. K.; Wade, A. J. (28 February 2014). "PERSiST: a flexible rainfall-runoff modelling toolkit for use with the INCA family of models". Hydrology and Earth System Sciences. 18 (2): 855–873. Bibcode: 2014HESS...18..855F. doi: 10.5194/hess-18-855-2014 . Retrieved 11 April 2023. In the early 1980s a pioneering flood control device, the Thames Barrier, was opened. It is closed to tides several times a year to prevent water damage to London's low-lying areas upstream (the 1928 Thames flood demonstrated the severity of this type of event).

Three Men in a Boat by Jerome K. Jerome, first published in 1889, is a humorous account of a boating holiday on the Thames between Kingston and Oxford. The book was intended initially to be a serious travel guide, with accounts of local history of places along the route, but the humorous elements eventually took over. The landscape and features of the Thames as described by Jerome are virtually unchanged, and the book's enduring popularity has meant that it has never been out of print since it was first published. Over the coming decades, climate change will make average sea levels rise. High tides will be higher and storm tides bigger and more frequent. This will increase the risk of water going over the estuary’s tidal flood defences (overtopping). Cassell, Paul (1 November 2011). "Hydroelectric power comes to Mapledurham". Berkshire Live. Archived from the original on 11 June 2020 . Retrieved 22 October 2019. Where higher land reaches the coast, there are some larger settlements, such as Clacton-on-Sea to the north in Essex, Herne Bay, Kent, and the Southend-on-Sea area within the narrower part of the estuary.The lower sections of the rivers that flow into the Thames (the tributaries) are affected by the tide. There are major barriers on some of them, including:

Since June 2012, the Port of London Authority has made a by-law, which it enforces, that bans swimming between Putney Bridge and Crossness, Thamesmead (thus including all of central London), without obtaining prior permission, on the grounds that swimmers in that area of the river endanger not only themselves, due to the strong current of the river, but also other river users. [97]This table shows, from west to east, the principal navigation lights, buoys and other marks to the north (port) and south (starboard) of the main deep-water channels of the River Thames from Gallions Reach to the Sunk Light Float. [24] [25] [26] [27] [28] The Thames is in IALA region A so port buoys are red and starboard buoys are green. Before bridges were built, the main means of crossing the river was by ferry. A significant number of ferries were provided specifically for navigation purposes. When the towpath changed sides, it was necessary to take the towing horse and its driver across the river. This was no longer necessary when barges were powered by steam. Some ferries still operate on the river. The Woolwich Ferry carries cars and passengers across the river in the Thames Gateway and links the North Circular and South Circular roads. Upstream are smaller pedestrian ferries, for example Hampton Ferry and Shepperton to Weybridge Ferry, the last being the only non-permanent crossing that remains on the Thames Path. Super sewer' plans to go ahead". BBC News. 12 September 2014. Archived from the original on 27 August 2020 . Retrieved 18 February 2018.

There are 7 end-of-century options for the future of the flood defence system. We will carry out the chosen option together with the other defence upgrades. A decision will be made on the end-of-century option by 2040. Upgrade the Thames Barrier River Ecology". Reconnecting London with the River Thames. Tideway. Archived from the original on 18 February 2018. The Thames contains both sea water and fresh water, thus providing support for seawater and freshwater fish. However, many populations of fish are at risk and are being killed in tens of thousands because of pollutants leaking into the river from human activities. [43] Salmon, which inhabit both environments, have been reintroduced and a succession of fish ladders have been built into weirs to enable them to travel upstream. The option that we choose will need to be operating by 2070. Detailed design and construction takes many years, so we need to decide by 2040. 2050: deadline for completing the first stage of upstream defence upgradesThe network of defences was designed in the 20th century for the water levels that we expected then. We have invested in them so that they still give the standard of protection that we need today. But we need to upgrade them, ready to face higher sea levels later in the 21st century. The Royal river: the Thames, from source to sea: descriptive, historical, pictorial. Henley-on-Thames: Gresham. 1983 [1885]. ISBN 978-0-946095-05-6. OCLC 17631247. Kitson, Peter R (1996). "British and European River Names' ". Transactions of the Philological Society. 94 (2): 73–118. doi: 10.1111/j.1467-968X.1996.tb01178.x.