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Napo River

{{short description|River of Ecuador}}

{{Infobox river

| name = Napo river

| name_native =

| name_native_lang =

| name_other =

| name_etymology =

| image = Napo River.jpg

| image_size = 250

| image_caption = The Napo River to the east of Coca

| map = Naporivermap.png

| map_size = 250

| map_caption = Map of the Amazon Basin with the Napo River highlighted

| pushpin_map =

| pushpin_map_size = 250

| pushpin_map_caption=

| subdivision_type1 = Countries

| subdivision_name1 = {{hlist|Ecuador|Peru}}

| subdivision_type2 =

| subdivision_name2 =

| subdivision_type3 =

| subdivision_name3 =

| subdivision_type4 =

| subdivision_name4 =

| subdivision_type5 =

| subdivision_name5 =

| length = {{cvt|1,130|km|mi|abbr=on}}{{cite book |last1=Ziesler |first1=R. |last2=Ardizzone |first2=G.D. |title=The Inland waters of Latin America |year=1979 |url=http://www.fao.org/docrep/008/ad770b/AD770B05.htm |publisher=Food and Agriculture Organization of the United Nations |isbn=92-5-000780-9 |chapter=Amazon River System |archive-url=https://web.archive.org/web/20141108152358/http://www.fao.org/docrep/008/ad770b/AD770B05.htm |archive-date=8 November 2014 |url-status=live}}

| width_min =

| width_avg =

| width_max =

| depth_min =

| depth_avg =

| depth_max =

| discharge1_location=Francisco de Orellana (near mouth)

| discharge1_min ={{cvt|3,200|m3/s|cuft/s|abbr=on}}{{cite book|last1=Charles J.|first1=Vörösmarty|last2=Berrien|first2=Moore|last3=Annette L.|first3=Grace|last4=M. Patricia|first4=Gildea|url=https://gmao.gsfc.nasa.gov/gmaoftp/sarith/ROUTING_MODEL/docs/Vorosmarty_1989.pdf|title=CONTINENTAL SCALE MODELS OF WATER BALANCE AND FLUVIAL TRANSPORT: AN APPLICATIONS TO SOUTH AMERICA|volume=3|page=241-265|year=1989}}

| discharge1_avg =(Period: 1971–2000){{cvt|7,147.8|m3/s|cuft/s|abbr=on}}{{cite web|url=https://www.riversnetwork.org/V1/index.php/component/content/?view=article&id=43&catid=191&Itemid=179|title=Amazon}}

| discharge1_max = {{cvt|10,800|m3/s|cuft/s|abbr=on}}{{cite book|last1=Charles J.|first1=Vörösmarty|last2=Berrien|first2=Moore|last3=Annette L.|first3=Grace|last4=M. Patricia|first4=Gildea|url=https://gmao.gsfc.nasa.gov/gmaoftp/sarith/ROUTING_MODEL/docs/Vorosmarty_1989.pdf|title=CONTINENTAL SCALE MODELS OF WATER BALANCE AND FLUVIAL TRANSPORT: AN APPLICATIONS TO SOUTH AMERICA|volume=3|page=241-265|year=1989}}

| source1 =

| source1_location =Confluence of Jatunyaçu and Anzu, Ecuador

| source1_coordinates= {{coord|1|2|48.6204|S|77|48|27.4392|W}}

| source1_elevation = {{cvt|430|m|abbr=on}}

| source2 =

| source2_location = Jatunyaçu–Verdeyaçu, Andes, Ecuador

| source2_coordinates={{coord|0|38|22.6248|S|78|3|29.1924|W}}

| source2_elevation ={{cvt|3,419|m|abbr=on}}

| source3 =

| source3_location =Jatunyaçu–Mulatos, Andes, Ecuador

| source3_coordinates={{coord|0|53|55.0464|S|78|24|32.8824|W}}

| source3_elevation ={{cvt|3,871|m|abbr=on}}

| source4 =

| source4_location =Anzu River, Andes, Ecuador

| source4_coordinates={{coord|1|23|30.408|S|78|4|48.7668|W}}

| source4_elevation ={{cvt|1,430|m|abbr=on}}

| mouth = Amazon River

| mouth_location = {{cvt|70|km|mi|abbr=on}} downstream from Iquitos, Loreto Region, Peru

