Baïse

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Coordinates: 44°17′07″N 0°19′17″E / 44.28528°N 0.32139°E / 44.28528; 0.32139
Baïse
River
Canal bridge over the river
Canal bridge over the Baïse river
Country France
Regions Occitanie, Nouvelle-Aquitaine
Department Hautes-Pyrénées, Gers, Lot-et-Garonne
Communes Lannemezan, Trie-sur-Baïse, Mirande, Castéra-Verduzan, Valence-sur-Baïse, Condom, Nérac, Lavardac
Tributaries
 - left Gélise
 - right Baïsole, Petite Baïse, Auloue
City Auch
Source Pyrenees
 - location Plateau de Lannemezan, Occitanie, France
 - elevation 600 m (1,969 ft)
 - coordinates 43°06′17″N 0°21′20″E / 43.10472°N 0.35556°E / 43.10472; 0.35556
Mouth Garonne
 - location Saint-Léger, Nouvelle-Aquitaine, France
 - elevation 30 m (98 ft)
 - coordinates 44°17′07″N 0°19′17″E / 44.28528°N 0.32139°E / 44.28528; 0.32139
Length 188 km (117 mi)
Basin 2,910 km² (1,124 sq mi)
Discharge for Nérac
 - average 11.70 /s (413 cu ft/s)
Wikimedia Commons: Baïse

The Baïse or Grande Baïse (Occitan: Baïsa) is a French river that flows through the Hautes-Pyrénées, Gers and Lot-et-Garonne departments, in the Occitanie and Nouvelle-Aquitaine regions.

The river's source is in the Pyrenees and is a left tributary of the Garonne river. In general, it flows from south to north.

Geography[change | change source]

The Baïse river has a length of 187.7 km (116.6 mi) and a drainage basin with an area of 2,910 km2 (1,124 sq mi).[1]

Its average yearly discharge is 11.70 m3/s (413 cu ft/s) at Nérac, a small town of the Lot-et-Garonne department that is at about 20 km (12.4 mi) of the confluence with the Garonne river. The largest discharges are during winter and spring, with 23.00 m3/s (812 cu ft/s) in February.[2]

Average monthly discharge (m3/s) at Nérac

Course[change | change source]

The source of the Baïse is on the Plateau de Lannemezan, in the Capvern commune (Hautes-Pyrénées), at an altitude of about 600 m (1,969 ft).[3]

The Baïse flows through 2 regions, 3 departments and 52 communes. Some of the communes are:

Finally, it flows into the Garonne river at Saint-Léger (Lot-et-Garonne), at 30 m (98 ft) of altitude.[4]

Main tributaries[change | change source]

  • Left tributaries
    • Gélise - 92 km;[5]
  • Right tributaries
    • Baïsole - 47 km;[6]
    • Petite Baïse - 74.8 km;[7]
    • Auloue - 45.3 km;[8]

Gallery[change | change source]

Related pages[change | change source]

References[change | change source]

  1. "La Baïse (O6--0290)" (in French). SANDRE - Portail national d'accès aux référentiels sur l'eau. Retrieved 24 June 2014.
  2. "La Baïse à Nérac" (in French). Banque Hydro. Retrieved 25 April 2017.
  3. "Source de la Baïse" (in French). Géoportail. Retrieved 24 June 2014.
  4. "Confluence de la Baïse" (in French). Géoportail. Retrieved 24 June 2014.
  5. "La Gélise (O6--0330)" (in French). SANDRE - Portail national d'accès aux référentiels sur l'eau. Retrieved 24 June 2014.
  6. "La Baisole (O65-0400)" (in French). SANDRE - Portail national d'accès aux référentiels sur l'eau. Retrieved 24 June 2014.
  7. "La Baïse (O65-0430)" (in French). SANDRE - Portail national d'accès aux référentiels sur l'eau. Retrieved 24 June 2014.
  8. "L'Auloue (O66-0400)" (in French). SANDRE - Portail national d'accès aux référentiels sur l'eau. Retrieved 24 June 2014.

Other websites[change | change source]