|Native name||Garona (Occitan)|
|Countries||France and Spain|
|• elevation||2,600 m (8,500 ft)|
| Gironde estuary,|
|Length||529 km (329 mi)|
|Basin size||56,000 km2 (22,000 sq mi), or including Dordogne: 84,811 km2 (32,746 sq mi)|
|• average||650 m3/s (23,000 cu ft/s)|
The Garonne ( /, -/ , also US: // , French: [ɡaʁɔn] ; Occitan, Catalan, Basque, and Spanish : Garona, Occitan pronunciation: [ɡaˈɾunɔ, ɡaˈɾɔnɔ] ; Latin : Garumna or Garunna) is a river of southwest France and northern Spain. It flows from the central Spanish Pyrenees to the Gironde estuary at the French port of Bordeaux – a length of 529 km (329 mi), of which 47 km (29 mi) is in Spain (Val d'Aran); the total length extends to 602 km (374 mi) if one includes the Gironde estuary between the river and the sea. Its basin area is 56,000 km2 (22,000 sq mi), which increases to 84,811 km2 (32,746 sq mi) if the Dordogne River, which flows from the east and joins the Garonne at Bec d'Ambès to form the Gironde estuary, is included.
Umayyad and Aquitanian forces fought the Battle of the River Garonne in 732 beside the river near present-day Bordeaux.
The name derives from Garumna, a Latinized version of the Aquitanian name meaning "stony river" ("kar" relating to "stone" and "-ona" relating to "river").
The Garonne's headwaters are to be found in the Aran Valley in the Spanish Pyrenees, though three different locations have been proposed as the true source: the Uelh deth Garona at Plan de Beret (), the Ratera-Saboredo cirque ), or the slopes of Pic Aneto (Salterillo-Barrancs ravine according to the season).
The Uelh deth Garona at 1,862 metres (6,109 ft) above sea level has been traditionally considered as the source of the Garonne. From this point a brook (called the Beret-Garona) runs for 2.5 kilometres (1.6 mi) until the bed of the main upper Garonne valley. The river runs for another 38 kilometres (24 mi) until the French border at Pont de Rei , 40.5 kilometres (25.2 mi) in total.
The Ratera-Saboredo cirque is the head of the upper Garonne valley, and its upper lake at 2,600 metres (8,500 ft) above sea level is the origin of the Ruda-Garona river, running for 16 kilometres (9.9 mi) until the confluence with the Beret-Garona brook, and another 38 kilometres (24 mi) until the French border at Pont del Rei, 54 kilometres (34 mi) in total. At the confluence, the Ruda-Garona carries 2.6 cubic metres per second (92 cu ft/s) of water. The Ratera-Saboredo cirque has been pointed by many researchers as the origin of the Garonne.
The third thesis holds that the river rises on the slopes of Pic Aneto at 2,300 metres (7,500 ft) above sea level and flows by way of a sinkhole known as the Forau de Aigualluts ( ) through the limestone of the Tuca Blanca de Pomèro and a resurgence in the Val dera Artiga above the Aran Valley in the Spanish Pyrenees. This underground route was suggested by the geologist Ramond de Carbonnières in 1787, but there was no confirmation until 1931, when caver Norbert Casteret poured fluorescein dye into the flow and noted its emergence a few hours later 4 kilometres (2.5 mi) away at Uelhs deth Joèu ("Jove's eyes" ) in the Artiga de Lin on the other side of the mountain. From Aigualluts to the confluence with the main river at the bed of the upper Garonne valley at 800 metres (2,600 ft) above sea level, the Joèu has run for 12.4 kilometres (7.7 mi) (16 kilometres more to get to the French border), carrying 2.16 cubic metres per second (76 cu ft/s) of water, while the main river is carrying 17.7 cubic metres per second (630 cu ft/s).
Despite the lack of universal agreement upon definition for determining a stream's source, the United States Geological Survey, the National Geographic Society, and the Smithsonian Institution agree that a stream's source should be considered as the most distant point (along watercourses from the river mouth) in the drainage basin from which water runs.
The Ratera-Saboredo cirque is the "most distant point (along watercourses from the river mouth) in the drainage basin from which water runs",and the source of the Garonne, according to the United States Geological Survey, the National Geographic Society, and the Smithsonian Institution convention upon determining a stream's source.
The Garonne follows the Aran Valley northwards into France, flowing via Toulouse and Agen towards Bordeaux, where it meets the Gironde estuary. The Gironde flows into the Atlantic Ocean (Bay of Biscay). Along its course, the Garonne is joined by three other major rivers: the Ariège, the Tarn, and the Lot. Just after Bordeaux, the Garonne meets the Dordogne at the Bec d'Ambès, forming the Gironde estuary, which after approximately 100 kilometres (62 mi) empties into the Atlantic Ocean. Other tributaries include the Save and the Gers.