| mouth_coordinates = {{coord|3|27|28|S|72|43|3|W|display=inline,title}}

| mouth_elevation = {{cvt|78|m|abbr=on}}

| progression = Amazon → Atlantic Ocean

| river_system = Amazon River

| basin_size = {{cvt|103,307.79|km2|mi2|abbr=on}}{{cite web|url=https://www.riversnetwork.org/V1/index.php/component/content/?view=article&id=43&catid=191&Itemid=179|title=Amazon}}

| tributaries_left = Jatunyaçu, Misahualli, Payamino, Coca, Aguarico, Tamboyaçu

| tributaries_right = Anzu, Llocullón, Tiputini, Yasuní, Anahiri, Curaray, Tacshacuraray, Mazán

| custom_label =

| custom_data =

| extra =

|discharge2_location=Mazán (Bella Vista)

|discharge2_avg=(Period: 1991–2023){{cvt|7,000|m3/s|cuft/s|abbr=on}}{{cite web|url=https://www.gob.pe/institucion/senamhi/tema/reportes-hidrologicos|title=Reportes hidrológicos|access-date=2023-10-03|archive-date=2023-10-03|archive-url=https://web.archive.org/web/20231003234604/https://www.gob.pe/institucion/senamhi/tema/reportes-hidrologicos|url-status=live}}

|discharge3_location=Santa Clotilde

|discharge3_avg=(Period: 2002–2011){{cvt|5,895|m3/s|cuft/s|abbr=on}}{{cite web |url=http://www.minem.gob.pe/minem/archivos/6_1%2520-%25206_%2520Linea%2520Ambiental.pdf |title=6_1-6_Linea Ambiental |access-date=2021-10-15 |archive-date=2014-06-07 |archive-url=https://web.archive.org/web/20140607005732/http://www.minem.gob.pe/minem/archivos/6_1%20-%206_%20Linea%20Ambiental.pdf |url-status=dead }}

|discharge5_location=Puerto Francisco de Orellana

|discharge5_avg =(Period: 2001–2009){{cvt|1,105|m3/s|cuft/s|abbr=on}}{{cite web |url=http://www.minem.gob.pe/minem/archivos/6_1%2520-%25206_%2520Linea%2520Ambiental.pdf |title=6_1-6_Linea Ambiental |access-date=2021-10-15 |archive-date=2014-06-07 |archive-url=https://web.archive.org/web/20140607005732/http://www.minem.gob.pe/minem/archivos/6_1%20-%206_%20Linea%20Ambiental.pdf |url-status=dead }}

|discharge4_location=Nueva Rocafuerte

|discharge4_avg=(Period: 2001–2009){{cvt|2,032|m3/s|cuft/s|abbr=on}}{{cite web |url=http://www.minem.gob.pe/minem/archivos/6_1%2520-%25206_%2520Linea%2520Ambiental.pdf |title=6_1-6_Linea Ambiental |access-date=2021-10-15 |archive-date=2014-06-07 |archive-url=https://web.archive.org/web/20140607005732/http://www.minem.gob.pe/minem/archivos/6_1%20-%206_%20Linea%20Ambiental.pdf |url-status=dead }}

|discharge2_min={{cvt|3,250|m3/s|cuft/s|abbr=on}}{{cite web|url=https://www.gob.pe/institucion/senamhi/tema/reportes-hidrologicos|title=Reportes hidrológicos|access-date=2023-10-03|archive-date=2023-10-03|archive-url=https://web.archive.org/web/20231003234604/https://www.gob.pe/institucion/senamhi/tema/reportes-hidrologicos|url-status=live}}

|discharge2_max={{cvt|11,200|m3/s|cuft/s|abbr=on}}{{cite web|url=https://www.gob.pe/institucion/senamhi/tema/reportes-hidrologicos|title=Reportes hidrológicos|access-date=2023-10-03|archive-date=2023-10-03|archive-url=https://web.archive.org/web/20231003234604/https://www.gob.pe/institucion/senamhi/tema/reportes-hidrologicos|url-status=live}}}}

