The most remarkable inundations were those of 1537 and 1740; in the former year the water rose to 8 ft.
The mines suffered greatly from inundations in 1868 and 1879, and the soil on which the town is built shows signs of subsidence.
recently upheaved from the sea were spread at low levels with alternate inundations of salt and fresh water.
The city, said to be the "Eden" of Charles Dickens's Martin Chuzzlewit, is built on a tongue of land between the rivers, and has suffered many times from inundations, notably in 1858.
The valley in which the town is situated used to be subject to inundations, but in 1805 a tunnel was constructed by means of which the surplus waters of the Bied are carried into the Doubs.