Napo River

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Napo river
Napo River.jpg
The Napo River to the east of Coca
Naporivermap.png
Map of the Amazon Basin with the Napo River highlighted
Location
Countries
Physical characteristics
SourceCotopaxi in the Andes
 • locationEcuador
 • coordinates0°40′S 78°25′W / 0.667°S 78.417°W / -0.667; -78.417
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; -72.71750Coordinates: 3°27′28″S 72°43′3″W / 3.45778°S 72.71750°W / -3.45778; -72.71750
Length1,130 km (700 mi)[1]
Basin size103,307.79 km2 (39,887.36 sq mi) 101,415 km2 (39,157 sq mi)[2]
Discharge 
 • locationMazán (Bella Vista), Loreto Region, Peru - 79,76 km upstream of mouth (basin size 100,518 km2 (38,810 sq mi), 99,388 km2 (38,374 sq mi)[3]
 • average(Period: 1991-2009)6,660 m3/s (235,000 cu ft/s)[6]
 • minimum1,875 m3/s (66,200 cu ft/s)[4] 3,250 m3/s (115,000 cu ft/s)[5]
 • maximum13,020 m3/s (460,000 cu ft/s)[7] 11,200 m3/s (400,000 cu ft/s)[8]
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)[9] (Period: 2001-2005)5,700 m3/s (200,000 cu ft/s)[10]
Discharge 
 • locationNueva Rocafuerte, Ecuador - 574.1 km upstream of mouth (basin size 26,879.7 km2 (10,378.3 sq mi)[11] (Period: 2001-2005)2,227 m3/s (78,600 cu ft/s)[12]
 • average(Period: 2001-2009)2,031 m3/s (71,700 cu ft/s)
Basin features
Tributaries 
 • leftAguarico, Coca, Tamboyacu
 • rightYasuní, Tiputini, Curaray, Mazan

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 103,307.79 km2 (39,887.36 sq mi). The mean annual discharge is 6,660 m3/s (235,000 cu ft/s)[13] (Mazán).

Village along west bank of Napo River in Peru, a few miles above confluence with Amazon. The land visible beyond the waterway is an island in the river.

Geography[edit]

Before it reaches the plains it receives a great number of small streams from impenetrable, saturated and much broken mountainous districts, where the dense and varied vegetation seems to fight for every piece of ground. This river is one of Ecuador's Physical Features. From the north it is joined by the Coca River, having its sources in the gorges of Cayambe volcano on the equator, and also a powerful river, the Aguarico having its headwaters between Cayambe and the Colombia frontier. From the west, it receives a secondary tributary, the Curaray, from the Andean slopes, between Cotopaxi and the Tungurahua volcano. From its Coca branch to the mouth of the Curaray the Napo is full of snags and shelving sandbanks and throws out numerous canoes among jungle-tangled islands, which in the wet season are flooded, giving the river an immense width. From the Coca to the Amazon it runs through a forested plain where not a hill is visible from the river - its uniformly level banks being only interrupted by swamps and lagoons. From the Amazon the Napo is navigable for river craft up to its Curaray branch, a distance of about 216 mi (348 km), and perhaps a bit further; thence, by painful canoe navigation, its upper waters may be ascended as far as Santa Rosa, the usual point of embarkation for any venturesome traveller who descends from the Quito tableland. The Coca river may be penetrated as far up as its middle course, where it is jammed between two mountain walls, in a deep canyon, along which it dashes over high falls and numerous reefs. This is the stream made famous by the expedition of Gonzalo Pizarro.

