River Ivel

This article is about the river in Hertfordshire and Bedfordshire. For the river in Somerset, see River Yeo (South Somerset).
For other uses, see Ivel (disambiguation).
Not to be confused with River Ive.

River Ivel
Footbridge at Radwell
Location
CountryUnited Kingdom.
CountiesHertfordshire, Bedfordshire
CourseBaldock, Radwell, Stotfold, Arlesey, Henlow, Langford, Biggleswade, Sandy, Tempsford.
ContinentEurope
Constituent CountryEngland
Physical characteristics
Source 
 • locationIvel Springs, Baldock.
 • coordinates51°59′35″N 0°11′31″W / 51.99310°N 0.19194°W / 51.99310; -0.19194
 • elevation57 metres (187 ft)[2]
MouthRiver Great Ouse
 • location
Tempsford, Bedfordshire
 • coordinates
52°10′04″N 0°18′14″W / 52.16767°N 0.30384°W / 52.16767; -0.30384
 • elevation
16 metres (52 ft)[3]
Length21 mi (34 km) [1]
Basin features
Tributaries 
 • leftPix brook, River Flit, River Hiz
 • rightPotton Brook[4]

The River Ivel (/ˈaɪvəl/) is a north-flowing chalk stream in south-eastern England. Rising at Ivel Springs in Baldock, Hertfordshire, it flows primarily through Bedfordshire before joining the River Great Ouse at its confluence near Tempsford. The river has a length of 21 mi (34 km).

Geography

The total length of the river is 21 mi (34 km).[1] Its source rises at Ivel Springs near Baldock at an elevation of 57 m (187 ft). The Ivel flows through the settlements of:[2] Radwell, Stotfold, Arlesey, Henlow, Langford, Biggleswade, Sandy, and Blunham, before joining the River Great Ouse near Tempsford at an elevation of 16 m (52 ft).[1][3][5] The River Ivel catchment is bounded by the Chiltern Hills to the south and Greensand Ridge to the north. The River Ivel and the River Flit, and other tributaries rise from the springs in the Chiltern chalk.[6]

The River Ivel has four notable tributaries: Pix Brook, Potton Brook,[4] the River Flit, and the River Hiz.[7]

Geology

The River Ivel is a chalk stream, sustained primarily by groundwater from underlying chalk aquifers, resulting in clear, mineral-rich water. Its headwaters rises at perennial springs at Ivel Springs, with the upper reaches predominantly spring-fed.[a]The River Ivel catchment is bounded by the Chiltern Hills to the south and Greensand Ridge to the north.[9][6] In the county of Bedfordshire, there are two sources of aggregate; Pleistocene river and glacial gravel and sands. The valley gravels lies in the Ivel valley.[11] For some portion of its extent, it is concealed by the boulder clay and alluvium of the valley of the Ivel, and it attains an elevation in the vicinity of Sandy, having a prominent escarpment and its maximum thickness of 220 feet (67 m).[12]

Lower Cretaceous sandstones in Bedfordshire produce an intermittent escarpment and the dissected dip is primarily known locally as the Greensand Ridge. This formation is particularly clear around Sandy where it is cut by the River Ivel.[13]

Ecology

Several nature reserves are located along the River Ivel, including Ivel Springs and Stotfold Mill Meadows, which contain habitats such as wetlands and meadows.[14][15] Local conservation groups, such as RevIvel, records water levels, groundwater abstraction, and pollution. RevIvel is a member of the Chalk Aquifer Alliance (CAA).[16]

Species on the River Ivel
Species Scientific Name
Water Vole Arvicola Amphibius
Kingfisher Alcedo Atthis
Himalayan Balsam Impatiens Glandulifera
American Mink Neovison Vison

There are several native species on the River Ivel, including the Water Vole (Arvicola Amphibius) and the Kingfisher (Alcedo Atthis). Non-Native species occur on the River Ivel these include: Himalayan Balsam (Impatiens Glandulifera) and the American Mink (Neovison Vison).[17][18][19]

Hydrology

Gauging/Measuring Station Highest depth Lowest depth Depth Range
Biggleswade 1.14m - 0.13m - 0.48m
Blunham 1.45m - 0.18m - 0.55m

On 11 February 2009, the highest depth recorded in the measuring station in Biggleswade was 1.14 m (3 ft 9 in).In Blunham, the highest depth recorded in the measuring station reached 1.45 metres (4 ft 9 in) on 3 January 2003.[20][21]

History

The River Ivel, which commences in the River Ouse, or Ouze, at Tempsford, in the county of Bedford, and about 11 mi (18 km) in a southerly direction, to the town of Shefford, in the same county, was made navigable under an act of the 30th George II. entitled,

' An Act for making the River Ivel and the Branches thereof, navigable from the River Ouze at Tempsford, in the county of Bedford, to Shotling Mill, otherwise called 'Burnt Mill', in the parish of Hitchen, in the county of Hertford, and to Black Horse Mill in the parish of Bygrave, in the said county of Hertford, and to the South and North Bridges in the town of Shefford, in the said county of Bedford. '[22][23]

