The most important tributaries of the area are the Meta, Guaviare, Inirida and Vichada Rivers. Their overall contribution has been estimated at around 15,000 m/s, accounting for nearly 50% of the Orinoco River's total flow to the Atlantic Ocean.
Los afluentes más importantes sobre dicha zona son los ríos Meta, Guaviare, Inírida y Vichada, cuya contribución ha sido estimada en aproximadamente 15.000 m/s, representando casi el 50% del caudal total del Orinoco al océano Atlántico.