Posts Tagged ‘amazon river source’

SI Research Notes: Where does the Amazon Really Begin?

Thursday, February 19th, 2009

The mighty Amazon River runs over 4,000 miles from the Peruvian Andes through Brazil to the Atlantic Ocean. A historical definition of the “source” of a river is the point at which water must flow the greatest distance to flow into the river. However, finding the ultimate “source” of a great river can be problematic.

The most distant sources of the River lie in southern Peru. The Rio Lloqueta, a small river in the Andes Mountains, is located about 130 kilometers north of the city of Arequipa in southern Peru. The five main tributaries of the Lloquetanamed Carhuasanta, Sillanque, Apacheta, Calomarco, and Ccaccansareach almost to the summits of the continental divide. The peaks include Nevado Mismi Mountain. Land use in the Rio Lloqueta basin is seasonal and limited to grazing alpacas and llamas.

In 2000, research teams coordinated by Andrew Johnston of the Center for Earth and Planetary Studies (CEPS) at the Smithsonian Institution’s National Air and Space Museum (NASM) surveyed the area of the Lloqueta River. (more…)