Editing Napo River

{{Infobox river
| name               = Napo river
| name_native        = 
| name_native_lang   = 
| name_other         = 
| name_etymology     = 
<!---------------------- IMAGE & MAP -->
| image              = Napo River.jpg
| image_size         = 250
| image_caption      = The Napo River to the east of [[Puerto Francisco de Orellana|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= 
<!---------------------- LOCATION -->
| subdivision_type1  = Countries
| subdivision_name1  = {{hlist|[[Ecuador]]|[[Peru]]}}
| subdivision_type2  = 
| subdivision_name2  = 
| subdivision_type3  = 
| subdivision_name3  = 
| subdivision_type4  = 
| subdivision_name4  = 
| subdivision_type5  = 
| subdivision_name5  = 
<!---------------------- PHYSICAL CHARACTERISTICS -->
| length             = {{cvt|1,130|km|mi|abbr=on}}<ref name=fao>{{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|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}}</ref> 
| 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}}<ref name="CONTINENTAL SCALE MODELS OF WATER BALANCE AND FLUVIAL TRANSPORT: AN APPLICATIONS TO SOUTH AMERICA">{{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}}</ref> 
| discharge1_avg     =(Period: 1971–2000){{cvt|7,147.8|m3/s|cuft/s|abbr=on}}<ref name="Amazon">{{cite web|url=https://www.riversnetwork.org/V1/index.php/component/content/?view=article&id=43&catid=191&Itemid=179|title=Amazon}}</ref>
| discharge1_max     = {{cvt|10,800|m3/s|cuft/s|abbr=on}}<ref name="CONTINENTAL SCALE MODELS OF WATER BALANCE AND FLUVIAL TRANSPORT: AN APPLICATIONS TO SOUTH AMERICA">{{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}}</ref>
| 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 River|Amazon]] → [[Atlantic Ocean]]
| river_system       = '''[[Amazon River]]'''
| basin_size         = {{cvt|103,307.79|km2|mi2|abbr=on}}<ref name="Amazon">{{cite web|url=https://www.riversnetwork.org/V1/index.php/component/content/?view=article&id=43&catid=191&Itemid=179|title=Amazon}}</ref>
| tributaries_left   = Jatunyaçu, Misahualli, Payamino, [[Coca River|Coca]], [[Aguarico River|Aguarico]], Tamboyaçu
| tributaries_right  = Anzu, Llocullón, [[Tiputini River|Tiputini]], [[Yasuní River|Yasuní]], Anahiri, [[Curaray River|Curaray]], Tacshacuraray, Mazán
| custom_label       = 
| custom_data        = 
| extra              = 
|discharge2_location=[[Mazán District|Mazán]] ([[Mazán District|Bella Vista]])
|discharge2_avg=(Period: 1991–2023){{cvt|7,000|m3/s|cuft/s|abbr=on}}<ref name="Reportes hidrológicos">{{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}}</ref>
|discharge3_location=[[Napo District|Santa Clotilde]]
|discharge3_avg=(Period: 2002–2011){{cvt|5,895|m3/s|cuft/s|abbr=on}}<ref name=LineaAmbiental>{{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 }}</ref>
|discharge5_location=[[Puerto Francisco de Orellana]]
|discharge5_avg     =(Period: 2001–2009){{cvt|1,105|m3/s|cuft/s|abbr=on}}<ref name=LineaAmbiental>{{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 }}</ref>
|discharge4_location=[[Nueva Rocafuerte]]
|discharge4_avg=(Period: 2001–2009){{cvt|2,032|m3/s|cuft/s|abbr=on}}<ref name=LineaAmbiental>{{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 }}</ref>
|discharge2_min={{cvt|3,250|m3/s|cuft/s|abbr=on}}<ref name="Reportes hidrológicos">{{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}}</ref>
|discharge2_max={{cvt|11,200|m3/s|cuft/s|abbr=on}}<ref name="Reportes hidrológicos">{{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}}</ref>}}

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]] [[volcano]]es 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 km<sup>2</sup>. The mean annual discharge at [[Mazán District|Mazán]] {{cvt|6,800|m3/s|cuft/s|abbr=on}}.<ref name="The Andes–Amazon–Atlantic pathway: A foundational hydroclimate system for social–ecological system sustainability">{{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 }}</ref><ref name=SedimentBudget>{{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 }}</ref><ref name="ESTUDIO BINACIONAL DE NAVEGABILIDAD DEL RÍO NAPO">{{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}}</ref>

==Geography==
[[Image:NapoVillagePeru02-02.jpg|thumb|Village along the west bank of Napo River in Peru, a few miles above confluence with the Amazon. The land visible beyond the waterway is an island in the river.]]