Tributary[edit]

Napobasin01.png
The Napo river tributary

Drainge basin[edit]

The Napo river basin size
Napobasinsize.png

Discharge[edit]

Napo River at Bellavista (km ~79,8 km) multiannual average (Qmean), dominante (Qdominante) discharge m3/s and sediment load (S) ton/year (1991-2009)
Period of data Qmean Smean Qdominante
1991/1992 5667 28,608 6009
1992/1993 7104 47,718 7447
1993/1994 8013 67,159 8583
1994/1995 6055 34,801 6525
1995/1996 5956 34,017 6463
1996/1997 6262 38,258 6790
1997/1998 9839 105,956 10354
1998/1999 6839 51,48 7686
1999/2000 6725 49,735 7576
2000/2001 6452 38,527 6810
2001/2002 5979 32,431 6335
2002/2003 5669 32,154 6312
2003/2004 6148 41,916 7054
2004/2005 6456 37,953 6767
2005/2006 6143 34,77 6523
2006/2007 6535 40,344 6942
2007/2008 6615 40,832 6977
2008/2009 7428 52,504 7749
1991-2009 6660 44,953 7161

References:

Estudio Binacional de Navegabilidad del Río Napo (Ecuador-Perú)

Napo River at Bellavista (km ~79,8) mean annual (Qmean), maximum (Qmax), minimum (Qmin) discharge (2011-2012) and multiannual average (Qnormal) discharge (1969-2011) m3/s
Qmean Qmax Qmin Qnormal
Sep 4551,3 5441 3757 5121,2
Oct 5344,9 6995 2894 4898,6
Nov 4427 6878 3023 5595,1
Dec 6536,8 9160 5205 5660,6
Jan 7998,7 9501 4868 4580,7
Feb 6536,8 8302 5155 4386,9
Mar 9557,2 12150 5417 5824,1
Apr 11843,7 12230 10870 7502,4
May 10322,7 10790 9702 8941,3
Jun 8878,8 9961 7011 9422,9
Jul 8189,3 9228 7197 8844,7
Aug 5182 7605 3975 6612,4
Average 7447,4 9020 5756 6449,2

References:

Boletin extraordinario de la evaluación hidrológica y pluviométrica en la cuenca amazónica peruana (Senamhi, 2012)

Napo River at Bellavista (km ~79,8) mean annual (Qmean), maximum (Qmax), minimum (Qmin) discharge (2012-2013) and multiannual average (Qnormal) discharge (1969-2012) m3/s
Qmean Qmax Qmin Qnormal
Sep 5037 7822 3249 5096
Oct 5113 6457 4632 4918
Nov 4130 5660 3102 5567
Dec 4755 6838 3568 5698
Jan 7589 9183 3854 4723
Feb 5851 9071 4170 4465
Mar 10060 10740 9127 5973
Apr 9405 10610 8675 7683
May 8322 10570 6932 8999
Jun 10495 11230 9743 9400
Jul 9675 10410 8402 8817
Aug 9001 9776 8386 6551
Average 7452,7 9030 6153 6490,8

References:

Boletin extraordinario de la evaluación hidrológica y pluviométrica en la cuenca amazónica peruana (Senamhi, 2013)

