The description of the physical, biological and human features of the river Charente and of the river Richelieu will reveal to us the elements that the two territories have in common, as well as their differences. ###>Par la description des éléments physiques, biologiques et humains du fleuve Charente et de la rivière Richelieu, nous prendrons connaissance des points communs et des différences géographiques des deux territoires.