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 River|Aguarico]] having its headwaters between Cayambe and the [[Colombia]] frontier.
From the west, it receives a secondary tributary, the [[Curaray River|Curaray]], from the [[Andes|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 [[swamp]]s and [[lagoon]]s. 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 mile|River kilometer]] (rkm)
! rowspan="2" |[[Elevation]] (m)
! rowspan="2" |[[Drainage basin]]

(km<sup>2</sup>)
! colspan="2" |Average [[Discharge regime|discharge]]
(m<sup>3</sup>/s)
|-
! <ref name="Hydro-SHEDS">{{cite web|url=https://www.hydrosheds.org|title=Hydro-SHEDS}}</ref><ref name="Amazon">{{cite web|url=https://www.riversnetwork.org/V1/index.php/component/content/?view=article&id=43&catid=191&Itemid=179|title=Amazon}}</ref>
 ! <ref name="SO-HYBAM">{{cite web|url=https://hybam.obs-mip.fr|title=SO-HYBAM}}</ref>
|-
| colspan="6" |'''Lower Napo'''
|-
|Francisco de Orellana
|0
|78
|103,307.79
|7,147.8
|6,611
|-
|[[Mazán District|Mazán]]
|79.76
|85
|100,518
|7,033
|6,464.5
|-
|Bellavista
|194.51
|105
|90,305.3
|6,416.1
|–
|-
|[[Napo District|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 [[Mazán District|Bellavista]] average (Q), dominante (Q<sub>d</sub>) discharge (m<sup>3</sup>/s) and [[Stream load|sediment load]] (S – million ton/year). Period from 1991/09–2009/08:
{| class="wikitable" style="text-align:center;"
!Water year 
!Q
!S
!Q<sub>d</sub>
!Water year 
!Q
!S
!Q<sub>d</sub>
|-
|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'''
|}
<ref name="ESTUDIO BINACIONAL DE NAVEGABILIDAD DEL RÍO NAPO">{{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}}</ref>

Napo River at [[Mazán District|Bellavista]] average, minimum and maximum discharge (m<sup>3</sup>/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 m<sup>3</sup>/s (2016/02); Maximum: 15,820 m<sup>3</sup>/s (2015/07);<ref name="Reportes hidrológicos">{{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}}</ref><ref name="Senamhi">{{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}}</ref>

