"Thames Path The Thames Path is a National Trail following the River Thames from its source near Kemble in Gloucestershire to the Thames Barrier at Charlton, south east London. It is about long. A path was first proposed in 1948 but it only opened in 1996. The Thames Path's entire length can be walked, and a few parts can be cycled. Some parts of the Thames Path, particularly west of Oxford, are subject to flooding during the winter. The river is also tidal downstream from Teddington Lock and parts of the path may be under water if there is a"
"tonnes per day. These CSOs can cause the deaths of marine life and health hazards for river users. The Thames Tideway Scheme, under construction, aims to divert most of the overflow from sewers into a tunnel under the river. The Thames Estuary is bordered by the coast and the low-lying lands upstream between the mouth of the River Stour on the Essex/Suffolk border and The Swale in north Kent. It is now usually designated the Greater Thames Estuary and is one of the largest inlets on the coast of Great Britain. The water can rise by 4 metres moving at"
"empty at many low tides. It was often at low tide slightly watered before 1894 as a final head of water along the Thames is maintained above Richmond footbridge and more surface water drains in Southwark ran into it. The maximum high tide is regulated by use of the Thames Barrier which usually enables the water to stay more than below the embankments. During exceptional tidal surges where the Barrier proves insufficient water levels have topped the walkways adjoining buildings on Shad Thames and Mill Street. The long rectangular inlet opens to the river 420 metres east of Tower Bridge."
"Locks and weirs on the River Thames The English River Thames is navigable from Cricklade (for small boats) or Lechlade (for larger boats) to the sea, and this part of the river falls 71 metres (234 feet). There are 45 locks on the river, each with one or more adjacent weirs. These lock and weir combinations are used for controlling the flow of water down the river, most notably when there is a risk of flooding, and provide for navigation above the tideway. From ancient times there were many obstructions across the Thames, for fish-pounds and millers' weirs. They are"
"Thames Estuary), the river is subject to tidal activity from the North Sea. Before the lock was installed, the river was tidal as far as Staines, about upstream. London, capital of Roman Britain, was established on two hills, now known as Cornhill and Ludgate Hill. These provided a firm base for a trading centre at the lowest possible point on the Thames. A river crossing was built at the site of London Bridge. London Bridge is now used as the basis for published tide tables giving the times of high tide. High tide reaches Putney about 30 minutes later than"
"the Normal Tidal Limit, in periods of very high fluvial flow the tidal influence can be seen as far upstream as East Molesey on the Thames. During the barrier's entire history up to October 2017, there have been 183 flood defence closures. The barrier was closed twice on 9 November 2007 after a storm surge in the North Sea which was compared to the one in 1953. The main danger of flooding from the surge was on the coast above the Thames Barrier, where evacuations took place, but the winds abated a little and, at the Thames Barrier, the 9"
"is in IALA region A so port buoys are red and starboard buoys are green. Thames estuary navigation marks Notes Thames Estuary The Thames Estuary is where the River Thames meets the waters of the North Sea, in the south-east of Great Britain. The limits of the estuary have been defined in several ways: The estuary is one of the largest of 170 such inlets on the coast of Great Britain. It constitutes a major shipping route: its thousands of movements each year include large oil tankers, container ships, bulk carriers and roll-on/roll-off (ro-ro) ferries entering the estuary for the"
"Tideway The Tideway is the part of the River Thames in England that is subject to tides. This stretch of water is downstream from Teddington Lock and in its widest definition is just under long. The Tideway includes the Thames Estuary, the Thames Gateway and the Pool of London. Depending on the time of year, the river tide rises and falls twice a day by up to 7 m (24 ft) and, due to the need to overcome the outflow of fresh water from the Thames Basin, it takes longer to subside (6–9 hours) than it does to flow in"
"of steel up to thick. The gates are filled with water when submerged and empty as they emerge from the river. The four large central gates are high and weigh 3,700 tonnes each. Four radial gates by the riverbanks, also about 30 metres (100 ft) wide, can be lowered. These gate openings, unlike the main six, are non-navigable. A Thames Barrier flood defence closure is triggered when a combination of high tides forecast in the North Sea and high river flows at the tidal limit at Teddington weir indicate that water levels would exceed in central London. Though Teddington marks"
"The Environment Agency has patrol boats (named after tributaries of the Thames) and can enforce the limit strictly since river traffic usually has to pass through a lock at some stage. A speed limit of applies. There are pairs of transit markers at various points along the non-tidal river that can be used to check speed – a boat travelling legally taking a minute or more to pass between the two markers. The tidal river is navigable to large ocean-going ships as far upstream as the Pool of London and London Bridge. Although London's upstream enclosed docks have closed and"
"not specific to the river habitat. 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. 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. On 5 August 1993, the largest non-tidal salmon in recorded history was caught close to Boulters Lock in Maidenhead. The specimen weighed and measured in length."
