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The Nile, , Bohairic , lg, Kiira ,
Nobiin Nobiin, or Mahas, is a Northern Nubian languages, Nubian language of the Nilo-Saharan languages, Nilo-Saharan language family. "Nobiin" is the genitive case, genitive form of ''Nòòbíí'' ("Nubian") and literally means "(language) of the Nubian ...
: Áman Dawū is a major north-flowing
river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of water ...

river
in northeastern
Africa Africa is the world's second-largest and second-most populous continent A continent is one of several large landmasses. Generally identified by convention (norm), convention rather than any strict criteria, up to seven regions are ...

Africa
. It flows into the
Mediterranean Sea The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the ...
. The longest river in Africa, it has historically been considered the longest river in the world, though this has been contested by research suggesting that the
Amazon River The Amazon River (, ; es, Río Amazonas, pt, Rio Amazonas) in South America is the List of rivers by discharge, largest river by Discharge (hydrology), discharge volume of water in the world, and the disputed List of rivers by length, longest ...

Amazon River
is slightly longer.Amazon Longer Than Nile River, Scientists Say
The Nile is amongst the smallest of the major world rivers by measure of cubic metres flowing annually. About long, its
drainage basin A drainage basin is any area of land where precipitation collects and drains off into a common outlet, such as into a river, bay, or other body of water. The drainage basin includes all the surface water from surface runoff, rain runoff, snowm ...

drainage basin
covers eleven countries:
Tanzania Tanzania (;This approximates the Kiswahili pronunciation. However, is also heard in English. ), officially the United Republic of Tanzania ( sw, Jamhuri ya Muungano wa Tanzania), is a country in East Africa within the African Great Lakes regi ...

Tanzania
,
Uganda Uganda (Languages of Uganda, Ugandan Languages: Yuganda), officially the Republic of Uganda ( sw, Jamhuri ya Uganda), is a landlocked country in East Africa. It is bordered to the east by Kenya, to the north by South Sudan, to the west by the ...

Uganda
,
Rwanda Rwanda, officially the Republic of Rwanda, is a landlocked country A landlocked country is a country A country is a distinct territory, territorial body or political entity. It is often referred to as the land of an individual's bi ...

Rwanda
,
Burundi Burundi (, ), officially the Republic of Burundi ( rn, Repubulika y’u Burundi, ; Swahili: Jamuhuri ya Burundi; french: link=no, République du Burundi, or ), is a landlocked country in the Great Rift Valley where the African Great Lakes reg ...

Burundi
, the
Democratic Republic of the Congo The Democratic Republic of the Congo ( french: République démocratique du Congo (RDC) ), also known as Congo-Kinshasa, DR Congo, the DRC, the DROC, or the Congo, and formerly Zaire Zaire (), officially the Republic of Zaire (french: ...

Democratic Republic of the Congo
,
Kenya ) , national_anthem = "Ee Mungu Nguvu Yetu "Ee Mungu Nguvu Yetu" (, ) is the national anthem of Kenya. History "Ee Mungu Nguvu Yetu"'s lyrics were originally written in Swahili language, Kiswahili, the national language of Kenya ...

Kenya
,
Ethiopia Ethiopia, officially the Federal Democratic Republic of Ethiopia, is a in the . It shares borders with and to the north, to the northeast, to the east, to the south, to the west and to the . Ethiopia has a total area of and over ...

Ethiopia
,
Eritrea Eritrea ( ), officially the State of Eritrea, is a country in the Horn of Africa region of East Africa, Eastern Africa, with its capital (and largest city) at Asmara. It is bordered by Ethiopia in the south, Sudan in the west, and Djibouti ...

Eritrea
,
South Sudan South Sudan (), officially known as the Republic of South Sudan, is a landlocked country in East Africa, east/central Africa. It is bordered to the east by Ethiopia, to the north by Sudan, to the west by the Central African Republic, to the ...

South Sudan
,
Republic of the Sudan Sudan (; ar, السودان, as-Sūdān), officially the Republic of the Sudan ( ar, جمهورية السودان, link=no, Jumhūriyyat as-Sūdān), is a country in Northeast Africa Northeast Africa, or ''Northeastern Africa'' or Northern ...
, and
Egypt Egypt ( ar, مِصر, Miṣr), officially the Arab Republic of Egypt, is a spanning the and the of . It is bordered by the to , the () and to , the to the east, to , and to . In the northeast, the , which is the northern arm of the R ...

Egypt
. In particular, the Nile is the primary water source of Egypt, Sudan and South Sudan. Additionally, the Nile is an important economic river, supporting agriculture and fishing. The Nile has two major
tributaries A tributary or affluent is a stream or river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases a river flows into the ground and becomes dry at the end of its ...
– the
White Nile The White Nile ( ar, النيل الأبيض ') is a river in Africa, one of the two main tributaries A tributary or affluent is a stream or river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, ...

White Nile
, which begins at Jinja,
Lake Victoria Lake Victoria ( luo, Nam Lolwe; lg, 'Nnalubaale; rw, Nyanza; also ''Ukerewe'') is one of the African Great Lakes The African Great Lakes ( sw, Maziwa Makuu) are a series of lakes constituting the part of the Rift Valley lakes in and around ...

Lake Victoria
, and the
Blue Nile The Blue Nile (; ), is a river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course w ...

Blue Nile
. The White Nile is traditionally considered to be the
headwaters The headwaters of a or is the farthest place in that river or stream from its or downstream with another river, as measured along the course of the river. It is also known as a river's source. Definition The (USGS) states that a river ...
stream. However, the Blue Nile is the source of most of the
water Water (chemical formula H2O) is an , transparent, tasteless, odorless, and , which is the main constituent of 's and the s of all known living organisms (in which it acts as a ). It is vital for all known forms of , even though it provide ...

water
of Nile downstream, containing 80% of the water and
silt Silt is granular material of a size between sand and clay and composed mostly of broken grains of quartz. Silt may occur as a soil (often mixed with sand or clay) or as sediment mixed in suspension (chemistry), suspension with water. Silt usually ...
. The White Nile is longer and rises in the
Great Lakes upright=1.3, Location in North America The Great Lakes also called the Great Lakes of North America or the Laurentian Great Lakes, is a series of large interconnected freshwater lake A lake is an area filled with water, localized in a ...

