"WINDSOR CASTLE"
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Tributaries
The main tributaries of the Thames are:
Leach (30 km) joins the Thames near Lechlade, Gloucestershire
Churn (37 km) joins the Thames at Cricklade, Wiltshire
Coln (52 km) joins the Thames at Inglesham, Wiltshire
Windrush (48 km) joins the Thames near Standlake, Oxfordshire
Kennet (77 km) joins the Thames at Reading, Berkshire
Evenlode (68 km) joins the Thames near Bladdon, Oxfordshire
Ock ( 37 km) joins the Thames at Abingdon, Oxfordshire
Loddon (32 km) joins the Thames at Wargrave, Berkshire
Diagram showing the tributaries of the River Thames
Did you know? ...Most rivers are tributaries, which means they join rivers before they reach the sea.
It is said that the River Thames used to be a tributary of the River Rhine
Leach (30 km) joins the Thames near Lechlade, Gloucestershire
Churn (37 km) joins the Thames at Cricklade, Wiltshire
Coln (52 km) joins the Thames at Inglesham, Wiltshire
Windrush (48 km) joins the Thames near Standlake, Oxfordshire
Kennet (77 km) joins the Thames at Reading, Berkshire
Evenlode (68 km) joins the Thames near Bladdon, Oxfordshire
Ock ( 37 km) joins the Thames at Abingdon, Oxfordshire
Loddon (32 km) joins the Thames at Wargrave, Berkshire
Diagram showing the tributaries of the River Thames
Did you know? ...Most rivers are tributaries, which means they join rivers before they reach the sea.
It is said that the River Thames used to be a tributary of the River Rhine
Wednesday, October 22, 2008
The Thames Basin
Drainage basins
Tributaries bring water to the river from a wide area of land. The area of land which supplies a river with water is called its drainage basin or catchment area.
The Thames basin is the name of the area surrounding the River Thames. Any rain falling on it ends up in the Thames, which takes it to the sea.
The Thames basin covers an area of approximately 12,935 square kilometres (4,994 square miles). 13 million people live in the basin, 7 million of which live in London.
The Thames basin receives an average of 690 mm rainfall per year, making it one of the driest parts of the UK.
The yellow area below shows the Thames's drainage basin - the area drained by the Thames and its tributaries.
Tributaries bring water to the river from a wide area of land. The area of land which supplies a river with water is called its drainage basin or catchment area.
The Thames basin is the name of the area surrounding the River Thames. Any rain falling on it ends up in the Thames, which takes it to the sea.
The Thames basin covers an area of approximately 12,935 square kilometres (4,994 square miles). 13 million people live in the basin, 7 million of which live in London.
The Thames basin receives an average of 690 mm rainfall per year, making it one of the driest parts of the UK.
The yellow area below shows the Thames's drainage basin - the area drained by the Thames and its tributaries.
Did you know? The Amazon basin is seven hundred times bigger than the Thames basin.
Flooding
Strong winds can blow sea water up the Thames and cause dangerous floods. In 1953 a bad storm pushed a lot of sea water into the mouth of the Thames. Around 300 people drowned, as well as 11,000 cattle, 9000 sheep, 2400 pigs, 34,000 poultry and 70 horses. The flooding affected 160,000 acres of farmland, 24,000 houses, 200 major industrial premises, 200 miles of railway, 12 gas works and two large power stations.
Action is needed to prevent flooding.
Action is needed to prevent flooding.
Flood defences / Preventing Floods
Thames Flood Barrier
To prevent London flooding the Thames Barrier was built across the Thames at Woolwich at a cost of around £535 million. The Thames Flood Barrier is a tidal barrier which prevents the sea from coming in on really high tides.The width of the Barrier from bank to bank is about 520 metres (a third of a mile).
Defence Walls in London
London is also protected by 150 kilometres (94 miles) of flood walls and embankments. A high wall runs almost all the way along the Thames in London, except for a few high spots where it’s not needed.
Did you know? ..... London is sinking at an estimated 12 inches (30cm) every 100 years.
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