Two large rivers that feed directly into the Amazon are the Rio Negro and the Madeira River. The Rio Negro meets the Amazon near Manaus, Brazil, while the Madeira River joins the Amazon in the western part of the Amazon Rainforest.
A tributary or affluent is a stream or river that flows into a main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the Main stem river serve to drain the surrounding drainage basin of its surface water and groundwater by leading the water out into an ocean or sea.
Rivers
Chindwin and Irrawaddy Rivers.
Tributaries
Small streams and rivers that flow into larger ones are called tributaries. A tributary does not flow directly into a sea or ocean.
Brazil, Bolivia, Colombia, Ecuador, Peru and Venezuela
Primary producers feed directly on autotrophs (plants). These are mainly herbivores like cow & deer
The Rio Grande and other rivers dry up before reaching the sea because humans take so much water from them. Some rivers may also dry up naturally, or drain into a salt lake with no ocean connection.
The Missouri and the Ohio rivers are the two major rivers that merge into the Mississippi.
Five Major RiversSusquehannaPotomacRappahannockYorkJames
Meurthe or Saar are two rivers that feed into the Moselle