Napo River at Bellavista (km ~79,8) mean annual and multiannual average discharge
Period of data Multiannual average discharge References
1930-2006 *6,464 m3/s (228,300 cu ft/s) Evaluación hidrológica de las cuencas amazonicas peruanas (HiBam/Senamhi/IRD, octubre 2011)
1989-2010 6,360 m3/s (225,000 cu ft/s); Q-dominante 6,865 m3/s (242,400 cu ft/s) Hydrodinamic and sediment transport modelling in a bend of Napo amazonian river: Morphodynamics and infrastructure implications (IAHR, 2015)
1991-2009 6,660 m3/s (235,000 cu ft/s) Estudio Binacional de Navegabilidad del Río Napo (Ecuador-Perú)
2000-2011 6,461 m3/s (228,200 cu ft/s) Línea Base Ambiental (Lahmeyer Agua Energia S.A.)
2001-2012 6,758 m3/s (238,700 cu ft/s) Preliminary Analysis of Potential for River Hydrokinetic Energy Technologies in the Amazon Basin
2001-2009 **6,369 m3/s (224,900 cu ft/s) Estudio Binacional de Navegabilidad del Río Napo (Ecuador-Perú)
2003-2009 6,855 m3/s (242,100 cu ft/s); Q-min 1,875 m3/s (66,200 cu ft/s); Q-max 13,020 m3/s (460,000 cu ft/s) Modelado hidrologico distribuido de la Cuenca Amazonica Peruana utilizando preciptación obtenida por satelite, 2013
2004-2010 6,609 m3/s (233,400 cu ft/s) Suspended sediment dynamics in the Amazon River of Peru
2001-2005 6,976 m3/s (246,400 cu ft/s) Sediment budget of the Napo River, Amazon basin, Ecuador and Peru
2004-2006 6,267 m3/s (221,300 cu ft/s) Sediment budget of the Napo River, Amazon basin, Ecuador and Peru
2016-2017 9,338 m3/s (329,800 cu ft/s); Q-min 4,654 m3/s (164,400 cu ft/s); Q-max 13,200 m3/s (470,000 cu ft/s) Hydrological modeling of the Peruvian-Ecuadorian Amazon Basin using GPM-IMERG satellite-based precipitation dataset (2017)
***8,936 m3/s (315,600 cu ft/s) Inventario y evaluación nacional de aguas superficiales (ONERN, 1980)

*Confluence of Amazon River 6,611 m3/s (period 1930-2006) **Confluence of Amazon River ~6,500 m3/s (period 2001-2009) ***A.J. Amazonas

See also[edit]

References[edit]

  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. ^ (PDF) http://www.minem.gob.pe/minem/archivos/6_1%2520-%25206_%2520Linea%2520Ambiental.pdf. Missing or empty |title= (help)
  3. ^ (PDF) http://www.minem.gob.pe/minem/archivos/6_1%2520-%25206_%2520Linea%2520Ambiental.pdf. Missing or empty |title= (help)
  4. ^ https://repositorio.igp.gob.pe/handle/20.500.12816/956. Missing or empty |title= (help)
  5. ^ https://es.scribd.com/document/244534094/TESIS-ENTORNO-HDIRICO-PUERTO-MAZAN-RIO-NAPO-pdf. Missing or empty |title= (help)
  6. ^ https://www.academia.edu/10462866/Estudio_Binacional_de_Navegabilidad_del_r%C3%ADo_Napo. Missing or empty |title= (help)
  7. ^ https://repositorio.igp.gob.pe/handle/20.500.12816/956. Missing or empty |title= (help)
  8. ^ https://es.scribd.com/document/244534094/TESIS-ENTORNO-HDIRICO-PUERTO-MAZAN-RIO-NAPO-pdf. Missing or empty |title= (help)
  9. ^ (PDF) http://www.minem.gob.pe/minem/archivos/6_1%2520-%25206_%2520Linea%2520Ambiental.pdf. Missing or empty |title= (help)
  10. ^ https://www.academia.edu/2099322/Sediment_budget_of_the_Napo_River_Amazon_basin_Ecuador_and_Peru. Missing or empty |title= (help)
  11. ^ (PDF) https://portal.mtc.gob.pe/transportes/acuatico/documentos/estudios/03%2520-%2520Navegabilidad%2520Rio%2520Napo%2520-%2520Inf%2520Fin%2520-%2520Vol%2520III%2520-%2520Hidraulica%2520Fluvial.pdf. Missing or empty |title= (help)
  12. ^ https://www.academia.edu/2099322/Sediment_budget_of_the_Napo_River_Amazon_basin_Ecuador_and_Peru. Missing or empty |title= (help)
  13. ^ (PDF) https://portal.mtc.gob.pe/transportes/acuatico/documentos/estudios/03%2520-%2520Navegabilidad%2520Rio%2520Napo%2520-%2520Inf%2520Fin%2520-%2520Vol%2520III%2520-%2520Hidraulica%2520Fluvial.pdf. Missing or empty |title= (help)