"indicate the limit of the City's rights. In Victorian times, the Lord Mayor would come in procession by water and touch the Staines stone with a sword to re-affirm the City's rights. Control of the river passed from the City to the Thames Conservancy, and then below Teddington to the Port of London Authority and above it to Thames Water Authority and finally the Environment Agency. In medieval times before the canalisation of the Thames, Staines-upon-Thames was the highest point at which the high tide was perceivable for a few minutes every semi-diurnal tide (twice a day), adding some millimetres"
"further upstream, near the village of Inglesham, where the Thames and Severn Canal joins the River Thames. Rowing boats can reach even further upstream, to Cricklade. Lechlade is a popular resort for Thames boating. Boats of different types can be hired from here, from rowing boats to river cruisers. The highest lock on the Thames is St John's Lock, at Lechlade, where there is a statue of Old Father Thames overlooking the boating activities. There is a view from St John's Bridge across the lock and the meadows to the spire of St Lawrence's parish church. The River Leach flows"
"inland. These include cormorant, black-headed gull and herring gull. The mute swan is a familiar sight on the river but the escaped black swan is more rare. The annual ceremony of Swan Upping is an old tradition of counting stocks. Non-native geese that can be seen include Canada geese, Egyptian geese and bar-headed geese, and ducks include the familiar native mallard, plus introduced Mandarin duck and wood duck. Other water birds to be found on the Thames include the great crested grebe, coot, moorhen, heron and kingfisher. Many types of British birds also live alongside the river, although they are"
"highest tidal range in Britain – second only to the River Severn. The narrows in the river estuary between Dingle Point on the Liverpool banks to New Brighton on the Wirral, forces water to flow faster creating a deep channel along the section of river. Strong river water currents have led to proposals for the future construction of a tidal barrage to generate electricity and create another crossing. Very high spring tides can generate a tidal bore from Hale as far upstream as Warrington. Taylor's Bank is a large sandbank extending out to sea on the north side of the"
"their present width. Since the Victorian era the Thames has been extensively embanked, and many of its London tributaries now flow underground. The Thames is a tidal river, and London is vulnerable to flooding. The threat has increased over time because of a slow but continuous rise in high water level by the slow 'tilting' of the British Isles (up in Scotland and Northern Ireland and down in southern parts of England, Wales and Ireland) caused by post-glacial rebound. In 1974, a decade of work began on the construction of the Thames Barrier across the Thames at Woolwich to deal"
"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 River Thames flowing through London is a classic river estuary, with sedimentary deposition restricted through manmade embankments. The district of Teddington a few miles south-west of London's centre marks the boundary between the tidal and non-tidal parts of the Thames, although it is still considered a freshwater river about as far east as Battersea insofar as the average salinity is very low and the fish fauna consists predominantly of freshwater"
"extensive brackish water habitats worldwide are estuaries, where a river meets the sea. The River Thames flowing through London is a classic river estuary. The town of Teddington a few miles west of London marks the boundary between the tidal and non-tidal parts of the Thames, although it is still considered a freshwater river about as far east as Battersea insofar as the average salinity is very low and the fish fauna consists predominantly of freshwater species such as roach, dace, carp, perch, and pike. The Thames Estuary becomes brackish between Battersea and Gravesend, and the diversity of freshwater fish"