Great Lakes
region. It begins from Uganda
Lake Victoria Lake Victoria ( luo, Nam Lolwe; lg, 'Nnalubaale; rw, Nyanza; also ''Ukerewe'') is one of the African Great Lakes The African Great Lakes ( sw, Maziwa Makuu) are a series of lakes constituting the part of the Rift Valley lakes in and around ...

Lake Victoria
, Uganda and South Sudan. The Blue Nile begins at
Lake Tana Lake Tana ( am, ጣና ሐይቅ) (previously Tsana) is the largest lake A lake is an area filled with water, localized in a Depression (geology), basin, surrounded by land, and set apart from any river or other outlet that serves to feed o ...
in Ethiopia and flows into Sudan from the southeast. The two rivers meet at the Sudanese capital of
Khartoum Khartoum or Khartum ( ; ar, الخرطوم, Al-Khurṭūm) is the capital of Sudan Sudan (; ar, السودان, as-Sūdān), officially the Republic of the Sudan ( ar, جمهورية السودان, link=no, Jumhūriyyat as-Sūdān), is a ...

Khartoum
. The northern section of the river flows north almost entirely through the Sudanese
desert upright=1.5, alt=see caption, Sand dunes in the Rub' al Khali ("Empty quarter") in the United Arab Emirates">Rub'_al_Khali.html" ;"title="Sand dunes in the Rub' al Khali">Sand dunes in the Rub' al Khali ("Empty quarter") in the United Arab ...

desert
to Egypt, where
Cairo Cairo ( ; ar, القاهرة, al-Qāhirah, , : ⲕⲁϩⲓⲣⲏ) is the and of . The , with a population of 21.3 million, is the 2nd and in the , and the in the world. Cairo is associated with , as the famous and the ancient city of are ...

Cairo
is located on its large delta and the river flows into the
Mediterranean Sea The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the ...
at
Alexandria Alexandria ( or ; ar, الإسكندرية ; arz, اسكندرية ; : Rakodī; el, Αλεξάνδρεια ''Alexandria'') is the in after and , in , and a major economic centre. With a total population of 5,200,000, Alexandria is the ...

Alexandria
. Egyptian civilization and Sudanese kingdoms have depended on the river since ancient times and its annual flooding. Most of the population and cities of Egypt lie along those parts of the Nile
valley A valley is an elongated low area often running between hills or mountains, which will typically contain a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over a ...

valley
north of
Aswan dam The Aswan Dam, or more specifically since the 1960s, the Aswan High Dam, is the world's largest , which was built across the in , , between 1960 and 1970. Its significance largely eclipsed the previous initially completed in 1902 downstream. Bas ...

Aswan dam
. Nearly all the cultural and historical sites of
Ancient Egypt Ancient Egypt was a of , concentrated along the lower reaches of the , situated in the place that is now the country . Ancient Egyptian civilization followed and coalesced around 3100 (according to ) with the political unification of u ...

Ancient Egypt
developed and are found along river banks.


Etymology and names

The standard English names "White Nile" and "Blue Nile" refer to the river's source, derived from
Arabic Arabic (, ' or , ' or ) is a Semitic language The Semitic languages are a branch of the Afroasiatic language family originating in the Middle East The Middle East is a list of transcontinental countries, transcontinental region ...

Arabic
names formerly applied to only the Sudanese stretches that meet at Khartoum. In the ancient
Egyptian language The Egyptian language or Ancient Egyptian ( egy, 𓂋𓏺𓈖 𓆎𓅓𓏏𓊖, , cop, ϯⲙⲉⲧⲣⲉⲙⲛ̀ⲭⲏⲙⲓ) is an which was spoken in . Its attestation stretches over an extraordinarily long time, from the stage (mid-4th m ...
, the Nile is called ''Ḥ'pī'' (Hapy) or ''Iteru'', meaning "river". In
Coptic Coptic may refer to: Afro-Asia * Copts, an ethnoreligious group mainly in the area of modern Egypt but also in Sudan and Libya * Coptic language, a Northern Afro-Asiatic language spoken in Egypt until at least the 17th century * Coptic alphabet, th ...
, the word ⲫⲓⲁⲣⲟ, pronounced ''piaro'' ( Sahidic) or ''phiaro'' ( Bohairic), means "the river" (lit. p(h).iar-o "the.canal-great"), and comes from the same ancient name. In
Nobiin Nobiin, or Mahas, is a Northern Nubian languages, Nubian language of the Nilo-Saharan languages, Nilo-Saharan language family. "Nobiin" is the genitive case, genitive form of ''Nòòbíí'' ("Nubian") and literally means "(language) of the Nubian ...
the river is called Áman Dawū, meaning "the great water". In
Luganda The Ganda language or Luganda (, , ) is a Bantu language spoken in the African Great Lakes region. It is one of the major languages in Uganda and is spoken by more than 10 million Ganda people, Baganda and other people principally in central Uga ...
the river is called Kiira or Kiyira. In
Egyptian Arabic Egyptian Arabic, locally known as Colloquial Egyptian ( ar, العامية المصرية, ), or simply ''Masri'' (), is the spoken vernacular A vernacular or vernacular language refers to the language or dialect that is spoken by people tha ...
, the Nile is called ''en-Nīl'', while in
Standard Arabic Modern Standard Arabic (MSA) or Modern Written Arabic (shortened to MWA), terms used mostly by Western linguists, is the variety of Standard language, standardized, Literary language, literary Arabic that developed in the Arab world in the late ...
it is called ''an-Nīl''. In
Biblical Hebrew Biblical Hebrew ( ''Ivrit Miqra'it'' or ''Leshon ha-Miqra''), also called Classical Hebrew, is an archaic form of Hebrew language, Hebrew, a language in the Canaanite languages, Canaanite branch of Semitic languages, Semitic languages, spoken b ...
, it is , ''Ha-Ye'or'' or , ''Ha-Shiḥor''. The English name ''Nile'' and the Arabic names ''en-Nîl'' and ''an-Nîl'' both derive from the
Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally spoken in the area around Rome, known as Latium. Through the power of the Roman Republic, it became the dominant la ...

