Jean Aubert was a French engineer. In 1961, he used the idea of the German engineer Julius Greve from the last century to describe a pente d'eau (), which was a way of moving boats up the gradient of a canal without locks. The design consisted of a sloping channel, through which a wedge of water on which the boat was floating could be pushed up an incline. This concept was used in both the Montech water slope and the Fonserannes water slopes.
David Tew, 1984, Canal Inclines and Lifts, Gloucester: Alan Sutton.