Чёрная гора
In 1660, Riquet found the solution to the main problem: the water supply to the summit point to feed both sides of the canal. His idea was to get water flowing from the Montagne Noire. His important knowledge of the hydrography of the Montagne Noire and Sor allowed him to imagine an ingenious irrigation system. He was inspired by the French engineer Adam de Craponne who had implemented the same system for the Craponne Canal.