Latin
' and the
Ancient Greek Ancient Greek includes the forms of the used in and the from around 1500 BC to 300 BC. It is often roughly divided into the following periods: (), Dark Ages (), the period (), and the period (). Ancient Greek was the language of an ...
. Beyond that, however, the etymology is disputed.
Homer Homer (; grc, Ὅμηρος , ''Hómēros'') was the presumed author of the ''Iliad'' and the ''Odyssey'', two epic poems that are the foundational works of ancient Greek literature. The ''Iliad'' is set during the Trojan War, the ten-year s ...

Homer
called the river , ''Aiguptos'', but in subsequent periods, Greek authors referred to its lower course as ''Neilos''; this term became generalised for the entire river system. Thus, the name may derive from Ancient Egyptian expression ''n''ꜣ ''r''ꜣ''w-ḥ''ꜣ''w(t)'' (lit. 'the mouths of the front parts'), which referred specifically to the branches of the Nile transversing the Delta, and would have been pronounced ''ni-lo-he'' in the area around
Memphis Memphis is the name of: *Memphis, Egypt , alternate_name = , image = , alt = , caption = Ruins of the pillared hall of Ramesses IIat Mit Rahina , map_type = Egypt , map_alt = , map_size = , reli ...
in the 8th century BCE.
Hesiod Hesiod (; grc-gre, Ἡσίοδος ''Hēsíodos'', 'he who emits the voice') was an ancient Greek poet generally thought to have been active between 750 and 650 BC, around the same time as Homer. He is generally regarded as the first written ...
at his ''
Theogony The ''Theogony'' (, , , i.e. "the genealogy or birth of the ") is a by (8th – 7th century BC) describing the origins and of the , composed c. 730–700 BC. It is written in the of and contains 1022 lines. Descriptions Hesiod's ''Theog ...
'' refers to Nilus (Νεῖλος) as one of the
Potamoi The Potamoi ( grc-gre, Ποταμοί, "Rivers") are the gods of river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases a river flows into the ground and becomes ...
(river gods), son of
Oceanus In Greek mythology, Oceanus (; grc-gre, , also Ὠγενός, Ὤγενος, or Ὠγήν) was a Titans (mythology), Titan son of Uranus (mythology), Uranus and Gaia, the husband of his sister the Titan Tethys (mythology), Tethys, and the fath ...

Oceanus
and Tethys. Another derivation of ''Nile'' might be related to the term ''Nil'' ( sa, नील, nila; arz, نيلة), which refers to ''
Indigofera tinctoria ''Indigofera tinctoria'', also called true indigo, is a species of plant from the bean family that was one of the original sources of indigo dye. It has been naturalized to tropical and temperate Asia, as well as parts of Africa, but its native h ...

Indigofera tinctoria
'', one of the original sources of
indigo dye Indigo dye is an organic compound In , organic compounds are generally any s that contain - . Due to carbon's ability to (form chains with other carbon s), millions of organic compounds are known. The study of the properties, reactions, and ...
. Another may be ''
Nymphaea caerulea ''Nymphaea nouchali'' var. ''caerulea'', also known as ''Nymphaea caerulea'', and known in English as Egyptian lotus, blue lotus, blue water lily ( RSA), Cape water lily (RSA), frog's pulpit (RSA), blue lotus of the Nile, blue waterlily, blue Egy ...

Nymphaea caerulea
'', known as "The Sacred Blue Lily of the Nile", which was found scattered over
Tutankhamen Tutankhamun (, egy, twt-ꜥnḫ-jmn), Egyptological pronunciation Tutankhamen () ( 1342c. 1325 BC), commonly referred to as King Tut, was an ancient Egypt Ancient Egypt was a civilization of Ancient history, ancient ...
's corpse when it was excavated in 1922. Another possible etymology derives from the
Semitic Semitic most commonly refers to the Semitic languages, a name used since the 1770s to refer to the language family currently present in West Asia, North and East Africa, and Malta. Semitic may also refer to: Religions * Abrahamic religions ** ...

Semitic
term ''Nahal'', meaning "river". Old Libyan has the term ''lilu'', meaning water (in modern Berber ''ilel'' ⵉⵍⴻⵍ means ''sea'').


Courses

With a total length of about between the region of
Lake Victoria Lake Victoria ( luo, Nam Lolwe; lg, 'Nnalubaale; rw, Nyanza; also ''Ukerewe'') is one of the African Great Lakes The African Great Lakes ( sw, Maziwa Makuu) are a series of lakes constituting the part of the Rift Valley lakes in and around ...

Lake Victoria
and the
Mediterranean Sea The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the ...
, the Nile is among the longest rivers on Earth. The
drainage basin A drainage basin is any area of land where precipitation collects and drains off into a common outlet, such as into a river, bay, or other body of water. The drainage basin includes all the surface water from surface runoff, rain runoff, snowm ...

drainage basin
of the Nile covers , about 10% of the area of Africa. Compared to other major rivers, though, the Nile carries little water (5% of the
Congo River The Congo River ( kg, Nzâdi Kôngo, french: Fleuve Congo, pt, Rio Congo), formerly also known as the Zaire River, is the second longest river in Africa Africa is the world's second-largest and second-most populous continent A ...
, for example). The Nile basin is complex, and because of this, the discharge at any given point along the mainstem depends on many factors including weather, diversions, evaporation and
evapotranspiration Evapotranspiration (ET) is the sum of water evaporation and transpiration from a surface area to the Atmosphere of Earth, atmosphere. Evaporation accounts for the movement of water to the air from sources such as the soil, canopy interception, and ...

evapotranspiration
, and
groundwater Groundwater is the water Water (chemical formula H2O) is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living ...

groundwater
flow. Upstream from
Khartoum Khartoum or Khartum ( ; ar, الخرطوم, Al-Khurṭūm) is the capital of Sudan Sudan (; ar, السودان, as-Sūdān), officially the Republic of the Sudan ( ar, جمهورية السودان, link=no, Jumhūriyyat as-Sūdān), is a ...

