Mamore River
Confluence of the Ivirgarzama River and the Ichilo River , and of the Chimore River and the Ichilo River to the Mamore River (north is to the upper right corner of this ISS image)
Map of the Amazon Basin with the Mamore River highlighted
Location
Country	Brazil , Bolivia
Physical characteristics
Source	Sierra de Cochabamba
• location	Pojo , Bolivia
• coordinates	17°37′59″S 64°56′02″W  /  17.633°S 64.934°W  / -17.633; -64.934
• elevation	3,372 m (11,063 ft)
Mouth	Madeira River
• location	near Vila Murtinho, Brazil/Bolivia border
• coordinates	10°22′59″S 65°23′35″W  /  10.383°S 65.393°W  / -10.383; -65.393
• elevation	110 m (360 ft)
Length	1,930 km (1,200 mi) [1]
Basin size	637,401.1 km 2 (246,101.9 sq mi) [2]
Discharge
• location	Near mouth
• average	(Period: 1985?2013)8,150 m 3 /s (288,000 cu ft/s) [3] (Period: 1971?2000)8,857.3 m 3 /s (312,790 cu ft/s) [2]
Discharge
• location	Guayaramerin (Basin size: 611,800 km 2 (236,200 sq mi)
• average	(Period: 1985?2013)7,650 m 3 /s (270,000 cu ft/s) [3] (Period: 1971?2000)8,414.5 m 3 /s (297,160 cu ft/s) [2]
• minimum	(Period: 1985?2013)1,660 m 3 /s (59,000 cu ft/s) [3]
• maximum	(Period: 1985?2013)15,200 m 3 /s (540,000 cu ft/s) [3]
Discharge
• location	Puerto Siles (Basin size: 229,300 km 2 (88,500 sq mi)
• average	(Period: 1985?2013)4,600 m 3 /s (160,000 cu ft/s) [3]
• minimum	(Period: 1985?2013)1,180 m 3 /s (42,000 cu ft/s) [3]
• maximum	(Period: 1985?2013)8,850 m 3 /s (313,000 cu ft/s) [3]
Discharge
• location	Camiaco (Basin size: 128,800 km 2 (49,700 sq mi)
• average	(Period: 1985?2013)2,180 m 3 /s (77,000 cu ft/s) [3]
• minimum	(Period: 1985?2013)750 m 3 /s (26,000 cu ft/s) [3]
• maximum	(Period: 1985?2013)3,900 m 3 /s (140,000 cu ft/s) [3]
Basin features
Progression	Madeira → Amazon → Atlantic Ocean
River system	Amazon
Tributaries
• left	Chapare , Isiboro , Apere , Yacuma , San Miguel , Yata
• right	Rio Grande , Ibare , Guapore , Pacaas Novo

The Mamore is a large river in Brazil and Bolivia which unites with the Madre de Dios River to form the Madeira , one of the largest tributaries of the Amazon . It rises on the northern slope of the Sierra de Cochabamba, east of the city of Cochabamba , and is known as the Chimore down to its junction with the Chapare . Its larger tributaries are the Chapare , Secure , Apere , and Yacuma from the west, and the Ichilo , Guapay , Ivari, Manique and Guapore from the east. Taking into account its length only, the Guapay should be considered the upper part of the Mamore; but it is shallow and obstructed, and carries a much smaller volume of water. The Guapore also rivals the Mamore in length and volume, having its source in the Parecis plateau , Mato Grosso , Brazil, a few miles from streams flowing north-ward to the Tapajos and Amazon, and southward to the Paraguay and Parana rivers. The Mamore is interrupted by rapids a few miles above its junction with the Beni, but a railway 300 km long has been undertaken from below the rapids of the Madeira. Above the rapids the river is navigable to Chimore , at the foot of the sierra, and most of its tributaries are navigable for long distances. In 1874, Franz Keller gave the outflow of the Mamore at mean water level, and not including the Guapore, as 41,459 cm ³ /sec (2,530 cub. in. per second), and the area of its drainage basin , also not including the Guapore, as 24,299 km ² (9,382 square miles). ^[4]

An extensive pre-Columbian civilization existed in the basin of the Mamore in the swampy area known as the Llanos de Moxos , in northeastern Bolivia.

See also [ edit ]

• Mamore?Guapore linguistic area

References [ edit ]

•   This article incorporates text from a publication now in the public domain :  Chisholm, Hugh , ed. (1911). " Mamore ". Encyclopædia Britannica (11th ed.). Cambridge University Press.
• Edward D. Mathews, Up the Amazon and Madeira Rivers (London, 1879).

10°23′S 65°23′W  /  10.383°S 65.383°W  / -10.383; -65.383