The River Thames rises near Cirencester, Gloucestershire and
flows roughly eastwards for 215 miles (346 km) out to the North Sea. It is our longest English river and the
second longest, after the Severn, in the UK.
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| Course of River Thames across England |
It drains the whole of Greater London and is tidal up to Teddington Lock … 68 miles from the sea … the rise and fall of the tidal section is 7 metres (24 feet).
It now has 45 navigation locks with accompanying weirs; there
are over 80 islands; its waters vary from fresh to almost salt water as it
reaches the North Sea.
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| River Thames flowing into Rhine |
Surprisingly the River Thames can be identified as a discrete drainage line – as early as 58 million years ago. Until about half a million years ago, the Thames flowed on its existing course through Oxfordshire, before turning to the north-east, reaching the North Sea near Ipswich, East Anglia … and was a tributary of the Rhine.
In those early days its course changed, the last ice age came and altered the landscape dramatically – creating the English Channel from the melt waters, leaving Britain as an island. The river became more as we know it today … flowing ‘happily’ through our capital - providing, over time, London with a great deal of history.
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| Our major rivers |
Heathrow – interestingly – has connections with Caesar
following his expeditions to Britain in 55 and 54 BC. There is a ‘shrine’ at Caesar’s Camp to the north of Heathrow airport – they
are doing a more thorough investigation now.
It is likely the Romans chose Londonium as the Thames, wider
before it was tamed and contained, could be bridged, yet was still tidal … we
are now at Cornhill, near Bank tube station.
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| River Thames, with St Paul's in background .. by Canaletto (1746) |
There were two other ‘hills’ that of Tower Hill, site of the Tower of London, and of Ludgate Hill, crowned by St Paul’s Cathedral. The highest point of Cornhill is 58 feet (17.7 m) above sea level.
As our knowledge and abilities increased the river and its tributaries was used for trade and transport – more movement up and down the river occurred … so when the Romans ‘bridged’ London at Cornhill in about 43 AD – London was in place to be the capital.
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| Old St Paul's with its spire before the Great Fire of London |
Trade was very important to London and great use was made of the Thames’ tributaries into the city – bringing in coal, wood, silver, cloth, food stuffs for animals and peoples … while watermen acted like taxis.
However by the Middle Ages the trade routes around the world were expanding … we had tea, silk, spices coming in from the east; sugar from the Caribbean, timber from Norway and iron ore from Sweden.
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| London Bridge (1616) by Claes van Visscher |
The river became clogged up – but ships were getting larger and went from sail to steam … new docks were demanded. As we’ve all seen in our lifetimes – so much change has gone on.
It’s interesting to remember the Little Ice Age which occurred from about 1540 – 1750 when occasionally the Thames froze over – some times for three months.
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| The frozen Thames (1677) |
The last frost fair was held in 1814 lasting just four days …
but during that time they managed to lead an elephant across the river below
Blackfriars Bridge.
As the river passed through ever increasing urbanised areas it
became more polluted and by the Victorian era was in a sorry state. It had until the early 1800s been a thriving
salmon river.
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| Michael Faraday giving his card to Father Thames - caricature commenting on a letter of Faraday's on the state of the River in 1855 |
The system worked in central London, but seriously fouled the water system downstream until a sewage treatment system was introduced in the late 1800s.
Bazalgette’s sewers (I just love that name!) were pretty mammoth … so large that they’re still effective today – just – London is a-growing and we’re not terribly responsible with our waste etc.
World War II’s bombing damaged the sewers and treatment plants,
which together with the increasing use of detergents after the war, added to
the river’s pollution. A clean-up
operation was begun in 1960.
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| Satirical cartoon by William Heath showing a woman observing monsters in a drop of London water in 1828 |
The natural flow of the river will break down sewage … but the bacteria use up oxygen in the process – leaving little for other life forms … so by 1957 the Natural History Museum declared the Thames biologically dead – that clean-up operation had not come too soon.
