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Shannon River Basin

February 15, 2024

The Shannon River Basin consists of the area containing Ireland's longest river, the River Shannon, and all of its tributaries and lakes. The official Ordnance Survey Ireland length of the Shannon from its Shannon Pot source is 224 miles (360 km) made up of 63.5 miles (102.2 km) tidal water flow and 160.5 miles (258.3 km) freshwater flow.[1]

Shannon River Basin
Upper Shannon Basin
Location
CountryIreland
Physical characteristics
Source 
 • locationShannon Pot
Mouth 
 • location
Loop Head
Length224 miles
Basin size11,700 km2
Basin features
River systemRiver Shannon
Tributaries 
 • leftOwenmore River (County Cavan)
 • rightBoyle River

Statistics edit

The Shannon Basin is Ireland's largest basin with an area of 11,700 km2 (4,500 sq mi). Including the estuary and the River Feale, the total catchment drains a total of 16,865 km2 (6,512 sq mi).[2]

It has a Long Term Average Flow of 208.1 m3/s (7,350 cu ft/s) (at Limerick City).[3] This is double the flow rate of Ireland's second largest river, the River Corrib (104.8 m3/s [3,700 cu ft/s]).[3] If the discharges from all of the rivers and streams into the Shannon Estuary (including the rivers Feale 34.6 m3/s, Maigue 15.6 m3/s, Fergus 25.7 m3/s, and Deel 7.4 m3/s)[4][5] are added to the discharge at Limerick, the total discharge of the River Shannon at its mouth at Loop Head reaches 300 m3/s (11,000 cu ft/s).

The River Shannon is a traditional freshwater river for just 45% of its total length. Excluding the 63.5-mile (102.2 km) tidal estuary from its total length of 224 miles (360 km), if one also excludes the lakes (L. Derg 24 mi, L. Ree 18 mi, L. Allen 7 mi[6] plus L. Boderg, L. Bofin, L. Forbes, L. Corry) from the Shannon's freshwater flow of 160.5 miles (258.3 km), the Shannon as a freshwater river is only about 100 miles (160 km) long.

The Shannon River Basin is part of the Shannon International River Basin District (SHIRBD)[7] administrative area which has an area of 17,963 km2 (6,936 sq mi) in area. In addition to the Shannon Basin, the district also covers coastal parts of counties Kerry and Clare which drain to the sea. The SHIRBD contains 7,666 km (4,763 mi) of rivers, 1,220 km (760 mi) of coastline including estuaries, and 113 lakes, including 53 over 50 hectares (120 acres) in size. The main land use throughout the SHIRBD area is agriculture (70.7%). Peatlands (11.1%) and forestry (3.2%) are also important. The SHIRBD's population is 618,884 at 34 inhabitants per square kilometre (88/sq mi) (Census data 2002).[8]

 
Lower Shannon Basin including the Shannon Estuary

Furthest sources edit

There are some tributaries within the River Shannon system which have headwaters that are further in length (from source to mouth) than the Shannon Pot source, such as the Owenmore River (County Cavan) in County Cavan, which flows west for 14.5 km (9.0 mi)[9] through the valley of Glangevlin before joining the Shannon about 3 km (2 mi) below the Shannon Pot at Lugnashinna,[10] thus adding 11 km (7 mi) to the Shannon's overall length, bringing it to 372 km (231 mi).

 
Upper Shannon catchment (with Shannon source, Owenmore River (County Cavan) and Boyle River Basin)

Also the Boyle River has a similar claim. The river flow from the furthest reaches of the Boyle catchment to Limerick city has a measurement of 290 km (180 mi).[11] When added to the Shannon's 102.2 km (63.5 mi) estuary this gives a total river flow of 392.1 km (243.6 mi), which makes it the longest river within the River Shannon basin (from source to mouth)—31.6 km (19.6 mi) longer than the Shannon Pot source. Thus the Boyle-Shannon river can be regarded as having the longest natural river flow in Ireland.[12]

Geography edit

The River Shannon Basin touches more than half (17) of Ireland's counties:- Limerick, Clare, Tipperary, Offaly, Westmeath, Longford, Roscommon, Kerry, Galway, Leitrim, Cavan, Sligo, Mayo, Cork, Laois, Meath and Fermanagh.[13]

Towns situated in the Shannon Basin edit

Towns and Villages (with 2011 populations[14]) within the Shannon River Basin and the rivers and riverbanks on which they stand:

Shannon River: (going downstream)

Shannon River tributaries edit

 
River Suck at Ballyforan Bridge

Tributary Sub Catchments edit

 
River Boyle at Coothall

Freshwater Catchments (With Areas - km2) Going downstream

Left Bank:

Right Bank:

Estuarine Catchments Areas

Left Bank:

Right Bank:

There are many other smaller tributaries which join the Shannon along its journey.