The Napo River ({{langx|es|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 {{cvt|1,075|km|mi|abbr=on}}. The river drains an area of ca 103,000 km2. The mean annual discharge at Mazán {{cvt|6,800|m3/s|cuft/s|abbr=on}}.{{cite journal|journal= Proceedings of the National Academy of Sciences|title=The Andes–Amazon–Atlantic pathway: A foundational hydroclimate system for social–ecological system sustainability|last1=Claire|first1=F. Beveridge|last2=Jhan-Carlo|first2=Espinoza|last3=Simone|first3=Athayde|last4=Sandra|first4=Bibiana Correa|last5=Thiago|first5=B. A. Couto|last6=Sebastian|first6=A. Heilpern|last7=Clinton|first7=N. Jenkins|last8=Natalia|first8=C. Piland|last9=Renata|first9=Utsunomiya|last10=Sly|first10=Wongchuig|last11=Elizabeth|first11=P. Anderson|doi=10.1073/pnas.2306229121|volume=121|date=2024|issue=22 |pages=e2306229121 |pmid=38722826 |pmc=11145265|bibcode=2024PNAS..12106229B }}{{cite web|url=https://www.academia.edu/2099322 |title=Sediment budget of the Napo River, Amazon basin, Ecuador and Peru |work=www.academia.edu Hydrological …, 2009|date=January 2009 |last1=Christophoul |first1=Frédéric }}{{cite book|url=https://portal.mtc.gob.pe/transportes/acuatico/documentos/estudios/03%20-%20Navegabilidad%20Rio%20Napo%20-%20Inf%20Fin%20-%20Vol%20III%20-%20Hidraulica%20Fluvial.pdf|title=ESTUDIO BINACIONAL DE NAVEGABILIDAD DEL RÍO NAPO|year=2010}}

Geography

Image:NapoVillagePeru02-02.jpg

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. 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 {{convert|216|mi|km|abbr=on}}, 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 the Spanish conquistador Gonzalo Pizarro.

Hydrometric stations on the Napo River:

class="wikitable" style="text-align:center;"

! rowspan="2" | Station

! rowspan="2" |River kilometer (rkm)

! rowspan="2" |Elevation (m)

! rowspan="2" |Drainage basin

(km2)

! colspan="2" |Average discharge

(m3/s)

{{cite web|url=https://www.hydrosheds.org|title=Hydro-SHEDS}}{{cite web|url=https://www.riversnetwork.org/V1/index.php/component/content/?view=article&id=43&catid=191&Itemid=179|title=Amazon}}

! {{cite web|url=https://hybam.obs-mip.fr|title=SO-HYBAM}}

colspan="6" |Lower Napo
Francisco de Orellana

|0

|78

|103,307.79

|7,147.8

|6,611

Mazán

|79.76

|85

|100,518

|7,033

|6,464.5

Bellavista

|194.51

|105

|90,305.3

|6,416.1

|–

Santa Clotilde

|256.24

|113

|85,770

|6,124.4

|5,700

Campo Serio

|421.35

|140

|50,342.9

|3,430.3

|–

Cabo Pantoja

|546.8

|166

|44,698.2

|3,007.5

|3,280

Nuevo Rocafuerte

|574.1

|173

|27,489.4

|1,937.3

|2,032

Pañacocha

|673

|203

|21,731.4

|1,552.1

|–

colspan="6" |Upper Napo
Puerto Francisco de Orellana

|782

|243

|12,343

|1,016

|1,105

Puerto Napo

|950

|427

|4,182.4

|260.9

|377.6

Discharge

Napo River at Bellavista average (Q), dominante (Qd) discharge (m3/s) and sediment load (S – million ton/year). Period from 1991/09–2009/08:

class="wikitable" style="text-align:center;"