Khartoum
(to the south), the river is known as the
White Nile The White Nile ( ar, النيل الأبيض ') is a river in Africa, one of the two main tributaries A tributary or affluent is a stream or river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, ...

White Nile
, a term also used in a limited sense to describe the section between
Lake No Lake No is a lake in South Sudan. It is located just north of the vast swamp of the Sudd, at the confluence of the Bahr al Jabal (river), Bahr al Jabal and Bahr el Ghazal River, Bahr el Ghazal rivers, and marks the transition between the Bahr al J ...
and Khartoum. At Khartoum, the river is joined by the
Blue Nile The Blue Nile (; ), is a river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course w ...

Blue Nile
. The White Nile starts in equatorial East Africa, and the Blue Nile begins in Ethiopia. Both branches are on the western flanks of the
East African Rift File:East Africa Rift System GPS and stresses.png, Main rift faults, plates, plate boundaries, GPS plate velocities between adjacent blocks and minimum horizontal stress directions The East African Rift (EAR) or East African Rift System (EARS) is ...
.


Sources

The Nile River system has two principal tributaries which combined make the existing Nile river, the White Nile, which supplies much less water to Nile's flow, and the Blue Nile. The source of the White Nile is the Luvironza River, the source of the Blue Nile is
Lake Tana Lake Tana ( am, ጣና ሐይቅ) (previously Tsana) is the largest lake A lake is an area filled with water, localized in a Depression (geology), basin, surrounded by land, and set apart from any river or other outlet that serves to feed o ...
in the Gilgel Abbay watershed in the
Ethiopian Highlands The Ethiopian Highlands is a rugged mass of mountain A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. A mountain differs from a plateau in having a limited summit are ...
. In 2010, an exploration party went to a place described as the source of the Rukarara tributary, and by hacking a path up steep jungle-choked mountain slopes in the Nyungwe forest found (in the
dry season The dry season is a yearly period of low rainfall, especially in the tropics The tropics are the region of Earth Earth is the third planet from the Sun and the only astronomical object known to harbor life. About 29% of Earth's su ...
) an appreciable incoming surface flow for many kilometres upstream, and found a new source, giving the Nile a length of . The most remotely located source from the Mediterranean outflow is found at the Luvironza River in Tanzania which is from the sea.
Gish Abay Gish Abay is a town in west-central Ethiopia Ethiopia (; am, ኢትዮጵያ, , aa, Itiyoophiyaa, gez, ኢትዮጵያ, om , Itoophiyaa, so, Itoobiya, ti , ኢትዮጵያ), officially the Federal Democratic Republic of Ethiopia, is a ...
is reportedly the place where the "holy water" of the first drops of the Blue Nile develop.


In Uganda

The Nile leaves
Lake Victoria Lake Victoria ( luo, Nam Lolwe; lg, 'Nnalubaale; rw, Nyanza; also ''Ukerewe'') is one of the African Great Lakes The African Great Lakes ( sw, Maziwa Makuu) are a series of lakes constituting the part of the Rift Valley lakes in and around ...

Lake Victoria
at
Ripon FallsRipon Falls at the northern end of Lake Victoria in Uganda was formerly considered the source of the river Nile. In 1862–3 John Hanning Speke was the first European to follow the course of the Nile downstream after discovering the falls that his in ...

Ripon Falls
near
Jinja, Uganda Jinja is a city in the Eastern Region of Uganda Uganda (Languages of Uganda, Ugandan Languages: Yuganda ), officially the Republic of Uganda ( sw, Jamhuri ya Uganda), is a landlocked country in East Africa, East-Central Africa. It is borde ...
, as the
Victoria Nile The White Nile ( ar, النيل الأبيض ') is a river in Africa, one of the two main tributary, tributaries of the Nile, the other being the Blue Nile. The name comes from colouring due to clay carried in the water. In the strict meaning, ...
. It flows north for some , to
Lake Kyoga Lake Kyoga (also spelled Kioga) is a large shallow lake A lake is an area filled with water, localized in a basin, surrounded by land, apart from any river A river is a natural flowing watercourse, usually freshwater, flowing towards ...
. The last part of the approximately river section starts from the western shores of the lake and flows at first to the west until just south of Masindi Port, where the river turns north, then makes a great half circle to the east and north until
Karuma Falls Karuma Falls is a town in Uganda Uganda (Languages of Uganda, Ugandan Languages: Yuganda ), officially the Republic of Uganda ( sw, Jamhuri ya Uganda), is a landlocked country in East Africa, East-Central Africa. It is bordered to the eas ...
. For the remaining part, it flows merely westerly through the until it reaches the very northern shores of
Lake Albert A lake is an area filled with water, localized in a Depression (geology), basin, surrounded by land, apart from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the World Ocean, ocean, alt ...
where it forms a significant
river delta A river delta is a landform A landform is a natural or artificial feature of the solid surface of the Earth or other planetary body A planet is an astronomical body Astronomy (from el, ἀστρονομία, literally meaning the ...

river delta
. The lake itself is on the border of
DR Congo The Democratic Republic of the Congo ( french: République démocratique du Congo (RDC) ), also known as Congo-Kinshasa, DR Congo, the DRC, the DROC, or the Congo, and formerly Zaire Zaire (, ), officially the Republic of Zaire (french ...
, but the Nile is not a border river at this point. After leaving Lake Albert, the river continues north through Uganda and is known as the
Albert Nile The White Nile ( ar, النيل الأبيض ') is a river in Africa, one of the two main tributaries of the Nile The Nile ( ar, النيل, an-Nīl, , Bohairic , lg, Kiira , Nobiin: Áman Dawū) is a major north-flowing river A r ...
.


In South Sudan

The Nile river flows into
South Sudan South Sudan (), officially known as the Republic of South Sudan, is a landlocked country in East Africa, east/central Africa. It is bordered to the east by Ethiopia, to the north by Sudan, to the west by the Central African Republic, to the ...