Lakes edit

 
Lough Sheelin, County Cavan

There are a multitude of lakes within the Shannon River Basin, both on the main river and throughout the sub-catchments.

Here is a table showing the major lakes:

Lake Area Basin
Lough Derg 130 km2 Shannon
Lough Ree 105 km2 Shannon
Lough Allen 35 km2 Shannon
Lough Sheelin 19 km2 Inny
Lough Ennell 14.34 km2 Brosna
Lough Gara 11.9 km2 Boyle
Lough Derravaragh 10.8 km2 Inny
Lough Owel 10.3 km2 Brosna
Lough Bofin/Boderg/Scannal 9.7 km2[17] Shannon
Lough Key 8.4 km2 Boyle
Lough Graney 3.7 km2 Graney
Lough Forbes 3 km2 Shannon
Lough Eidin (Drumharlow Lough) 2.7 km2 Boyle
Lough Funshinagh 2.5 km2[18] Shannon

See also edit

References edit

  1. ^ "Ordnance Survey (Ireland) Educational Facts". from the original on 2014-09-11. Retrieved 2014-10-09.
  2. ^ a b c d e f g h (PDF). Archived from the original (PDF) on 2014-09-07.
  3. ^ a b South Eastern River Basin Management: Page 38 2016-03-03 at the Wayback Machine
  4. ^ Long-term effects of hydropower installations and associated river regulation on River Shannon eel populations: mitigation and management [1] 2016-03-04 at the Wayback Machine
  5. ^ SFPC Maintenance Dredging Application: Table 3-7 2014-12-08 at the Wayback Machine
  6. ^ "Ask about Ireland". from the original on 2020-01-10. Retrieved 2014-10-09.
  7. ^ . Archived from the original on 2016-04-14. Retrieved 2018-05-08.
  8. ^ Shannon International River Basin District Eel Management Plan 2013-12-14 at the Wayback Machine
  9. ^ Ordnance Survey of Ireland: Rivers and their Catchment Basins 1958 (Table of Reference)
  10. ^ P. W. Joyce (1900). "Cavan". Atlas and Cyclopedia of Ireland. Murphy & McCarthy. from the original on 2012-04-11. Retrieved 2014-10-09.
  11. ^ "River Habitat Survey, Fig. 2". from the original on 2014-09-13. Retrieved 2014-10-09.
  12. ^ "European Commission Rivers Map" (PDF). (PDF) from the original on 2015-08-19. Retrieved 2014-10-09.
  13. ^ Shannon Catchment-based Flood Risk Assessment and Management (CFRAM) Study. Page 3 [2] 2015-04-04 at the Wayback Machine
  14. ^ "Census 2011 – Population Classified by Area - Table 5" (PDF). (PDF) from the original on 2013-11-09. Retrieved 2014-10-12.
  15. ^ Draft Clare County Development Plan 2017-2023 Volume 3b Shannon municipal district written statement and maps December 2015 p.18
  16. ^ a b c d e f g h i j k l m Dublin Marine Institute 1998: Studies of Irish Rivers and Lakes: Moriarty, Christopher - Table 10.1.
  17. ^ "Google Maps". from the original on 2014-12-18. Retrieved 2014-10-12.
  18. ^ (PDF). Archived from the original (PDF) on 2016-03-04. Retrieved 2014-10-12.

