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See also:GARONNE (See also:Lat. Garumna) , a See also:river of See also:south-western See also:France, rising in the Maladetta See also:group of the See also:Pyrenees, and flowing in a wide See also:curve to the See also:Atlantic Ocean. It is formed by two torrents, one of which has a subterranean course of 22 m., disappearing in the sink known as the Trou du Taureau (" See also:bull's hole ") and reappearing at the Goueil de Joueou. After a course of 30 M. in See also:Spanish territory, during which it flows through the See also:fine See also:gorge called the Vallee d'See also:Aran, the Garonne enters France in the See also:department of Haute Garonne through the narrow See also:defile of the See also:Pont du Roi, and at once becomes navigable for rafts. At Montrejeau it receives on the See also:left the Neste, and encountering at this point the vast See also:plateau of Lannemezan is forced to turn abruptly See also:east, flowing in a wide curve to See also:Toulouse. At See also:Saint Martory it gives off the See also:irrigation See also:canal of that name. At this point the Garonne enters a fertile See also:plain, and supplies the See also:motive See also:power to several See also:mills. It is joined on the right by various streams fed by the snows of the Pyrenees. Such are the Salat, at whose confluence river See also:navigation proper begins, and the Arize and the See also:Ariege (both names signifying" river "). From Toulouse the Garonne flows to the See also:north-See also:west, now skirting the See also:northern border of the plateau of Lannemezan which here drains into it, the See also:principal streams being the See also:Save, the See also:Gera and the BaIse. On its right See also:hand the Garonne is swelled by its two See also:chief tributaries, the warn, near See also:Moissac, and the See also:Lot, below See also:Agen; farther down it is joined by the Drot (or Dropt), and on the left by the Ciron. Between Toulouse and Castets, 332 M. above See also:Bordeaux, and the highest point to which See also:ordinary See also:spring-tides ascend, the river is accompanied at a distance of from a 1 to 3 M. by the so-called " lateral canal " of the Garonne, constructed in 1838—1856. This canal is about 120 M. See also:long, or 133 M. including its branches, one of which runs off at right angles to See also:Montauban on the See also:Tarn. From Toulouse to Agen the See also:main canal follows the right See also:bank of the Garonne, See also:crossing the Tarn on an See also:aqueduct at Moissac, while another magnificent aqueduct of twenty-three See also:arches carries it at Agen from the right to the left bank of the river. It has a fall of 420 ft. and over fifty locks, and is navigable for vessels having the maximum dimensions of 981 ft. length, 19 ft. breadth and 62 ft. See also:draught. The carrying See also:trade upon it is chiefly in agricultural produce and provisions, See also:building materials, See also:wood and See also:industrial products. At Toulouse the canal connects with the Canal du Midi, which runs to the Mediterranean. After passing Castets the Garonne begins to widen out considerably, and from being 16o yds. broad at Agen increases to about 65o yds. at Bordeaux, its See also:great commercial See also:port. From here it flows with ever increasing width between two See also:flat shores to the Bec d'Ambes (152 m.), where, after a course of 357 m., it unites with the See also:Dordogne to See also:form the vast See also:estuary known as the See also:Gironde. The triangular See also:peninsula lying between these two great tidal See also:rivers is called Entre-deux-mers (" between two seas ") and is famous for its wines. The drainage See also:area of the Garonne is nearly 33,000 sq. m. Floods are of See also:common occurrence, and descend very suddenly. The most disastrous occurred in 1875, 1856 and in 1770, when the See also:flood level at Castets attained the See also:record height of 421 ft. above See also:low-See also:water See also:mark. Additional information and CommentsThere are no comments yet for this article.
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