In the 1930s attention turned to the headwaters of the Apurímac River.In 1935, Lake Vilafro (), located at an altitude of 4,674 metres (15,335 ft) was identified as the main source of the Amazon In 1969, Carlos Peñaherrera del Aguila, a prominent Peruvian geographer, was the first to label the Carhuasanta River (and the Lloqueta River) flowing down the Mismi Mountain in southern Peru …

The Mochuan River (Chinese: 漠川河) is a right-bank tributary of the upper Xiang River in Xin'an County, Guangxi, China.The river rises in the west of Panhuang Temple (Chinese: 盘皇殿) in Mochuan Township (Chinese: 漠川乡) and flows south to north, joining the Xiang at Qukou (Chinese: 渠口) of Yujiang Village (Chinese: 渔江村), Xiangli Town (Chinese: 湘漓镇).