The Garonne is one of the few rivers in the world that exhibit a tidal bore. 120 kilometres (75 mi) from the Atlantic, and even further upstream to Cadillac, although the tidal bore appears and disappears in response to changes in the channel bathymetry. In 2010 and 2012, some detailed field studies were conducted in the Garonne's Arcins channel between Arcins Island and the right bank close to Lastrene township. A striking feature of the field data sets was the large and rapid fluctuations in turbulent velocities and turbulent stresses during the tidal bore and flood flow.Surfers and jet skiers could ride the tidal bore at least as far as the village of Cambes,
The European sea sturgeon (Acipenser sturio), also known as the Atlantic sturgeon or common sturgeon, is now a Critically Endangered species (IUCN) status . This species of sturgeon can reach a length of 6 m (20 ft), weigh up to 400 kg (880 lb) and can reach an age of 100 years. Previously found on most coasts of Europe, it has now become so rare that they only breed in the Garonne river basin in France. Conservation projects are under way to save this fish from extinction via species reintroduction from aquaculture, with the first releases having been made in 1995.
Following the flow of the river:
The Garonne plays an important role in inland shipping. The river not only allows seagoing vessels to reach the port of Bordeaux but also forms part of the Canal des Deux Mers, linking the Mediterranean Sea and the Atlantic Ocean.
From the ocean, ships pass through the Gironde estuary up to the mouth of the Garonne (to the right of the Dordogne when sailing upstream). Ships continue on the tidal river Garonne up to the Pont de Pierre (stone bridge) in Bordeaux. Inland vessels continue upstream to Castets-en-Dorthe, where the Canal de Garonne joins the river. Prior to the building of the Canal lateral à la Garonne, between 1838 and 1856, shallow-draught boats used the Garonne itself as far as Toulouse. However, navigation on the upper river was very uncertain, and this stretch of the river is no longer considered navigable. Instead the lateral canal takes boats through 53 locks to the town of Toulouse, where the canal meets the Canal du Midi.
The upstream part of the river, upstream from Toulouse depends primarily on snow and snow melt. The lower/downstream part is rain fed as well as its main tributaries.
The Garonne also feeds several channels/canals:
SANDRE assigns to the Garonne a hydrographic identity number 0 --- 00000 and the generic code O --- 000014,15.
A flood of the Garonne in 1930 broke the dike in Thivras (Marmande).
In Toulouse, the Garonne has been the cause of many floods, especially since its left bank is inhabited.
The earliest records of floods are from around 1177. It is also recorded to have flooded in 1220, 1258, 1430, 1523, 1536 and in 1589, 1608, 1658, 1673, 1675, 1709, 1712, 1727, 1750, 1772, 1788, 1804 and 1810. In 1772, the Garonne reached 8 meters 50.In the recent centuries, in 1827, 1835, 1855 and 1856/7.
In Toulouse, in 1827, the water level of the Garonne rose four meters above the ordinary level and filled the arches of the Pont de Pierre and Pont Neuf.
In 1835, the Garonne rose to five meters above normal and 35 meters above the low water level and flowed through the four arcs of the Pont de Pierre.
Flood of the Garonne in 1835: 7,50 m at Toulouse Pont-Neuf
Flood of the Garonne in 1855: 7.25 m at Toulouse Pont-Neuf
Flood of the Garonne in 1875: 9,70 m to Toulouse Pont-Neuf (or 8m32 according to vigicrue).
Flood of the Garonne in 1879: 4,87 m at Toulouse Pont-Neuf
Flood of the Garonne in 1890: 3.30 m at Toulouse Pont-Neuf
Flood of the Garonne in 1900: 4,00 m in Toulouse Pont-Neuf
Flood of the Garonne in 1905: 4.24 m at Toulouse Pont-Neuf
Crete of 1927 in Aquitaine, particularly imposing after the confluence of the Garonne with the Lot (of which it remained raw reference), insignificant upstream18.
Flood of the Garonne in 1952: 4,57 m at Toulouse Pont-Neuf
Flood of the Garonne in 1977: 4,31 m in Toulouse Pont-Neuf
Flood of the Garonne in 2000: 4.38 m at Toulouse Pont-Neuf
Flood of the Garonne in 2004: 3,52 m at Toulouse Pont-Neuf
In 1777, the Garonne suffered an extraordinary flood to the point that the priest of Bourdelles took the trouble to retranscribe the event, at the end of the acts of the year, in the parish register of baptisms, marriages and deaths.
Bordeaux is a port city on the river Garonne in the Gironde department in Southwestern France.
The Seine is a 775-kilometre-long (482 mi) river in northern France. Its drainage basin is in the Paris Basin covering most of northern France. It rises at Source-Seine, 30 kilometres (19 mi) northwest of Dijon in northeastern France in the Langres plateau, flowing through Paris and into the English Channel at Le Havre. It is navigable by ocean-going vessels as far as Rouen, 120 kilometres (75 mi) from the sea. Over 60 percent of its length, as far as Burgundy, is negotiable by large barges and most tour boats, and nearly its whole length is available for recreational boating; excursion boats offer sightseeing tours of the river banks in the capital city, Paris.
