Which is the most important river in Santiago?

The Mapocho River: A Vital Water Source

The Mapocho River is a significant waterway that runs through the heart of central Santiago, serving as one of its tributaries. Originating from the western slopes of the Maipo volcano in the Andes, this river plays a crucial role in the region. Furthermore, the Maipo River is the primary provider of irrigation and drinking water for the area.