!Water year

!Q

!S

!Qd

!Water year

!Q

!S

!Qd

1991/1992

|5,667

| 28.608

| 6,009

|2001/2002

|5,979

| 32.431

| 6,335

1992/1993

|7,104

| 47.718

| 7,447

|2002/2003

|5,669

| 32.154

| 6,312

1993/1994

|8,013

| 67.159

| 8,583

|2003/2004

|6,148

| 41.916

| 7,054

1994/1995

|6,055

| 34.801

| 6,525

|2004/2005

|6,456

| 37.953

| 6,767

1995/1996

|5,956

| 34.017

| 6,463

|2005/2006

|6,143

| 34.77

| 6,523

1996/1997

|6,262

| 38.258

| 6,790

|2006/2007

|6,535

| 40.344

| 6,942

1997/1998

|9,839

|105.956

|10,354

|2007/2008

|6,615

| 40.832

| 6,977

1998/1999

|6,839

| 51.48

| 7,686

|2008/2009

|7,428

| 52.504

| 7,749

1999/2000

|6,725

| 49.735

| 7,576

| colspan="4" |

2000/2001

|6,452

| 38.527

| 6,810

|Average

|6,660

| 44.953

| 7,161

{{cite book|url=https://portal.mtc.gob.pe/transportes/acuatico/documentos/estudios/03%20-%20Navegabilidad%20Rio%20Napo%20-%20Inf%20Fin%20-%20Vol%20III%20-%20Hidraulica%20Fluvial.pdf|title=ESTUDIO BINACIONAL DE NAVEGABILIDAD DEL RÍO NAPO|year=2010}}

Napo River at Bellavista average, minimum and maximum discharge (m3/s). Period from 2009/09 to 2023/08:

class="wikitable" style="text-align:center;"

!Water year

!Mean

!Min

!Max

!Water year

!Mean

!Min

!Max

2009/2010

|7,177

|

|

|2016/2017

|7,273.6

|3,200

|11,150

2010/2011

|5,768.2

|1,649

|10,860

|2017/2018

|7,284

|1,550

|13,500

2011/2012

|7,447.4

|2,894

|12,230

|2018/2019

|8,234

|2,850

|12,200

2012/2013

|7,452.7

|3,102

|11,230

|2019/2020

|8,100

|3,100

|12,700

2013/2014

|8,652

|3,230

|13,700

|2020/2021

|8,410

|3,620

|14,000

2014/2015

|9,336

|4,810

|13,450

|2021/2022

|6,855

|2,078

|13,500

2015/2016

|5,761

|498.6

|10,200

|2022/2023

|5,849

|1,201

|15,200

Minimum 498.6 m3/s (2016/02); Maximum: 15,820 m3/s (2015/07);{{cite web|url=https://www.gob.pe/institucion/senamhi/tema/reportes-hidrologicos|title=Reportes hidrológicos|access-date=2023-10-03|archive-date=2023-10-03|archive-url=https://web.archive.org/web/20231003234604/https://www.gob.pe/institucion/senamhi/tema/reportes-hidrologicos|url-status=live}}{{cite web|url=https://www.gob.pe/senamhi|title=Senamhi|date=7 September 2021|access-date=28 March 2023|archive-date=28 March 2023|archive-url=https://web.archive.org/web/20230328232315/https://www.gob.pe/senamhi|url-status=live}}

Napo River at Bellavista average, maximum, minimum and multiannual average (normal) discharge (m3/s) and anomaly (%):

class="wikitable" style="text-align:center;"

!

!Mean

!Max

!Min

!Normal

!(%)