The Gironde estuary is a navigable estuary in southwest France and is formed from the meeting of the rivers Dordogne and Garonne just downstream of the centre of Bordeaux. Covering around 635 km2 (245 sq mi), it is the largest estuary in western Europe.
Haute-Garonne is a department in the Occitanie region of Southwestern France. Named after the Garonne River, which flows through the department. its prefecture and main city is Toulouse, the country's fourth-largest. In 2016, it had a population of 1,348,183.
The Aude is a river of southern France that is 224 kilometres (139 mi) long. Its source is in the Pyrenees mountains then runs to Carcassonne and finally reaches the Mediterranean Sea near Narbonne. The river is navigable by raft or canoe for nearly all of its length. It is registered as essential to the Languedoc-Roussillon region.
The Canal du Midi is a 240 km (150 mi) long canal in Southern France. Originally named the Canal royal en Languedoc and renamed by French revolutionaries to Canal du Midi in 1789, the canal is considered one of the greatest construction works of the 17th century.
A tidal bore, often simply given as bore in context, is a tidal phenomenon in which the leading edge of the incoming tide forms a wave of water that travels up a river or narrow bay reversing the direction of the river or bay's current.
The Tarn is a 380.2-kilometre (236.2 mi) long river in the administrative region of Occitanie in southern France. It is a right tributary of the Garonne.
Moissac is a commune in the Tarn-et-Garonne department in the Occitanie region in southern France. The town is situated at the confluence of the rivers Garonne and Tarn at the Canal de Garonne. Route nationale N113 was constructed through the town and between Valence-d'Agen and Castelsarrasin.
The Aquitanian people lived in the area of present-day southern Nouvelle-Aquitaine and southwestern Midi-Pyrénées, France - in the region between the Pyrenees, the Atlantic ocean, and the Garonne, in present-day southwestern France in the 1st century BCE. The Romans, dubbed this region Gallia Aquitania. Classical authors such as Julius Caesar and Strabo clearly distinguish the Aquitani from the other peoples of Gaul, and note their similarity to others in the Iberian Peninsula.
Podensac is a commune in the Gironde department. It is located in the famous Bordeaux wine region in Nouvelle-Aquitaine.
The Canal des Deux Mers has been used to describe two different but similar things since the 1660s. In some cases, it is used interchangeably with the Canal du Midi. In others, it describes the path from the Atlantic to the Mediterranean, of which the Canal du Midi was the first man-made component.
The Canal de Brienne is a French canal connecting the Garonne River with the Canal du Midi and the Canal de Garonne. It has two locks. The lock opening to the Garonne is known as Ecluse Saint-Pierre. The lock nearer to the Canal du Midi usually stands open.
Barbazan is a commune in the Haute-Garonne department in the Occitanie region of south-western France.
South West France, or in French Sud-Ouest, is a wine region in France covering several wine-producing areas situated respectively inland from, and south of, the wine region of Bordeaux. These areas, which have a total of 16,000 hectares of vineyards, consist of several discontinuous wine "islands" throughout the Aquitaine region, and more or less to the west of the Midi-Pyrénées region.
The Pont de pierre, or "Stone Bridge" in English, is a bridge in Bordeaux,, which connects the left bank of the Garonne River to the right bank quartier de la Bastide.
The Ponts Jumeaux is the point at which the Canal du Midi joins the Canal de Garonne and the River Garonne, via the Canal de Brienne. It was built in 1774 by Joseph-Marie de Saget, a civil engineer in the province of Languedoc in Toulouse.
The Dordogne is a river in south-central and southwest France. It is 483.1 km (300.2 mi) long. The Dordogne and its watershed were designated Biosphere Reserve by UNESCO on July 11 2012.
Nouvelle-Aquitaine or New Aquitaine, is the largest administrative region in France, spanning the west and southwest of the mainland. The region was created by the territorial reform of French regions in 2014 through the merger of three regions: Aquitaine, Limousin and Poitou-Charentes. It covers 84,036 km2 (32,446 sq mi) – or 1⁄8 of the country – and has 5,956,978 inhabitants. The new region was established on 1 January 2016, following the regional elections in December 2015.
GARUMNA (now Garonne), one of the chief rivers of Gaul, rises in the Pyrenees, flows northwest through Aquitania, and becomes a bay of the sea below Burdigala (now Bordeaux).
prouvant péremptoirement que la Garonne a sa vrai source et la plus importante dans les Monts Maudits, sur le versant Sud des Pyrénées ('proving conclusively that the Garonne has its true source, and the most important, in the Monts Maudits, on the southern slopes of the Pyrenees')