"St Saviour's Dock St Saviour's Dock is a small inlet-style dock in London, England, on the south bank of the River Thames, 420 metres east of Tower Bridge. It forms the eastern end of the picturesque and incrementally increased embankment that starts at Tower Bridge known as Shad Thames. The east side of the Dock is Jacob's Island. The dock has had since its excavation a high tidal range, with today a maximum recorded rise and fall of four metres. Furthest inland the bed of the inlet is about one metre above the low-tide mark of the Thames so is"
"Thames Tunnel The Thames Tunnel is an underwater tunnel, built beneath the River Thames in London, connecting Rotherhithe and Wapping. It measures 35 feet (11 m) wide by 20 feet (6 m) high and is 1,300 feet (396 m) long, running at a depth of 75 feet (23 m) below the river surface measured at high tide. It was the first tunnel known to have been constructed successfully underneath a navigable river and was built between 1825 and 1843 using Marc Isambard Brunel's and Thomas Cochrane's newly invented tunnelling shield technology, by Brunel and his son Isambard Kingdom Brunel. The"
"on the River Thames at Teddington (Teddington lifeboat station), Chiswick (Chiswick lifeboat station), Victoria Embankment/Waterloo Bridge (Tower Lifeboat Station) and Gravesend (Gravesend lifeboat station). The Thames is maintained for navigation by powered craft from the estuary as far as Lechlade in Gloucestershire and for very small craft to Cricklade. The original towpath extends upstream as far as the connection with the now disused Thames and Severn Canal at Inglesham, one and a half miles upstream of the last boat lock near Lechlade. From Teddington Lock to the head of navigation, the navigation authority is the Environment Agency. Between the sea"
"Thames Barrier The Thames Barrier prevents the floodplain of most of Greater London from being flooded by exceptionally high tides and storm surges moving up from the North Sea. It has been operational since 1984. When needed, it is closed (raised) during high tide; at low tide it can be opened to restore the river's flow towards the sea. Built approximately due east of the Isle of Dogs, its northern bank is in Silvertown in the London Borough of Newham and its southern bank is in the New Charlton area of the Royal Borough of Greenwich. The report of Sir"
"Thames Estuary The Thames Estuary is where the River Thames meets the waters of the North Sea, in the south-east of Great Britain. The limits of the estuary have been defined in several ways: The estuary is one of the largest of 170 such inlets on the coast of Great Britain. It constitutes a major shipping route: its thousands of movements each year include large oil tankers, container ships, bulk carriers and roll-on/roll-off (ro-ro) ferries entering the estuary for the Port of London and the Medway Ports of Sheerness, Chatham and Thamesport. The traditional Thames sailing barge worked in this"
"the speed limit, it should take a minute or more to reach the second pair of markers after passing the first pair of markers. On the upper reaches of the Thames, the speed limit is 8 km per hour or 133.3m per minute, and so the markers are set 133.3m apart. On the River Thames, there are markers on the reaches above Teddington Lock, Sunbury Lock, Cookham Lock, Sonning Lock, Day's Lock and Osney Lock. Navigation transit markers Navigation Transit Markers are posts placed alongside a navigation to allow powered craft to check their speed. There are examples along the"
"400 kV Thames Crossing The 400 kV Thames Crossing is an overhead power line crossing of the River Thames, between Botany Marshes in Swanscombe, Kent, and West Thurrock, Essex, England. Its towers are the tallest electricity pylons in the UK. The present crossing was built in 1965, and comprises two 190-metre (623 feet) tall lattice towers each side of the Thames. Some suggest that the choice of this height was deliberate, being just taller than the BT Tower in London. The span is 1372 metres (4501 feet), the minimum height of the conductors over the river is 76 metres (249"
"83 in his list The downstream limit of the City's rights is about 33.5 miles (54 km) as the crow flies from London Bridge and is marked on both banks of the Thames. On the south bank, the marker is the London Stone which stands at beside the mouth of Yantlet Creek on the Isle of Grain. The overall height of the monument is about 8 metres. The main column has an inscription, now illegible. The plinth on which it stands has an inscription listing various worthy gentlemen who were probably involved in the re-erection of the stone in Victorian"
