Rouville topographic maps

Average elevation: 73 m

The average slope of the Richelieu River is 0.19 metres per kilometre (1.0 ft/mi), but 24 metres (79 ft) in elevation between Saint-Jean-sur-Richelieu and Chambly for an average flow of 330 cubic metres per second (12,000 ft3/s).

Average elevation: 69 m

Average elevation: 76 m

Average elevation: 19 m

Average elevation: 32 m

Average elevation: 37 m