colspan="6" |2010/09 – 2011/08
SEP

|2,620.5

|3,089

|1,969

|5,121.2

|–49

OCT

|2,413.5

|3,061

|1,649

|4,898.6

|–51

NOV

|3,818.7

|4,778

|2,696

|5,595.1

|–32

DEC

|4,774.1

|6,240

|4,148

|5,660.6

|–16

JAN

|3,604.2

|5,001

|2,174

|4,580.7

|–21

FEB

|2,480.7

|3,478

|1,920

|4,386.9

|–43

MAR

|4,753.4

|7,127

|3,790

|5,824.1

|–18

APR

|9,206.8

|10,240

|7,865

|7,502.4

|23

MAY

|9,561.5

|10,040

|8,348

|8,941.3

|7

JUN

|10,193.8

|10,860

|8,821

|9,422.9

|8

JUL

|9,846.3

|10,590

|7,904

|8,844.7

|11

AUG

|5,944.6

|8,658

|3,758

|6,610.8

|–10

Mean

|5,768.2

|6,930

|4,587

|6,449.1

|–12

colspan="6" |2011/09 – 2012/08
SEP

|4,551.3

|5,441

|3,757

|5,121.2

|11

OCT

|5,344.9

|6,995

|2,894

|4,898.6

|9

NOV

|4,427

|6,878

|3,023

|5,595.1

|–21

DEC

|6,536.8

|9,160

|5,205

|5,660.6

|15

JAN

|7,998.7

|9,501

|4,868

|4,580.7

|75

FEB

|6,536.8

|8,302

|5,155

|4,386.9

|49

MAR

|9,557.2

|12,150

|5,417

|5,824.1

|64

APR

|11,843.7

|12,230

|10,870

|7,502.4

|58

MAY

|10,322.7

|10,790

|9,702

|8,941.3

|15

JUN

|8,878.8

|9,961

|7,011

|9,422.9

|–6

JUL

|8,189.3

|9,228

|7,197

|8,844.7

|–7

AUG

|5,182

|7,605

|3,975

|6,612.4

|–22

Mean

|7,447.4

|9,020

|5,756

|6,449.2

|15.5

colspan="6" |2012/09 – 2013/08
SEP

|5,037

|7,822

|3,249

|5,096

|–1

OCT

|5,113

|6,457

|4,632

|4,918

|4

NOV

|4,130

|5,660

|3,102

|5,567

|–26

DEC

|4,755

|6,838

|3,568

|5,698

|–17

JAN

|7,589

|9,183

|3,854

|4,723

|61

FEB

|5,851

|9,071

|4,170

|4,465

|31

MAR

|10,060

|10,740

|9,127

|5,973

|68

APR

|9,405

|10610

|8,675

|7,683

|22

MAY

|8,322

|10,570

|6,932

|8,999

|–8

JUN

|10,495

|11,230

|9,743

|9,400

|12

JUL

|9,675

|10,410

|8,402

|8,817

|10

AUG

|9,001

|9,776

|8,386

|6,551

|37

Mean

|7,452.7

|9,030

|6,153

|6,490.8

|15

{{cite web|url=https://www.yumpu.com/es/document/read/14521231/evaluacion-hidrologica-de-las-cuencas-amazonicas-peruanas|title=EVALUACIÓN HIDROLÓGICA DE LAS CUENCAS AMAZÓNICAS PERUANAS – OCTUBRE 2011|access-date=2023-03-28|archive-date=2023-03-28|archive-url=https://web.archive.org/web/20230328232316/https://www.yumpu.com/es/document/read/14521231/evaluacion-hidrologica-de-las-cuencas-amazonicas-peruanas|url-status=live}}{{cite web|url=https://docplayer.es/93480959-Boletin-extraordinario-de-la-evaluacion-hidrologica-y-pluviometrica-en-la-cuenca-amazonica-peruana.html|title=EVALUACIÓN HIDROLÓGICA DE LAS CUENCAS AMAZÓNICAS PERUANAS – OCTUBRE 2012|access-date=2023-03-28|archive-date=2023-03-28|archive-url=https://web.archive.org/web/20230328232316/https://docplayer.es/93480959-Boletin-extraordinario-de-la-evaluacion-hidrologica-y-pluviometrica-en-la-cuenca-amazonica-peruana.html|url-status=live}}{{cite web|url=http://siar.regionloreto.gob.pe/documentos/boletin-extraordinario-evaluacion-hidrologica-pluviometrica-cuenca-0|title=BOLETIN EXTRAORDINARIO DE LA EVALUACIÓN HIDROLÓGICA Y PLUVIOMÉTRICA EN LA CUENCA AMAZÓNICA PERUANA – AGOSTO 2013|access-date=2021-11-02|archive-date=2021-11-02|archive-url=https://web.archive.org/web/20211102101657/http://siar.regionloreto.gob.pe/documentos/boletin-extraordinario-evaluacion-hidrologica-pluviometrica-cuenca-0|url-status=dead}}

class="wikitable" style="text-align:center;"

|+Napo River average discharge:

!Period

!Discharge

!Ref.

