The Truro River () is a

river A river is a natural stream of fresh water that flows on land or inside Subterranean river, caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of ...

in the city of

Truro Truro (; ) is a City status in the United Kingdom, cathedral city and civil parish in Cornwall, England; it is the southernmost city in the United Kingdom, just under west-south-west of Charing Cross in London. It is Cornwall's county town, s ...

Cornwall Cornwall (; or ) is a Ceremonial counties of England, ceremonial county in South West England. It is also one of the Celtic nations and the homeland of the Cornish people. The county is bordered by the Atlantic Ocean to the north and west, ...

England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...

, UK. It is the product of the convergence of the two

s named

Kenwyn Kenwyn () is a settlement and civil parish in Cornwall, England, United Kingdom. The settlement is a suburb of the city of Truro and lies 0.5 mi (1 km) north of the city centre, within Truro parish, whereas Kenwyn parish covers an are ...

and Allen which run under the city: the Truro River (named after the city) flows into the

River Fal The River Fal () flows through Cornwall Cornwall (; or ) is a Ceremonial counties of England, ceremonial county in South West England. It is also one of the Celtic nations and the homeland of the Cornish people. The county is bordere ...

, estuarial waters where wildlife is abundant, and then out into the Carrick Roads. The river is navigable up to Truro. The river valleys form a bowl surrounding the city on the north, east and west and open to the Truro River in the south. The fairly steep-sided bowl in which Truro is located, along with high precipitation swelling the rivers and a

spring tide Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon (and to a much lesser extent, the Sun) and are also caused by the Earth and Moon orbiting one another. Tide tables ...

in the River Fal, were major causes of flooding in 1988 which caused large amounts of damage to the city centre. Since then,

flood defences A flood is an overflow of water ( or rarely other fluids) that submerges land that is usually dry. In the sense of "flowing water", the word may also be applied to the inflow of the tide. Floods are of significant concern in agriculture, civi ...

have been constructed around the city, including an emergency

dam A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aqua ...

at New Mill on the River Kenwyn and a tidal barrier on the Truro River, to prevent future problems. The valley of the Tresillian River is between the valleys of the Truro River and the Fal; the Tresillian River flows into the Truro River just upstream of where the latter joins the Fal. Early records give the Tresillian River the name "Seugar" (1297) or "Sowgar" (1530); the meaning of this name is unknown. The river is mentioned in the medieval

Cornish language Cornish (Standard Written Form: or , ) is a Southwestern Brittonic language, Southwestern Brittonic language of the Celtic language family. Along with Welsh language, Welsh and Breton language, Breton, Cornish descends from Common Brittonic, ...

play Bewnans Ke (c. 1550), as the place from which the eponymous Saint Kea embarks for Rosené. It uses the river's Cornish name ''Hildrech'', which in modern spelling is ''Hyldreth''.

Malpas Estuary

The river from the city to the village of Malpas, including Lambe Creek and Calenick Creek, form Malpas Estuary SSSI (

Site of Special Scientific Interest A Site of Special Scientific Interest (SSSI) in Great Britain, or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland, is a conservation designation denoting a protected area in the United Kingdom and Isle ...

). It is an important habitat of tidal

mudflat Mudflats or mud flats, also known as tidal flats or, in Ireland, slob or slobs, are coastal wetlands that form in intertidal areas where sediments have been deposited by tides or rivers. A global analysis published in 2019 suggested that tidal ...

s, which are feeding grounds for

wildfowl The Anatidae are the biological family of water birds that includes ducks, geese, and swans. The family has a cosmopolitan distribution, occurring on all the world's continents except Antarctica. These birds are adapted for swimming, floating o ...

and wading birds as well as fish species including European seabass,

thicklip grey mullet The thicklip grey mullet, ''Chelon labrosus'', is a coastal fish of the family Mugilidae. It typically is about long, with being the maximum recorded. It is named after its thick upper lip and silvery-grey appearance. It is a common fish of s ...

, European flounder and

European eel The European eel (''Anguilla anguilla'') is a species of eel. Their life history was a mystery for thousands of years, and mating in the wild has not yet been observed. The five stages of their development were originally thought to be differe ...

. There is also a small run of migratory

brown trout The brown trout (''Salmo trutta'') is a species of salmonid ray-finned fish and the most widely distributed species of the genus ''Salmo'', endemic to most of Europe, West Asia and parts of North Africa, and has been widely introduced globally ...

(Sea Trout, known in Cornwall as Peel) into the River Allen. The banks of the estuary are also noted for their

flora Flora (: floras or florae) is all the plant life present in a particular region or time, generally the naturally occurring (indigenous (ecology), indigenous) native plant, native plants. The corresponding term for animals is ''fauna'', and for f ...

References

{{authority control Rivers of Cornwall Truro Sites of Special Scientific Interest in Cornwall 1Truro