The best-known whitewater rivers are Amazonian and have their source in the Andes.
Outside the Amazon, a small number of South American rivers are considered whitewater, most notably certain tributaries of the Orinoco (e.g., Guaviare, Meta and Apure Rivers) and Paraná-Paraguay (e.g., Bermejo and Salado Rivers) that have their source in the Andes [REF].