The river began to breathe again … and we became more environmentally aware of the damage caused by pesticides, fertilisers etc … there are stricter industry regulations … however occasionally another spin-off occurs – silver was a pollutant - but with people switching to digital photography this has helped nearly eliminate that polluting substance.
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| Oxygenating Barge |
Now there are ‘bubblers’ in the Thames … these are oxygenation craft to be deployed during or after periods of heavy rain, when sudden storm water surges decreased the dissolved oxygen levels in the river. These are still needed and provide reactive systems to ensure the continued improvement of the river Thames.
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| Perch |
Simply by cleaning the river – the fish came back (naturally) and there are now 125 species of fish in the Thames, up from almost none in the 1950s. The fish in turn feed marine mammals, including seals, birds and so the cycle of life goes on …
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| Sea Lamprey - ugly aren't they?! |
We now get seals and porpoises in the Thames and on occasions a whale – which is not good news – they rarely survive, unless they can be turned around to head out to sea once again.
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| Short-snouted Seahorse |
There are other exciting species that have returned – salmon have been seen, eels, the really ugly! lampreys and out in the reeds of the Kent marshes delightful sea-horses – all are very sensitive to pollution … another plus in the life of the Thames.
Yet, as we know plastic is now a serious threat to wildlife as a whole … it affects smaller creatures that are prey for the larger ones.
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| Trap on Thames to catch some of the rubbish as it floats down stream |
A Cleaner Thames campaign was launched in September 2015 to combat plastic waste … it’s a difficult battle, because there are so many sources.
There are other things … as more river taxi boats/cruisers use the river to transport people which disturb the river bed … also making the river noisy and crowded – while it is fast flowing (because of the high walls to contain the river) that makes another challenge for the wildlife …
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| London City Airport in a dock alongside the Thames |
But we go on looking after the Thames as best we can from its early origins as the Tamesas (from tamessa) recorded in Latin flowing out further north into the Wash, Lincolnshire/Norfolk.
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| Father Thames - a Coade stone sculpture by John Bacon in the grounds of Ham House, Richmond |
Father Thames has called time on me and this post! … wild life is in a better position, the banks of the Thames flourish with birds, insects, plants … giving everyone who lives or visits the river and its environs a feast for the senses – 40% of London is green space … so let’s get out feel the wind in our hair and enjoy the great outdoors.
There will be one more of these Bucket List posts … as I have booked (later in October) to climb 60 feet into the scaffolding to check out the art work in the Painted Hall (part 5) - as they make their restoration work – should be fascinating … my goddaughter’s mother is coming to join me… a good meet up ...
Once this series got going ... it became more about Greenwich than anything else - so perhaps I should end tidying up that side of harbourage (if that's a word) ... but I'll leave it to you to look at this brilliant site on the History of the Port of London - whose link is below: so I shall now retire.
An adapted quote at the beginning of their site: "A plot of firm soil by the river's bank made a landing place, which became a port and city of the world - that is London."
Here are some links:
11th century delicacy - Lampreys - one of my very early posts in 2009
A Judge, Gardens and the Great Stink - another of my early posts
St Alfege Church, Greenwich - Henry VIII was baptised here ...but there's a lot more history?!
Plume of Feathers pub in Greenwich Park
History of the Port of London pre 1908 ...
The Londonist - gives us more details on Father Thames ... and the song 'Old Father Thames...' which you may find interesting ...
11th century delicacy - Lampreys - one of my very early posts in 2009
A Judge, Gardens and the Great Stink - another of my early posts
St Alfege Church, Greenwich - Henry VIII was baptised here ...but there's a lot more history?!
Plume of Feathers pub in Greenwich Park
History of the Port of London pre 1908 ...
The Londonist - gives us more details on Father Thames ... and the song 'Old Father Thames...' which you may find interesting ...
Hilary Melton-Butcher
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