colspan="3" |Francisco de Orellana

(near mouth)

{{coord|3|27|28|S|72|43|3|W}}

2010–2015

|{{cvt|7,400|m3/s|cuft/s|abbr=on}}

|{{cite book|last1=William|first1=Santini|doi=10.5194/esurf-2018-93|url=https://d-nb.info/1176109367/34|title=An index concentration method for suspended load monitoring in large rivers of the Amazonian foreland|year=2019|doi-access=free }}

|{{cvt|7,500|m3/s|cuft/s|abbr=on}}

|{{cite book|last1=Charles J.|first1=Vörösmarty|last2=Berrien|first2=Moore|last3=Annette L.|first3=Grace|last4=M. Patricia|first4=Gildea|url=https://gmao.gsfc.nasa.gov/gmaoftp/sarith/ROUTING_MODEL/docs/Vorosmarty_1989.pdf|title=CONTINENTAL SCALE MODELS OF WATER BALANCE AND FLUVIAL TRANSPORT: AN APPLICATIONS TO SOUTH AMERICA|volume=3|page=241-265|year=1989}}

1971–2000

|{{cvt|7,147.8|m3/s|cuft/s|abbr=on}}

|{{cite web|url=https://www.riversnetwork.org/V1/index.php/component/content/?view=article&id=43&catid=191&Itemid=179|title=Amazon}}

|{{cvt|8,936|m3/s|cuft/s|abbr=on}}

|{{cite web|url=https://sinia.minam.gob.pe/taxonomy/term/142529|title=Oficina Nacional de Evaluación de Recursos Naturales (ONERN)}}

|{{cvt|4,555.23|m3/s|cuft/s|abbr=on}}

|{{cite web|title=Empresa de Electricidad del Perú S.A.-ELECTROPERU-Plataforma del Estado Peruano|date=19 May 2023 |url=https://www.gob.pe/electroperu}}

colspan="3" |Bellavista (Mazán)
1930–2006

|{{cvt|6,464|m3/s|cuft/s|abbr=on}}

|{{cite web|url=https://hybam.obs-mip.fr/|title=HYBAM}}

1981–2020

|{{cvt|6,800|m3/s|cuft/s|abbr=on}}

|{{cite journal|journal= Proceedings of the National Academy of Sciences|title=The Andes–Amazon–Atlantic pathway: A foundational hydroclimate system for social–ecological system sustainability|last1=Claire|first1=F. Beveridge|last2=Jhan-Carlo|first2=Espinoza|last3=Simone|first3=Athayde|last4=Sandra|first4=Bibiana Correa|last5=Thiago|first5=B. A. Couto|last6=Sebastian|first6=A. Heilpern|last7=Clinton|first7=N. Jenkins|last8=Natalia|first8=C. Piland|last9=Renata|first9=Utsunomiya|last10=Sly|first10=Wongchuig|last11=Elizabeth|first11=P. Anderson|doi=10.1073/pnas.2306229121|volume=121|date=2024|issue=22 |pages=e2306229121 |pmid=38722826 |pmc=11145265|bibcode=2024PNAS..12106229B }}

1989–2010

|{{cvt|6,360|m3/s|cuft/s|abbr=on}}

(Q–dominante: {{cvt|6,865|m3/s|cuft/s|abbr=on}}

|{{cite book|url=https://www.researchgate.net/publication/307881558|title=Hydrodynamic and sediment transport modeling in a bend of napo amazonian river: Morphodynamics and infrastructure implications|doi=10.13140/RG.2.2.27735.68008|last1=Julio Isaac|first1=Montenegro Gambini|year=2015}}

1991–2009

|{{cvt|6,660|m3/s|cuft/s|abbr=on}}

|{{cite book|url=https://portal.mtc.gob.pe/transportes/acuatico/documentos/estudios/03%20-%20Navegabilidad%20Rio%20Napo%20-%20Inf%20Fin%20-%20Vol%20III%20-%20Hidraulica%20Fluvial.pdf|title=ESTUDIO BINACIONAL DE NAVEGABILIDAD DEL RÍO NAPO|year=2010}}