South Sudan
just south of
Nimule Nimule is a city in the southern part of South Sudan South Sudan (), officially known as the Republic of South Sudan, is a landlocked country in East Africa, east/central Africa. It is bordered to the east by Ethiopia, to the north by Sud ...
, where it is known as the ("Mountain River"). Just south of the town it has the
confluence In geography, a confluence (also: ''conflux'') occurs where two or more flowing bodies of water join together to form a single channel. A confluence can occur in several configurations: at the point where a tributary joins a larger river (main ...

confluence
with the
Achwa River The Achwa River is a river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without ...
. The Bahr al Ghazal, itself long, joins the Bahr al Jabal at a small lagoon called
Lake No Lake No is a lake in South Sudan. It is located just north of the vast swamp of the Sudd, at the confluence of the Bahr al Jabal (river), Bahr al Jabal and Bahr el Ghazal River, Bahr el Ghazal rivers, and marks the transition between the Bahr al J ...
, after which the Nile becomes known as the ''Bahr al Abyad'', or the
White Nile The White Nile ( ar, النيل الأبيض ') is a river in Africa, one of the two main tributaries A tributary or affluent is a stream or river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, ...

White Nile
, from the whitish
clay Clay is a type of fine-grained natural soil Surface-water- gley developed in glacial till, Northern Ireland.">Northern_Ireland.html" ;"title="glacial till, Northern Ireland">glacial till, Northern Ireland. Soil is a mixture of organic m ...

clay
suspended in its waters. When the Nile floods it leaves a rich silty deposit which fertilizes the soil. The Nile no longer floods in Egypt since the completion of the
Aswan Dam The Aswan Dam, or more specifically since the 1960s, the Aswan High Dam, is the world's largest , which was built across the in , , between 1960 and 1970. Its significance largely eclipsed the previous initially completed in 1902 downstream. Bas ...

Aswan Dam
in 1970. An
anabranch An anabranch is a section of a river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases a river flows into the ground and becomes dry at the end of its course wit ...
river, the Bahr el Zeraf, flows out of the Nile's Bahr al Jabal section and rejoins the White Nile. The flow rate of the Bahr al Jabal at
Mongalla, South Sudan Mongalla or Mangalla is a Payam in Juba County Juba County is an administrative area in Central Equatoria Central Equatoria is a state in South Sudan South Sudan (), officially known as the Republic of South Sudan, is a landlocked ...
is almost constant throughout the year and averages . After Mongalla, the Bahr Al Jabal enters the enormous swamps of the
Sudd The Sudd (' or ') is a vast swamp in South Sudan, formed by the White Nile's ''Mountain Nile, Baḥr al-Jabal'' section. The Arabic language, Arabic word ' is derived from ' (), meaning "barrier" or "obstruction". The term "the sudd" has come to ...
region of South Sudan. More than half of the Nile's water is lost in this swamp to
evaporation Evaporation is a type of that occurs on the of a as it changes into the gas phase. The surrounding gas must not be saturated with the evaporating substance. When the molecules of the liquid collide, they transfer energy to each other bas ...

evaporation
and
transpiration in a tomato The tomato is the edible berry of the plant ''Solanum lycopersicum'', commonly known as a tomato plant. The species originated in western South America South America is a continent entirely in the Western Hemisphere ...

transpiration
. The average flow rate of the White Nile at the tails of the swamps is about . From here it soon meets with the
Sobat River The Sobat River is a river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without ...
at
Malakal Malakal is a city in South Sudan and the second largest city after the national capital Juba. And it is the capital of Upper Nile (state), Upper Nile State, South Sudan, near the White Nile, White Nile River. It also serves as the headquarters of m ...

Malakal
. On an annual basis, the White Nile upstream of Malakal contributes about fifteen percent of the total outflow of the Nile. The average flow of the White Nile at Lake Kawaki Malakal, just below the Sobat River, is ; the peak flow is approximately in October and minimum flow is about in April. This fluctuation is due to the substantial variation in the flow of the Sobat, which has a minimum flow of about in March and a peak flow of over in October. During the dry season (January to June) the White Nile contributes between 70 percent and 90 percent of the total discharge from the Nile.


In Sudan

Below
Renk Renk AG (stylised as RENK AG) is a German industrial company headquartered in Augsburg. It manufactures transmission (mechanics), transmissions for trucks, military vehicles, and ships. History The company originated as a machining workshop foun ...
the White Nile enters Sudan, it flows north to Khartoum and meets the Blue Nile. The course of the Nile in Sudan is distinctive. It flows over Cataracts of the Nile, six groups of cataracts, from the sixth at Sabaloka Game Reserve, Sabaloka just north of
Khartoum Khartoum or Khartum ( ; ar, الخرطوم, Al-Khurṭūm) is the capital of Sudan Sudan (; ar, السودان, as-Sūdān), officially the Republic of the Sudan ( ar, جمهورية السودان, link=no, Jumhūriyyat as-Sūdān), is a ...

Khartoum
northward to Abu Hamed. Due to the tectonic uplift of the Nubian Swell, the river is then diverted to flow for over 300 km south-west following the structure of the Central African Shear Zone embracing the Bayuda Desert. At Al Dabbah, Sudan, Al Dabbah it resumes its northward course towards the first Cataract at Aswan forming the 'S'-shaped Great Bend of the Nile already mentioned by Eratosthenes. In the north of Sudan, the river enters Lake Nasser (known in Sudan as Lake Nubia), the larger part of which is in Egypt.


In Egypt

Below the Aswan High Dam, at the northern limit of Lake Nasser, the Nile resumes its historic course. North of
Cairo Cairo ( ; ar, القاهرة, al-Qāhirah, , : ⲕⲁϩⲓⲣⲏ) is the and of . The , with a population of 21.3 million, is the 2nd and in the , and the in the world. Cairo is associated with , as the famous and the ancient city of are ...

