The River Thet is a river in Norfolk, England and is a tributary of the River Little Ouse.It rises in Breckland with sources in Deopham Green and Rockland All Saints[1] and joins the Little Ouse in Thetford after flowing approximately southwest.

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Thet
River Thet at Brettenham
Location of the river mouth within Norfolk
Etymology	From Thetford, in turn from 'Theodford' which is Anglo-Saxon for 'Peoples Ford'
Location
Country	England
Region	Norfolk
Physical characteristics
Source
• location	Deopham Green
• coordinates	52.5507°N 1.0019°E / 52.5507; 1.0019
• elevation	53 m (174 ft)
Mouth	River Little Ouse
• location	Thetford
• coordinates	52.4113°N 0.7485°E / 52.4113; 0.7485
• elevation	10 m (33 ft)
Length	34.3 km (21.3 mi)
Basin size	≈225km2
Basin features
River system	River Little Ouse
Tributaries
• left	Wittle Stream from Middle Harling Fen Stream from Old Buckenham Fen
• right	Stream from Roudham village Stream from Hockham

[2] The primary sources for its various small tributaries include the calcareous valley fen SSSIs Swangey Fen,[3] Old Buckenham Fen,[4] Middle Harling Fen[5] and Kenninghall and Banham Fens with Quidenham Mere.[6]Carr woodland is also a prevalent habitat throughout the floodplain where open wetlands have been invaded by scrub. The underlying geology is clay/loam over chalk for the easternmost parts of the river's course and sand/gravel over chalk for the majority of the river.

Etymology, course and notable settlements nearby

The name actually comes from Thetford[7] rather than the other way around as Thetford was such an important settlement during the Anglo Saxon period from which the name is derived. The other most notable settlement along the Thet is East Harling[8] where the river has been forded for many centuries.[9] Now a brick and concrete bridge carries the B1111 road over the river. Beneath the bridge is a weir and a widened section of river with a gravel bed (elsewhere the riverbed is predominantly mud). Downstream the river passes over another weir at Bridgham where another bridge crosses it and then through the Shadwell Estate. Here it splits into two channels, reconverges and passes a large artificial lake.[10] When the river reaches Thetford it curves south then west again, meeting the Little Ouse just west of Butten Island in the centre of the town.

In the upper reaches of the Thet, there are a series of lakes including flooded gravel pits. These are situated at Snetterton[11] in a linear pattern along the floodplain and also near Attleborough.[12] All of these lakes are on private land and used for fishing.[13]

References

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