1997–2015

|{{cvt|6,734.2|m3/s|cuft/s|abbr=on}}

|{{cite web |url=https://hess.copernicus.org/articles/23/3057/2019/hess-23-3057-2019-supplement.pdf |title=Assessing the performance of global hydrological models for capturing peak river flows in the Amazon basin |last=Jamie |first=Towner |year=2019 |access-date=28 March 2022 |archive-date=14 October 2023 |archive-url=https://web.archive.org/web/20231014093200/https://hess.copernicus.org/articles/23/3057/2019/hess-23-3057-2019-supplement.pdf |url-status=live }}

2000–2011

|{{cvt|6,461|m3/s|cuft/s|abbr=on}}

|{{cite web |url=http://www.minem.gob.pe/minem/archivos/6_1%2520-%25206_%2520Linea%2520Ambiental.pdf |title=6_1-6_Linea Ambiental |access-date=2021-10-15 |archive-date=2014-06-07 |archive-url=https://web.archive.org/web/20140607005732/http://www.minem.gob.pe/minem/archivos/6_1%20-%206_%20Linea%20Ambiental.pdf |url-status=dead }}

2001–2012

|{{cvt|6,758|m3/s|cuft/s|abbr=on}}

|{{cite journal|url=https://publications.iadb.org/en/publication/12341/preliminary-analysis-potential-river-hydrokinetic-energy-technologies-amazon|title=Preliminary Analysis of Potential for River Hydrokinetic Energy Tecnologies in the Amazon Basin|last1=Filizola|first1=Naziano|last2=Melo|first2=Edileuza|last3=Armijos|first3=Elisa|last4=McGlynn|first4=John|journal=Idb Publications |year=2015|doi=10.18235/0000222 |doi-broken-date=10 January 2025 |url-access=subscription}}

2001–2009

|{{cvt|6,369|m3/s|cuft/s|abbr=on}}

|{{cite book|url=https://portal.mtc.gob.pe/transportes/acuatico/documentos/estudios/03%20-%20Navegabilidad%20Rio%20Napo%20-%20Inf%20Fin%20-%20Vol%20III%20-%20Hidraulica%20Fluvial.pdf|title=ESTUDIO BINACIONAL DE NAVEGABILIDAD DEL RÍO NAPO|year=2010}}

2002–2008

|{{cvt|6,489|m3/s|cuft/s|abbr=on}}

|{{cite journal|url=https://www.academia.edu/13491896|title=Chemical weathering and atmospheric/soil CO2 uptake in the Andean and Foreland Amazon basins|last1=Alain|first1=Laraque|last2=Jean-Sébastien|first2=Moquet|journal=Chemical Geology |doi=10.1016/j.chemgeo.2011.01.005|year=2011|volume=287 |issue=1–2 |pages=1–26 |bibcode=2011ChGeo.287....1M }}

2003–2009

|{{cvt|6,855|m3/s|cuft/s|abbr=on}}

|{{cite book|url=https://repositorio.igp.gob.pe/handle/20.500.12816/956|title=Modelado hidrológico distribuido de la cuenca amazónica peruana utilizando precipitación obtenida por satélite|last1=Ricardo Zubieta|first1=Barragán|year=2013}}

2004–2010

|{{cvt|6,609|m3/s|cuft/s|abbr=on}}

|{{cite journal|url=https://www.academia.edu/18584394|title=Suspended sediment dynamics in the Amazon River of Peru|last1=Philippe|first1=Vauchel|last2=Jorge Luis|first2=Carranza Vasle|last3=Alain|first3=Crave|journal=Journal of South American Earth Sciences |year=2013|volume=44 |page=75 |doi=10.1016/j.jsames.2012.09.002 |bibcode=2013JSAES..44...75A }}

2001–2005

|{{cvt|6,976|m3/s|cuft/s|abbr=on}}

|{{cite web|url=https://www.academia.edu/2099322 |title=Sediment budget of the Napo River, Amazon basin, Ecuador and Peru |work=www.academia.edu Hydrological …, 2009|date=January 2009 |last1=Christophoul |first1=Frédéric }}