Cairo
, the Nile splits into two branches (or distributary, distributaries) that feed the Mediterranean: the Rosetta Branch to the west and the Damietta to the east, forming the Nile Delta.


Sediment transport

The annual sediment transport by the Nile in Egypt has been quantified. * At Aswan: 0.14 million tonnes of suspended sediment and an additional 28% of bedload * At Qena: 0.27 million tonnes of suspended sediment and an additional 27% of bedload * At Sohag: 1.5 million tonnes of suspended sediment and an additional 13% of bedload * At Beni Sweif: 0.5 million tonnes of suspended sediment and an additional 20% of bedload


Tributaries of Nile


Red Nile

Below the confluence with the Blue Nile the only major tributary is the Atbara River, also known as the Red Nile, roughly halfway to the sea, which originates in Ethiopia north of
Lake Tana Lake Tana ( am, ጣና ሐይቅ) (previously Tsana) is the largest lake A lake is an area filled with water, localized in a Depression (geology), basin, surrounded by land, and set apart from any river or other outlet that serves to feed o ...
, and is around long. The Atbara flows only while there is rain in Ethiopia and dries very rapidly. During the dry period of January to June, it typically dries up north of Khartoum.


Blue Nile

The
Blue Nile The Blue Nile (; ), is a river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course w ...

Blue Nile
( am, ዓባይ, ''ʿĀbay'') springs from
Lake Tana Lake Tana ( am, ጣና ሐይቅ) (previously Tsana) is the largest lake A lake is an area filled with water, localized in a Depression (geology), basin, surrounded by land, and set apart from any river or other outlet that serves to feed o ...
in the Ethiopian Highlands. The Blue Nile flows about 1,400 kilometres to Khartoum, where the Blue Nile and White Nile join to form the Nile. Ninety percent of the water and ninety-six percent of the transported sediment carried by the Nile originates in Ethiopia, with fifty-nine percent of the water from the Blue Nile (the rest being from the Tekezé River, Tekezé, Atbarah, Sobat River, Sobat, and small tributaries). The erosion and transportation of silt only occurs during the Ethiopian rainy season in the summer, however, when rainfall is especially high on the Ethiopian Highlands, Ethiopian Plateau; the rest of the year, the great rivers draining Ethiopia into the Nile (Sobat, Blue Nile, Tekezé, and Atbarah) have a weaker flow. In harsh and arid seasons and droughts the Blue Nile dries out completely. The flow of the Blue Nile varies considerably over its yearly cycle and is the main contribution to the large natural variation of the Nile flow. During the dry season the natural discharge of the Blue Nile can be as low as , although upstream dams regulate the flow of the river. During the wet season, the peak flow of the Blue Nile often exceeds in late August (a difference of a factor of 50). Before the placement of dams on the river the yearly discharge varied by a factor of 15 at Aswan. Peak flows of over occurred during late August and early September, and minimum flows of about occurred during late April and early May.


Bahr el Ghazal and Sobat River

The Bahr al Ghazal and the
Sobat River The Sobat River is a river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without ...
are the two most important tributaries of the White Nile in terms of discharge. The Bahr al Ghazal's
drainage basin A drainage basin is any area of land where precipitation collects and drains off into a common outlet, such as into a river, bay, or other body of water. The drainage basin includes all the surface water from surface runoff, rain runoff, snowm ...

drainage basin
is the largest of any of the Nile's sub-basins, measuring in size, but it contributes a relatively small amount of water, about annually, due to tremendous volumes of water being lost in the Sudd wetlands. The Sobat River, which joins the Nile a short distance below Lake No, drains about half as much land, , but contributes annually to the Nile. When in flood the Sobat carries a large amount of sediment, adding greatly to the White Nile's color.


Yellow Nile

The Yellow Nile is a former tributary that connected the Ouaddaï highlands of eastern Chad to the Nile River Valley c. 8000 to c. 1000 BCE. Its remains are known as the Wadi Howar. The wadi passes through Gharb Darfur near the northern border with Chad and meets up with the Nile near the southern point of the Great Bend.


History

The Nile (''iteru'' in Egyptian language, Ancient Egyptian) has been the lifeline of civilization in Egypt since the Stone Age, with most of the population and all of the cities of Egypt resting along those parts of the Nile valley lying north of Aswan. However, the Nile used to run much more westerly through what is now Wadi Hamim and Wadi al Maqar in Libya and flow into the Gulf of Sidra. As sea level rose at the end of the Quaternary glaciation, most recent ice age, the stream which is now the northern Nile river capture, pirated the ancestral Nile near Asyut. This change in climate also led to the creation of the current Sahara desert, around 3400 BC.


Ancient Niles

The existing Nile has five earlier phases; the Upper Miocenian Eonile, of about 6 million years Before Present, BP, the Upper Pliocenian Paleonile, commencing about 3.32 million years BP, and during the Pleistocene, the Nile phases Proto-, commencing about 600'000 years BP, Pre-, transitioning at about 400'000 years BP to the Neo-. Flowing north from the Ethiopian Highlands, satellite imagery was used to identify dry watercourses in the desert to the west of the Nile. A canyon, now filled by surface drift, represents the Eonile that flowed during 23–5.3 million years before present. The Eonile transported Clastic, clastic sediments to the Mediterranean; several natural gas fields have been discovered within these sediments. During the late-Miocene Messinian salinity crisis, when the Mediterranean Sea was a closed basin and evaporated to the point of being empty or nearly so, the Nile cut its course down to the new base level until it was several hundred metres below world ocean level at Aswan and below Cairo. This created a very long and deep canyon which was filled with sediment after the Mediterranean was recreated. At some point the sediments raised the riverbed sufficiently for the river to overflow westward into a depression to create Lake Moeris. Lake Tanganyika drained northwards into the Nile until the Virunga Mountains, Virunga Volcanoes blocked its course in Rwanda. The Nile was much longer at that time, with its furthest headwaters in northern Zambia. The currently existing Nile was first flowing during the former parts of the Wurm glacial period.


