Slightly more than twelve miles (20 km) long, the Rivière Blanche is the second largest river in Martinique - behind the Lézarde of which it is a tributary - but the first in terms of flow. This river with an oceanic rainfall regime flows in the center of the island parallel to the Lézarde. It rises on the side of Piton Lacroix (Pitons du Carbet) around 3,280 ft (1,000 m) above sea level and flows at the level of the Jonction habitation in Saint-Joseph at 127 ft (39 m) above sea level after crossing the natural site of Cœur Bouliki (photo). Thanks to a water tower and several collection stations, it contributes to the water supply of Fort-de-France.