February 15, 2024
shannon, river, basin, consists, area, containing, ireland, longest, river, river, shannon, tributaries, lakes, official, ordnance, survey, ireland, length, shannon, from, shannon, source, miles, made, miles, tidal, water, flow, miles, freshwater, flow, river,. The Shannon River Basin consists of the area containing Ireland s longest river the River Shannon and all of its tributaries and lakes The official Ordnance Survey Ireland length of the Shannon from its Shannon Pot source is 224 miles 360 km made up of 63 5 miles 102 2 km tidal water flow and 160 5 miles 258 3 km freshwater flow 1 Shannon River BasinRiver Fergus EnnisUpper Shannon BasinLocationCountryIrelandPhysical characteristicsSource locationShannon PotMouth locationLoop HeadLength224 milesBasin size11 700 km2Basin featuresRiver systemRiver ShannonTributaries leftOwenmore River County Cavan rightBoyle River Contents 1 Statistics 2 Furthest sources 3 Geography 3 1 Towns situated in the Shannon Basin 3 2 Shannon River tributaries 4 Tributary Sub Catchments 5 Lakes 6 See also 7 ReferencesStatistics editThe Shannon Basin is Ireland s largest basin with an area of 11 700 km2 4 500 sq mi Including the estuary and the River Feale the total catchment drains a total of 16 865 km2 6 512 sq mi 2 It has a Long Term Average Flow of 208 1 m3 s 7 350 cu ft s at Limerick City 3 This is double the flow rate of Ireland s second largest river the River Corrib 104 8 m3 s 3 700 cu ft s 3 If the discharges from all of the rivers and streams into the Shannon Estuary including the rivers Feale 34 6 m3 s Maigue 15 6 m3 s Fergus 25 7 m3 s and Deel 7 4 m3 s 4 5 are added to the discharge at Limerick the total discharge of the River Shannon at its mouth at Loop Head reaches 300 m3 s 11 000 cu ft s The River Shannon is a traditional freshwater river for just 45 of its total length Excluding the 63 5 mile 102 2 km tidal estuary from its total length of 224 miles 360 km if one also excludes the lakes L Derg 24 mi L Ree 18 mi L Allen 7 mi 6 plus L Boderg L Bofin L Forbes L Corry from the Shannon s freshwater flow of 160 5 miles 258 3 km the Shannon as a freshwater river is only about 100 miles 160 km long The Shannon River Basin is part of the Shannon International River Basin District SHIRBD 7 administrative area which has an area of 17 963 km2 6 936 sq mi in area In addition to the Shannon Basin the district also covers coastal parts of counties Kerry and Clare which drain to the sea The SHIRBD contains 7 666 km 4 763 mi of rivers 1 220 km 760 mi of coastline including estuaries and 113 lakes including 53 over 50 hectares 120 acres in size The main land use throughout the SHIRBD area is agriculture 70 7 Peatlands 11 1 and forestry 3 2 are also important The SHIRBD s population is 618 884 at 34 inhabitants per square kilometre 88 sq mi Census data 2002 8 nbsp Lower Shannon Basin including the Shannon EstuaryFurthest sources editThere are some tributaries within the River Shannon system which have headwaters that are further in length from source to mouth than the Shannon Pot source such as the Owenmore River County Cavan in County Cavan which flows west for 14 5 km 9 0 mi 9 through the valley of Glangevlin before joining the Shannon about 3 km 2 mi below the Shannon Pot at Lugnashinna 10 thus adding 11 km 7 mi to the Shannon s overall length bringing it to 372 km 231 mi nbsp Upper Shannon catchment with Shannon source Owenmore River County Cavan and Boyle River Basin Also the Boyle River has a similar claim The river flow from the furthest reaches of the Boyle catchment to Limerick city has a measurement of 290 km 180 mi 11 When added to the Shannon s 102 2 km 63 5 mi estuary this gives a total river flow of 392 1 km 243 6 mi which makes it the longest river within the River Shannon basin from source to mouth 31 6 km 19 6 mi longer than the Shannon Pot source Thus the Boyle Shannon river can be regarded as having the longest natural river flow in Ireland 12 Geography editThe River Shannon Basin touches more than half 17 of Ireland s counties Limerick Clare Tipperary Offaly Westmeath Longford Roscommon Kerry Galway Leitrim Cavan Sligo Mayo Cork Laois Meath and Fermanagh 13 Towns situated in the Shannon Basin edit Towns and Villages with 2011 populations 14 within the Shannon River Basin and the rivers and riverbanks on which they stand Shannon River going downstream Dowra Drumshanbo Lough Allen Canal Left Bank 857 Leitrim Village L Bank 485 Carrick on Shannon 3 980 Jamestown L Bank Drumsna L Bank 247 Drumod Lough Boderg L Bank 356 Roosky Right Bank 188 Termonbarry R Bank 366 Cloondara L Bank Lanesborough 1 388 Athlone 20 153 Clonmacnoise L Bank Shannonbridge L Bank 206 Banagher L Bank 1 653 Portumna R Bank 1 530 Terryglass Lough Derg L Bank Mountshannon Lough Derg R Bank 152 Dromineer Lough Derg L Bank 113 