Integrated Nile

There are two theories about the age of the integrated Nile. One is that the integrated drainage of the Nile is of young age and that the Nile basin was formerly broken into series of separate basins, only the most northerly of which fed a river following the present course of the Nile in Egypt and Sudan. Rushdi Said postulated that Egypt itself supplied most of the waters of the Nile during the early part of its history.Said, R. (1981). ''The geological evolution of the River Nile''. Springer Verlag. The other theory is that the drainage from Ethiopia via rivers equivalent to the Blue Nile, the Atbara and the Tekezé River, Takazze flowed to the Mediterranean via the Egyptian Nile since well back into Tertiary times.Williams, M.A.J.; Williams, F. (1980). ''Evolution of Nile Basin''. In M.A.J. Williams and H. Faure (eds). ''The Sahara and the Nile''. Balkema, Rotterdam, pp. 207–224. Salama suggested that during the Paleogene and Neogene Periods (66 million to 2.588 million years ago) a series of separate closed continental basins each occupied one of the major parts of the Sudanese Rift System: Mellut rift, White Nile rift, Blue Nile rift, Atbara rift and Sag El Naam rift. The Mellut Rift Basin is nearly deep at its central part. This rift is possibly still active, with reported tectonic activity in its northern and southern boundaries. The Sudd, Sudd swamps which form the central part of the basin may still be subsiding. The White Nile Rift System, although shallower than the Bahr el Arab rift, is about deep. Geophysical exploration of the Blue Nile Rift System estimated the depth of the sediments to be . These basins were not interconnected until their subsidence ceased, and the rate of sediment deposition was enough to fill and connect them. The Egyptian Nile connected to the Sudanese Nile, which captures the Ethiopian and Equatorial headwaters during the current stages of tectonic activity in the Eastern, Central and Sudanese Rift Systems.Salama, R.B. (1997). ''Rift Basins of Sudan. African Basins, Sedimentary Basins of the World. 3.'' Edited by R.C. Selley (Series Editor K.J. Hsu) pp. 105–149. ElSevier, Amsterdam. The connection of the different Niles occurred during cyclic wet periods. The River Atbara overflowed its closed basin during the wet periods that occurred about 100,000 to 120,000 years ago. The Blue Nile connected to the main Nile during the 70,000–80,000 years B.P. wet period. The White Nile system in Bahr El Arab and White Nile Rifts remained a closed lake until the connection of the Victoria Nile to the main system some 12,500 years ago during the African humid period.


Role in the founding of Egyptian civilization

The Greek historian Herodotus wrote that "Egypt was the gift of the Nile". An unending source of sustenance, it played a crucial role in the development of Egyptian civilization. Because the river overflowed its banks annually and deposited new layers of silt, the surrounding land was very fertile. The
Ancient Egypt Ancient Egypt was a of , concentrated along the lower reaches of the , situated in the place that is now the country . Ancient Egyptian civilization followed and coalesced around 3100 (according to ) with the political unification of u ...

Ancient Egypt
ians cultivated and traded wheat, flax, papyrus and other crops around the Nile. Wheat was a crucial crop in the famine-plagued Middle East. This trading system secured Egypt's diplomatic relationships with other countries and contributed to economic stability. Far-reaching trade has been carried on along the Nile since ancient times. A tune, Hymn to the Nile, was created and sung by the ancient Egyptian peoples about the flooding of the Nile River and all of the miracles it brought to Ancient Egyptian civilization. Domestic buffalo, Water buffalo were introduced from Asia and the Assyrians introduced camels in the 7th century BC. These animals were killed for meat and were domesticated and used for ploughing—or in the camels' case, carriage. Water was vital to both people and livestock. The Nile was also a convenient and efficient means of transportation for people and goods. The Nile was also an important part of ancient Egyptian spiritual life. Hapi (Nile god), Hapi was the god of the annual floods, and both he and the pharaoh were thought to control the flooding. The Nile was considered to be a causeway from life to death and the afterlife. The east was thought of as a place of birth and growth, and the west was considered the place of death, as the god Ra, the Sun, underwent birth, death, and resurrection each day as he crossed the sky. Thus, all tombs were west of the Nile, because the Egyptians believed that in order to enter the afterlife, they had to be buried on the side that symbolized death. As the Nile was such an important factor in Egyptian life, the ancient calendar was even based on the three cycles of the Nile. These seasons, each consisting of four months of thirty days each, were called Season of the Inundation, Akhet, Season of the Emergence, Peret, and Shemu. Akhet, which means inundation, was the time of the year when the Nile flooded, leaving several layers of fertile soil behind, aiding in agricultural growth. Peret was the growing season, and Shemu, the last season, was the harvest season when there were no rains.


European search for the source of the Nile

Owing to their failure to penetrate the sudd wetlands of
South Sudan South Sudan (), officially known as the Republic of South Sudan, is a landlocked country in East Africa, east/central Africa. It is bordered to the east by Ethiopia, to the north by Sudan, to the west by the Central African Republic, to the ...