Napo River at [[Mazán District|Bellavista]] average, maximum, minimum and multiannual average (normal) discharge (m<sup>3</sup>/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''
|}
<ref name="EVALUACIÓN HIDROLÓGICA DE LAS CUENCAS AMAZÓNICAS PERUANAS – OCTUBRE 2011">{{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}}</ref><ref name="EVALUACIÓN HIDROLÓGICA DE LAS CUENCAS AMAZÓNICAS PERUANAS – OCTUBRE 2012">{{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}}</ref><ref name="BOLETIN EXTRAORDINARIO DE LA EVALUACIÓN HIDROLÓGICA Y PLUVIOMÉTRICA EN LA CUENCA AMAZÓNICA PERUANA – AGOSTO 2013">{{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}}</ref>
{| 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}}
|<ref name="An index concentration method for suspended load monitoring in large rivers of the Amazonian foreland">{{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 }}</ref>
|-
|
|{{cvt|7,500|m3/s|cuft/s|abbr=on}}
|<ref name="CONTINENTAL SCALE MODELS OF WATER BALANCE AND FLUVIAL TRANSPORT: AN APPLICATIONS TO SOUTH AMERICA">{{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}}</ref>
|-
|1971–2000
|{{cvt|7,147.8|m3/s|cuft/s|abbr=on}}
|<ref name="Amazon">{{cite web|url=https://www.riversnetwork.org/V1/index.php/component/content/?view=article&id=43&catid=191&Itemid=179|title=Amazon}}</ref>
|-
|
|{{cvt|8,936|m3/s|cuft/s|abbr=on}}
|<ref name="Oficina Nacional de Evaluación de Recursos Naturales (ONERN)">{{cite web|url=https://sinia.minam.gob.pe/taxonomy/term/142529|title=Oficina Nacional de Evaluación de Recursos Naturales (ONERN)}}</ref>
|-
|
|{{cvt|4,555.23|m3/s|cuft/s|abbr=on}}
|<ref name="Empresa de Electricidad del Perú S.A.-ELECTROPERU-Plataforma del Estado Peruano">{{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}}</ref>
|-
| colspan="3" |''[[Mazán District|Bellavista]] (Mazán)''
|-
|1930–2006
|{{cvt|6,464|m3/s|cuft/s|abbr=on}}
|<ref name="HYBAM">{{cite web|url=https://hybam.obs-mip.fr/|title=HYBAM}}</ref>
|-
|1981–2020
|{{cvt|6,800|m3/s|cuft/s|abbr=on}}
|<ref name="The Andes–Amazon–Atlantic pathway: A foundational hydroclimate system for social–ecological system sustainability">{{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 }}</ref>
|-
|1989–2010
|{{cvt|6,360|m3/s|cuft/s|abbr=on}}
(Q–dominante: {{cvt|6,865|m3/s|cuft/s|abbr=on}}
|<ref name="Hydrodynamic and sediment transport modeling in a bend of napo amazonian river: Morphodynamics and infrastructure implications">{{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}}</ref>
|-
|1991–2009
|{{cvt|6,660|m3/s|cuft/s|abbr=on}}
|<ref name="ESTUDIO BINACIONAL DE NAVEGABILIDAD DEL RÍO NAPO">{{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}}</ref>
|-
|1997–2015
|{{cvt|6,734.2|m3/s|cuft/s|abbr=on}}
|<ref name="Assessing the performance of global hydrological models for capturing peak river flows in the Amazon basin">{{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 }}</ref>
|-
|2000–2011
|{{cvt|6,461|m3/s|cuft/s|abbr=on}}
|<ref name=LineaAmbiental>{{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 }}</ref>
|-
|2001–2012
|{{cvt|6,758|m3/s|cuft/s|abbr=on}}
|<ref name="Preliminary Analysis of Potential for River Hydrokinetic Energy Technologies in the Amazon Basin">{{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 }}</ref>
|-
|2001–2009
|{{cvt|6,369|m3/s|cuft/s|abbr=on}}
|<ref name="ESTUDIO BINACIONAL DE NAVEGABILIDAD DEL RÍO NAPO">{{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}}</ref>
|-
|2002–2008
|{{cvt|6,489|m3/s|cuft/s|abbr=on}}
|<ref name="Chemical weathering and atmospheric/soil CO2 uptake in the Andean and Foreland Amazon basins">{{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 }}</ref>
|-
|2003–2009
|{{cvt|6,855|m3/s|cuft/s|abbr=on}}
|<ref name="Modelado hidrológico distribuido de la cuenca amazónica peruana utilizando precipitación obtenida por satélite">{{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}}</ref>
|-
|2004–2010
|{{cvt|6,609|m3/s|cuft/s|abbr=on}}
|<ref name="Suspended sediment dynamics in the Amazon River of Peru">{{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 }}</ref>
|-
|2001–2005
|{{cvt|6,976|m3/s|cuft/s|abbr=on}}
|<ref name=SedimentBudget>{{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 }}</ref>
|-
|2004–2006
|{{cvt|6,267|m3/s|cuft/s|abbr=on}}
|<ref name=SedimentBudget>{{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 }}</ref>
|-
|2016–2017
|{{cvt|9,338|m3/s|cuft/s|abbr=on}}
|<ref name="Hydrological modeling of the Peruvian-Ecuadorian Amazon Basin using GPM-IMERG satellite-based precipitation dataset">{{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 }}</ref>
|-
|1971–2000
|{{cvt|7,032|m3/s|cuft/s|abbr=on}}
|<ref name="Amazon">{{cite web|url=https://www.riversnetwork.org/V1/index.php/component/content/?view=article&id=43&catid=191&Itemid=179|title=Amazon}}</ref>
|}

==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 (km<sup>2</sup>)
 ! <sup>*</sup>Average discharge (m<sup>3</sup>/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 River|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 River|Aguarico]]
|502.5
|13,404.5
|889.3
|-
| rowspan="4" |
|[[Yasuní River|Yasuní]]
|238.5
|3,386.8
|237.7
|-
|[[Tiputini River|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 River|Coca]]
|245.1
|5,308.1
|338.9
|-
| colspan="5" |'''Upper Napo'''
|-
|[[Payamino River|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
|}
<sup>*</sup>Period: 1971–2000<ref name="Amazon">{{cite web|url=https://www.riversnetwork.org/V1/index.php/component/content/?view=article&id=43&catid=191&Itemid=179|title=Amazon}}</ref>

== See also ==
* [[Lake Pilchicocha]]

==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]]