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 |
It was a place of pilgrimage and devotion, a sacred river but
also now a frontier between warring factions – those from the south could not
cross, nor could those from the north – never the twain shall meet? Well we know they did …
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) |
Frost Fairs were held and Henry VIII is said to have travelled
to Greenwich by sleigh along the river, even Elizabeth I took walks on the ice
in the winter of 1564.
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 heatwave of 1857 sent the putrid stench of the Thames
wafting into the House of Parliament – they tried to keep ‘the stench’ out … to
no avail – they closed down … but a plan in 1865 for new sewers would be
agreed.
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."
Hilary Melton-Butcher
Positive Letters Inspirational Stories