"a long boundary with the River Thames in its southernmost salient, which almost surrounds Spelthorne. Old Shepperton is almost surrounded by the extreme southern meander within this. Prehistoric glacial retreat north of this has made the north bank almost flat for a considerable distance and as such, elevation never exceeds 14 m above mean sea level (on the border of Laleham). The river never exceeds 11.5 m, (beside Dumsey Meadow and under Chertsey Bridge). The lowest elevation is 9 m in flood meadows at the confluence of the Ash with the Thames. The Ash is the border with Littleton and"
"fall of water thereby maintaining a head of water to aid navigability at and around low tide. Though the weir at Teddington Weir marks the managed river's usual tidal limit, after prolonged rainfall causing very high fluvial flow, specifically at high tide, a higher limit of slack water (stand of the tide) causes eddies to arise as far upstream as the top of this reach, the next lock. The large, bow-shaped Teddington Weir is against the opposite bank. A series of two footbridges at differing heights make up a structure which crosses the locks, the middle island that has the"
"is tidal, it is the centre of the low water channel. This ""centre of river"" arrangement ends just upstream of the Tamar Bridge at Saltash, downstream of which the counties officially extend only to their respective (tidal) bank's low water mark. The river is dammed at two points of its upper course, forming two reservoirs in place of the natural river: at Upper Tamar Lake the border follows the line of the river as it was prior to the construction of the reservoir (therefore now within the lake), whilst at the older Lower Tamar Lake the border was re-aligned along"
"Head of tide Head of tide or tidal limit is the farthest point upstream where a river is affected by tidal fluctuations, or where the fluctuations are less than a certain amount. This applies to rivers which flow into tidal bodies such as oceans, bays and deltas. Though this point may vary due to storms, spring tides, and seasonal or annual differences in water flows, there is generally an average point which is accepted as the head of tide (in Great Britain this is the Normal Tidal Limit, typically noted on Ordnance Survey maps as 'NTL'). A river's tidal data"
"shallow Thames Estuary, where its tidal waters are caught in the vortex of the tidal push from Atlantic waters via both the north and south of the British Isles. Off Herne Bay, the running ebb current moves at 10.15 knots, and the flow at . Where strong currents meet and divide, or are disrupted by uneven coastal features, there are eddies. After Hampton Pier was first built, the flow running west along Herne Bay beach dropped its sand and pebbles on the east side of the pier instead of replenishing beach material in front of the new development. Subsequently, after"
"by an obelisk just downstream of Teddington Lock (the upstream limit of the tidal river) to the end of the Kent/Essex strait of the North Sea (between Margate to the south and Gunfleet Lighthouse, near Frinton-on-Sea, to the north,) a total of about 95 miles (150 km). The PLA does not cover the Medway or the Swale. From the City of London, via the Thames Conservancy, the PLA inherited the conservancy, management and control of the river instead of ownership of the bed of the river and foreshore (the Crown was prohibited from alienating any of its lands by section"
"on the Thames include: Other regattas, head races and university bumping races are held along the Thames which are described under Rowing on the River Thames. Sailing is practised on both the tidal and non-tidal reaches of the river. The highest club upstream is at Oxford. The most popular sailing craft used on the Thames are lasers, GP14s and Wayfarers. One sailing boat unique to the Thames is the Thames Rater, which is sailed around Raven's Ait. Skiffing has dwindled in favour of private motor boat ownership but is competed on the river in the summer months. Six clubs and"