Ballina L Bank 2 442 Killaloe R Bank 1 292 O Briensbridge 235 Castleconnell L Bank 1 917 Ardnacrusha Limerick City 87 081 Shannon S Estuary R Bank 9 673 Kilrush S Estuary R Bank 2 695 Carrigaholt S Estuary R Bank Foynes S Estuary L Bank 543 Glin S Estuary L Bank 577 Tarbert S Estuary L Bank 551 Ballylongford S Estuary L Bank 418 Ballybunion S Estuary L Bank 1 354Shannon River tributaries edit nbsp River Suck at Ballyforan BridgeBoyle river Boyle 2 588 Lung river Ballaghaderreen outskirts 1 822 Camlin river Longford 9 601 Hind river Roscommon outskirts 5 693 River Inny Leinster Mullingar 20 103 River Brosna Ballymahon 1 563 Ferbane 1 165 Tullamore Tullamore river 14 361 River Suck Castlerea 1 985 Athleague 241 Ballinasloe 6 577 Little Brosna river Birr 5 452 Ballyfinboy River Borrisokane 1 145 Cloughjordan 511 Nenagh river Nenagh 8 439 River Graney Scariff 798 Ratty river also named Owengarney River or O Garney River 15 Sixmilebridge 1 839 Bunratty 219 River Fergus Ennis 25 360 Newmarket on Fergus 1 773 River Maigue Adare 1 106 River Deel Rathkeale 1 550 Askeaton 1 149 River Feale Listowel 4 338 Abbeyfeale 2 007Tributary Sub Catchments edit nbsp River Boyle at CoothallFreshwater Catchments With Areas km2 Going downstreamLeft Bank L Allen upstream from L Allen outlet 415 km2 2 Eslin River 73 km2 16 River Rinn 311 km2 16 Camlin River 352 km2 16 River Inny Leinster 1 254 km2 16 River Brosna 1 248 km2 16 Little Brosna River 662 km2 16 Ballyfinboy River 182 km2 16 Nenagh River 321 km2 16 Mulkear River 660 km2 2 Right Bank Boyle River 725 km2 16 Hind River 78 km2 16 River Suck 1 600 km2 16 Cappagh Kilcrow 414 km2 16 River Graney 295 km2 16 Estuarine Catchments AreasLeft Bank River Maigue 1 0002 2 River Deel 426 km2 2 River Feale 1 170 km2 2 Right Bank Bunratty River 233 km2 2 River Fergus 1 043 km2 2 There are many other smaller tributaries which join the Shannon along its journey Lakes edit nbsp Lough Sheelin County CavanThere are a multitude of lakes within the Shannon River Basin both on the main river and throughout the sub catchments Here is a table showing the major lakes Lake Area BasinLough Derg 130 km2 ShannonLough Ree 105 km2 ShannonLough Allen 35 km2 ShannonLough Sheelin 19 km2 InnyLough Ennell 14 34 km2 BrosnaLough Gara 11 9 km2 BoyleLough Derravaragh 10 8 km2 InnyLough Owel 10 3 km2 BrosnaLough Bofin Boderg Scannal 9 7 km2 17 ShannonLough Key 8 4 km2 BoyleLough Graney 3 7 km2 GraneyLough Forbes 3 km2 ShannonLough Eidin Drumharlow Lough 2 7 km2 BoyleLough Funshinagh 2 5 km2 18 ShannonSee also editRiver Shannon Shannon Callows Rivers of Ireland List of rivers in Ireland List of loughs of IrelandReferences edit Ordnance Survey Ireland Educational Facts Archived from the original on 2014 09 11 Retrieved 2014 10 09 a b c d e f g h Biology and Management of European Eel Anguilla anguilla L in the Shannon Estuary Ireland PDF Archived from the original PDF on 2014 09 07 a b South Eastern River Basin Management Page 38 Archived 2016 03 03 at the Wayback Machine Long term effects of hydropower installations and associated river regulation on River Shannon eel populations mitigation and management 1 Archived 2016 03 04 at the Wayback Machine SFPC Maintenance Dredging Application Table 3 7 Archived 2014 12 08 at the Wayback Machine Ask about Ireland Archived from the original on 2020 01 10 Retrieved 2014 10 09 Shannon River Basin District Archived from the original on 2016 04 14 Retrieved 2018 05 08 Shannon International River Basin District Eel Management Plan Archived 2013 12 14 at the Wayback Machine Ordnance Survey of Ireland Rivers and their Catchment Basins 1958 Table of Reference P W Joyce 1900 Cavan Atlas and Cyclopedia of Ireland Murphy amp McCarthy Archived from the original on 2012 04 11 Retrieved 2014 10 09 River Habitat Survey Fig 2 Archived from the original on 2014 09 13 Retrieved 2014 10 09 European Commission Rivers Map PDF Archived PDF from the original on 2015 08 19 Retrieved 2014 10 09 Shannon Catchment based Flood Risk Assessment and Management CFRAM Study Page 3 2 Archived 2015 04 04 at the Wayback Machine Census 2011 Population Classified by Area Table 5 PDF Archived PDF from the original on 2013 11 09 Retrieved 2014 10 12 Draft Clare County Development Plan 2017 2023 Volume 3b Shannon municipal district written statement and maps December 2015 p 18 a b c d e f g h i j k l m Dublin Marine Institute 1998 Studies of Irish Rivers and Lakes Moriarty Christopher Table 10 1 Google Maps Archived from the original on 2014 12 18 Retrieved 2014 10 12 THE GSI GROUNDWATER NEWSLETTER Page 9 PDF Archived from the original PDF on 2016 03 04 Retrieved 2014 10 12 Retrieved from https en wikipedia org w index php title Shannon River Basin amp oldid 1174111709, wikipedia, wiki, book, books, library,

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