Japurá (Rio Yapurá) is a river that stretches 2,615 kilometers (or 1,625 miles) in length, draining from a 242,259 km2 basin in Brazil and Colombia.
Its average discharge rate is 6,000 m3/3 and the river flows out into Amazon River.
Negro is the 3rd largest river by average discharge rate in Brazil at 26,700 m3/s.
Negro is a river that is 2,250 kilometers (or 1,398 miles) long and drains from a 720,114 km2 drainage basin in Brazil, Venezuela and Colombia.
The average volume of water flow is 26,700 m3/3 and the river flows out into Amazon River.
More on the longest and largest river systems in the world: