Note 349 — Chapter IV
Reading edition
The Drac, a torrent emptying into the Isère a little below Grenoble, has discharged 5,200, the Isère, which receives it, 7,800 cubic yards, and the Durance an equal quantity, per second.—Montluisant, Note sur les Desséchements, etc., Annales des Ponts et Chaussées, 1833, 2me sémestre, p. 288.
The floods of some other French rivers scarcely fall behind those of the Rhone. The Loire, above Roanne, has a basin of 2,471 square miles, or about twice and a half the area of that of the Ardèche. In some of its inundations it has delivered above 9,500 cubic yards per second.—Belgrand, De l'Influence des Forêts, etc., Annales des Ponts et Chaussées, 1854, 1er sémestre, p. 15, note.