The river was made navigable following an Act of 1757. Locks had been constructed at Tempsford, Blunham, South Mills, and Sandy. The river was made navigable for supplying coal and timber to the towns of Biggleswade and Shefford and the canal had been extended to Shefford in 1823, with locks at Biggleswade, Holme, Stanford and Clifton.[1][22] The canal was abandoned in 1876 when a dam was built across it at Sandy. The introduction of the Great Northern Railway caused its decline. Remnants, such as Holme Lock, still remain close to Jordan's Mill.[1]

Stotfold Mill, a Grade-II listed watermill, had one of the widest corn waterwheels in the United Kingdom. It was destroyed by a fire in 1992, and subsequently rebuilt by the Stotfold Mill Preservation Trust.[24][25] Other corn mills along the river include Bowman's Mill at Astwick, now a Grade II listed private home,[26][27] Holme Mill at Holme still working as a museum,[28] and Franklin's Mill at Biggleswade,[29] converted to apartments.

See also

Notes

  1. ^ Chalk streams are rivers that receive baseflow from the underground chalk aquifer (stores of water in porous rock) and they are often 'gin clear', there are 260 chalk streams globally, 224 of them are in England.[8][9][10]

References

  1. ^ a b c d e Chris Howes (2023). The River Great Ouse and its Tributaries. Imray, Laurie, Norie and Wilson Ltd. p. 53. ISBN 978-1-78679-568-7. Retrieved 3 May 2026.
  2. ^ a b "Detailed maps & routes to explore across the UK | OS Maps". Ordnance Survey. Retrieved 9 May 2026.
  3. ^ a b "Detailed maps and routes to explore the UK | OS Maps". Ordnance Survey. Retrieved 10 May 2026.
  4. ^ a b Marshall G. Hall (2024). Medieval Bridges of Middle England. Windgather Press. p. 26. ISBN 978-1-914427-30-5.
  5. ^ "The River Ivel & Langford Bridge". Langford & District History Society. Retrieved 6 April 2026.
  6. ^ a b "Ivel Operational Catchment". Environment Agency. Retrieved 25 April 2026.
  7. ^ "North Hertfordshire District Council Strategic Flood Risk Assessment" (PDF). North Herts Council. Retrieved 25 May 2026.
  8. ^ "Chalk Streams Engage Environment Agency". Environment Agency. Retrieved 4 May 2025.
  9. ^ a b "River Ivel restoration". Affinity Water. Retrieved 25 April 2026.
  10. ^ "Revitalising the River Ivel Frequently Asked Questions (FAQ)" (PDF). Affinity Water. Retrieved 6 April 2026.
  11. ^ Tony Brown (2009). The Environment and Aggregate-Related Archaeology. Oxbow Books. ISBN 978-1-78297-280-8.
  12. ^ The Victoria History of the county of Bedford. Westminster (A. Constable). 1904. p. 10.
  13. ^ "The Mapping of Landscapes, Geology and Soils of Bedfordshire & Cambridgeshire". Cranfield University. p. 3. Retrieved 7 June 2026.
  14. ^ "Ivel Springs". North Hertfordshire Council. Retrieved 3 April 2026.
  15. ^ "Stotfold mill nature reserve". Retrieved 6 April 2026.
  16. ^ "About us". RevIvel. Retrieved 6 April 2026.
  17. ^ "Invasive Non-Native Species (INNS)". Upper Bedford & Ouse Catchment Partnership. Retrieved 3 April 2026.
  18. ^ "Mink eradication progress". RevIvel. 18 July 2024. Retrieved 3 April 2026.
  19. ^ "The Bedfordshire and River Ivel Drainage Board's Biodiversity Action Plan" (PDF). Retrieved 3 April 2026.
  20. ^ "River Ivel level at Blunham - GOV.UK". check-for-flooding.service.gov.uk. Retrieved 27 May 2026.
  21. ^ "River Ivel level at Biggleswade - GOV.UK". check-for-flooding.service.gov.uk. Retrieved 27 May 2026.
  22. ^ a b Joseph Priestley (1831). Historical Account of the Navigable Rivers, Canals, and Railways, Throughout Great Britain. Longman, Rees, Orme, Brown and Green. p. 380.
  23. ^ Great Britain (1766). Statutes at Large ...: (43 v.) ... From Magna charta to 1800 Volume 22 of Statutes at Large, Great Britain. Great Britain. p. 195.
  24. ^ "Stotfold Mill". Historic England. Retrieved 25 April 2026.
  25. ^ "Stotfold Mill". UK Government.
  26. ^ "Bowman's Mill, Astwick". Mills Archive. Retrieved 7 June 2026.
  27. ^ "Bowman's Water Mill, Astwick - 1393880 | Historic England". historicengland.org.uk. Retrieved 7 June 2026.
  28. ^ "Holme Mills, Holme". Mills Archive. Retrieved 7 June 2026.
  29. ^ "Franklin's Mill, Biggleswade". Mills archive. Retrieved 7 June 2026.

Bibliography

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