2004–2006

|{{cvt|6,267|m3/s|cuft/s|abbr=on}}

|{{cite web|url=https://www.academia.edu/2099322 |title=Sediment budget of the Napo River, Amazon basin, Ecuador and Peru |work=www.academia.edu Hydrological …, 2009|date=January 2009 |last1=Christophoul |first1=Frédéric }}

2016–2017

|{{cvt|9,338|m3/s|cuft/s|abbr=on}}

|{{cite journal|title=Hydrological modeling of the Peruvian-Ecuadorian Amazon Basin using GPM-IMERG satellite-based precipitation dataset|volume=21|issue=7|year=2017|last1=Ricardo|first1=Zubieta|last2=Augusto|first2=Getirana|last3=Jhan Carlo|first3=Espinoza|last4=Waldo|first4=Lavado-Casimiro|last5=Luis|first5=Aragon|journal=Hydrology and Earth System Sciences |pages=3543–3555 |doi=10.5194/hess-21-3543-2017 |doi-access=free |pmid=32753831 |pmc=7402198 |bibcode=2017HESS...21.3543Z }}

1971–2000

|{{cvt|7,032|m3/s|cuft/s|abbr=on}}

|{{cite web|url=https://www.riversnetwork.org/V1/index.php/component/content/?view=article&id=43&catid=191&Itemid=179|title=Amazon}}

Tributaries

List of the major tributaries of the Napo River (from the mouth upwards):

class="wikitable" style="text-align:center;"

! Left

tributary

! Right

tributary

! Length (km)

! Basin size (km2)

! *Average discharge (m3/s)

colspan="2" |Napo

|1,089.03

|103,307.79

|7,147.8

colspan="5" |
colspan="5" |Lower Napo
Sucusari

|

|

|590.7

|39.8

|Mazán

|509.11

|7,721.3

|532.9

Yanayaçu

| rowspan="3" |

|

|1,340

|89

Zapote

|

|140.8

|9.3

Papaya

|

|278

|17.5

rowspan="2" |

|Tacshacuraray

|203.1

|2,760.5

|196.5

Huirina

|

|610

|33.2

Tamboryaçu

|

|

|4,958

|327.2

rowspan="2" |

|Pucara

|

|827

|50.4

Curaray

|772.77

|26,704.7

|2,044.4

Tarapoto

|

|

|679

|46.1

|Gomez

|

|424.8

|32.6

Loro Caparin

|

|

|794.1

|61.8

|Anshiri

|

|2,682.5

|202.1

Santa Maria

| rowspan="2" |

|

|1,471.5

|107.8

Aguarico

|502.5

|13,404.5

|889.3

rowspan="4" |

|Yasuní

|238.5

|3,386.8

|237.7

Tiputini

|380.4

|4,423.1

|320.2

Huiririma

|

|

|13.2

Cariyuturi

|

|253.5

|18.3

Pañyaçu

|

|80

|876.7

|68.4

|Indillana

|71.8

|636.3

|51.5

Itaya

| rowspan="4" |

|

|120.6

|9.6

Jivino

|121.7

|707.9

|56

Blanco

|

|249

|17.6

Coca

|245.1

|5,308.1

|338.9

colspan="5" |Upper Napo
Payamino

| rowspan="3" |

|110.4

|2,012.6

|171.2

Suyunoyaçu

|

|198.8

|16.8

Suno

|96.7

|1,891.4

|161.2

|Arajuno

|

|835.9

|97.9

Pusuno

| rowspan="3" |

|

|160.2

|15.2

Misahuallí

|68.7

|1,659.6

|170.6

Jatunyaçu

|107

|3,221.2

|302.7

|Anzu

|69.7

|817.1

|75

*Period: 1971–2000{{cite web|url=https://www.riversnetwork.org/V1/index.php/component/content/?view=article&id=43&catid=191&Itemid=179|title=Amazon}}

See also

References

{{Reflist}}

{{Authority control}}

Category:Tributaries of the Amazon River

Category:Rivers of Ecuador

Category:Rivers of Peru

Category:International rivers of South America

Category:Rivers of the Department of Loreto

Category:Geography of Napo Province

Category:Geography of Orellana Province

Category:Geography of Sucumbíos Province

Category:Upper Amazon