Napo River

Napo river
The Napo River to the east of Coca
Map of the Amazon Basin with the Napo River highlighted
Location
Countries
Physical characteristics
Source 
 • locationConfluence of Jatunyaçu and Anzu, Ecuador
 • coordinates1°2′48.6204″S 77°48′27.4392″W / 1.046839000°S 77.807622000°W / -1.046839000; -77.807622000
 • elevation430 m (1,410 ft)
2nd source 
 • locationJatunyaçu–Verdeyaçu, Andes, Ecuador
 • coordinates0°38′22.6248″S 78°3′29.1924″W / 0.639618000°S 78.058109000°W / -0.639618000; -78.058109000
 • elevation3,419 m (11,217 ft)
3rd source 
 • locationJatunyaçu–Mulatos, Andes, Ecuador
 • coordinates0°53′55.0464″S 78°24′32.8824″W / 0.898624000°S 78.409134000°W / -0.898624000; -78.409134000
 • elevation3,871 m (12,700 ft)
4th source 
 • locationAnzu River, Andes, Ecuador
 • coordinates1°23′30.408″S 78°4′48.7668″W / 1.39178000°S 78.080213000°W / -1.39178000; -78.080213000
 • elevation1,430 m (4,690 ft)
MouthAmazon River
 • location
70 km (43 mi) downstream from Iquitos, Loreto Region, Peru
 • coordinates
3°27′28″S 72°43′3″W / 3.45778°S 72.71750°W / -3.45778; -72.71750
 • elevation
78 m (256 ft)
Length1,130 km (700 mi)[1]
Basin size103,307.79 km2 (39,887.36 sq mi)[2]
Discharge 
 • locationFrancisco de Orellana, Maynas, Loreto Region (near mouth)
 • average(Period: 1971–2000)7,147.8 m3/s (252,420 cu ft/s)[2]
 • minimum3,200 m3/s (110,000 cu ft/s)[3]
 • maximum10,800 m3/s (380,000 cu ft/s)[3]
Discharge 
 • locationMazán (Bella Vista), Loreto Region, Peru - 79,76 km upstream of mouth (basin size 100,518 km2 (38,810 sq mi)[4]
 • average(Period: 1991–2009)6,660 m3/s (235,000 cu ft/s)[6] (Period: 1991/09–2023/08)7,000 m3/s (250,000 cu ft/s)[5]
 • minimumMNQ (average): 3,250 m3/s (115,000 cu ft/s) NNQ (minimum): 498.6 m3/s (17,610 cu ft/s)(2016/02)[5]
 • maximumMHQ (average): 11,200 m3/s (400,000 cu ft/s) HHQ (maximum) 15,820 m3/s (559,000 cu ft/s)(2015/07), 15,200 m3/s (540,000 cu ft/s)(2023/04)[5]
Discharge 
 • locationSanta Clotilde, Maynas, Loreto Region, Peru - 256.2 km upstream of mouth (basin size 85,770 km2 (33,120 sq mi)
 • average(Period: 2002–2011)5,895 m3/s (208,200 cu ft/s)[4]
Discharge 
 • locationNueva Rocafuerte, Ecuador - 574.1 km upstream of mouth (basin size 26,879.7 km2 (10,378.3 sq mi)[6]
 • average(Period: 2001–2009)2,032 m3/s (71,800 cu ft/s)[4]
Discharge 
 • locationPuerto Francisco de Orellana, Ecuador - 782 km upstream of mouth (basin size: 12,343 km2 (4,766 sq mi)
 • average(Period: 2001–2009)1,105 m3/s (39,000 cu ft/s)[4]
Basin features
ProgressionAmazonAtlantic Ocean
River systemAmazon
Tributaries 
 • leftJatunyaçu, Misahualli, Payamino, Coca, Aguarico, Tamboyaçu
 • rightAnzu, Llocullón, Tiputini, Yasuní, Anahiri, Curaray, Tacshacuraray, Mazán

The Napo River (Spanish: Río Napo) is a tributary to the Amazon River that rises in Ecuador on the flanks of the east Andean volcanoes of Antisana, Sincholagua and Cotopaxi.

The total length is 1,075 km (668 mi). The river drains an area of ca 103,000 km2. The mean annual discharge at Mazán 6,660 m3/s (235,000 cu ft/s).[7][6]

  1. ^ Ziesler, R.; Ardizzone, G.D. (1979). "Amazon River System". The Inland waters of Latin America. Food and Agriculture Organization of the United Nations. ISBN 92-5-000780-9. Archived from the original on 8 November 2014.
  2. ^ a b "Amazon".
  3. ^ a b Charles J., Vörösmarty; Berrien, Moore; Annette L., Grace; M. Patricia, Gildea (1989). CONTINENTAL SCALE MODELS OF WATER BALANCE AND FLUVIAL TRANSPORT: AN APPLICATIONS TO SOUTH AMERICA (PDF). Vol. 3. p. 241-265.
  4. ^ a b c d "6_1-6_Linea Ambiental" (PDF). Archived from the original (PDF) on 2014-06-07. Retrieved 2021-10-15.
  5. ^ a b c "Reportes hidrológicos". Archived from the original on 2023-10-03. Retrieved 2023-10-03.
  6. ^ a b c ESTUDIO BINACIONAL DE NAVEGABILIDAD DEL RÍO NAPO (PDF). 2010.
  7. ^ Christophoul, Frédéric (January 2009). "Sediment budget of the Napo River, Amazon basin, Ecuador and Peru". www.academia.edu Hydrological …, 2009.

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