South Sudan
, the upper reaches of the White Nile remained largely unknown to the ancient Greeks and Roman Empire, Romans. Various expeditions failed to determine the river's River source, source. Agatharcides records that in the time of Ptolemy II Philadelphus, a military expedition had penetrated far enough along the course of the Blue Nile to determine that the summer floods were caused by heavy seasonal rainstorms in the
Ethiopian Highlands The Ethiopian Highlands is a rugged mass of mountain A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. A mountain differs from a plateau in having a limited summit are ...
, but no European of antiquity is known to have reached
Lake Tana Lake Tana ( am, ጣና ሐይቅ) (previously Tsana) is the largest lake A lake is an area filled with water, localized in a Depression (geology), basin, surrounded by land, and set apart from any river or other outlet that serves to feed o ...
. The ''Tabula Rogeriana'' depicted the source as three lakes in 1154. Europeans began to learn about the origins of the Nile in the fourteenth century when the Pope sent monks as emissaries to Mongolia who passed India, the Middle East and Africa, and described being told of the source of the Nile in Abyssinia (Ethiopia) Later in the fifteenth and sixteenth centuries, travelers to Ethiopia visited Lake Tana and the source of the Blue Nile in the mountains south of the lake. Although James Bruce claimed to be the first European to have visited the headwaters, modern writers give the credit to the Jesuit Pedro Páez. Páez's account of the source of the Nile is a long and vivid account of Ethiopia. It was published in full only in the early twentieth century, although it was featured in works of Páez's contemporaries, including Baltazar Téllez, Athanasius Kircher and by Johann Michael Vansleb. Europeans had been resident in Ethiopia since the late fifteenth century, and one of them may have visited the headwaters even earlier without leaving a written trace. The Portuguese João Bermudes published the first description of the Tis Issat Falls in his 1565 memoirs, compared them to the Nile Falls alluded to in Cicero's ''De Republica''. Jerónimo Lobo describes the source of the Blue Nile, visiting shortly after Pedro Páez. Telles also used his account. The White Nile was even less understood. The ancients mistakenly believed that the Niger River represented the upper reaches of the White Nile. For example, Pliny the Elder wrote that the Nile had its origins "in a mountain of lower Mauretania", flowed above ground for "many days" distance, then went underground, reappeared as a large lake in the territories of the Masaesyli, then sank again below the desert to flow underground "for a distance of 20 days' journey till it reaches the nearest Ethiopians." A merchant named Diogenes reported that the Nile's water attracted game such as buffalo. Modern exploration of the Nile basin began with the Turco-Egyptian conquest of Sudan (1820–1824), conquest of the northern and central Sudan by the Ottoman Empire, Ottoman viceroy of Egypt, Muhammad Ali of Egypt, Muhammad Ali, and his sons from 1821 onward. As a result of this, the Blue Nile was known as far as its exit from the Ethiopian foothills and the White Nile as far as the mouth of the
Sobat River The Sobat River is a river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without ...
. Three expeditions under a Turkish officer, Selim Bimbashi, were made between 1839 and 1842, and two got to the point about beyond the present port of Juba, where the country rises and rapids make navigation very difficult.
Lake Victoria Lake Victoria ( luo, Nam Lolwe; lg, 'Nnalubaale; rw, Nyanza; also ''Ukerewe'') is one of the African Great Lakes The African Great Lakes ( sw, Maziwa Makuu) are a series of lakes constituting the part of the Rift Valley lakes in and around ...

Lake Victoria
was first sighted by Europeans in 1858 when British explorer John Hanning Speke reached its southern shore while traveling with Richard Francis Burton to explore central Africa and locate the great lakes. Believing he had found the source of the Nile on seeing this "vast expanse of open water" for the first time, Speke named the lake after the then Queen Victoria, Queen of the United Kingdom. Burton, recovering from illness and resting further south on the shores of Lake Tanganyika, was outraged that Speke claimed to have proved his discovery to be the true source of the Nile when Burton regarded this as still unsettled. A very public quarrel ensued, which sparked a great deal of intense debate within the scientific community and interest by other explorers keen to either confirm or refute Speke's discovery. British explorer and missionary David Livingstone pushed too far west and entered the
Congo River The Congo River ( kg, Nzâdi Kôngo, french: Fleuve Congo, pt, Rio Congo), formerly also known as the Zaire River, is the second longest river in Africa Africa is the world's second-largest and second-most populous continent A ...
system instead. It was ultimately Welsh-American explorer Henry Morton Stanley who confirmed Speke's discovery, circumnavigating Lake Victoria and reporting the great outflow at
Ripon FallsRipon Falls at the northern end of Lake Victoria in Uganda was formerly considered the source of the river Nile. In 1862–3 John Hanning Speke was the first European to follow the course of the Nile downstream after discovering the falls that his in ...

Ripon Falls
on the lake's northern shore. European involvement in Egypt goes back to the time of Napoleon. Laird Shipyard of Liverpool sent an iron steamer to the Nile in the 1830s. With the completion of the Suez Canal and the Anglo-Egyptian War, British takeover of Egypt in 1882, more British river steamers followed. The Nile is the area's natural navigation channel, giving access to Khartoum and Sudan by steamer. The Siege of Khartoum was broken with purpose-built sternwheelers shipped from England and steamed up the river to retake the city. After this came regular steam navigation of the river. With History of Egypt under the British, British presence in Egypt in World War I and the inter-war years, river steamers provided both security and sightseeing to the Giza pyramid complex, Pyramids and Thebes, Egypt, Thebes. Steam navigation remained integral to the two countries as late as 1962. Sudan steamer traffic was a lifeline as few railways or roads were built in that country. Most paddle steamers have been retired to shorefront service, but modern diesel tourist boats remain on the river.


Since 1950

The Nile has long been used to transport goods along its length. Winter winds blow south, up river, so ships could sail up river, and down river using the flow of the river. While most Egyptians still live in the Nile valley, the 1970 completion of the Aswan High Dam ended the summer floods and their renewal of the fertile soil, fundamentally changing farming practices. The Nile supports much of the population living along its banks, enabling Egyptians to live in otherwise inhospitable regions of the Sahara. The river's flow is disturbed at several points by the Cataracts of the Nile, which are sections of faster-flowing water with many small islands, shallow water, and rocks, which form an obstacle to navigation by boats. The
Sudd The Sudd (' or ') is a vast swamp in South Sudan, formed by the White Nile's ''Mountain Nile, Baḥr al-Jabal'' section. The Arabic language, Arabic word ' is derived from ' (), meaning "barrier" or "obstruction". The term "the sudd" has come to ...
wetlands in Sudan also forms a formidable navigation obstacle and impede water flow, to the extent that Sudan had once attempted to canalize (the Jonglei Canal) to bypass the swamps. Nile cities include Khartoum, Aswan, Luxor (Thebes, Egypt, Thebes), and the Giza
Cairo Cairo ( ; ar, القاهرة, al-Qāhirah, , : ⲕⲁϩⲓⲣⲏ) is the and of . The , with a population of 21.3 million, is the 2nd and in the , and the in the world. Cairo is associated with , as the famous and the ancient city of are ...

Cairo
conurbation. The first cataract, the closest to the mouth of the river, is at Aswan, north of the Aswan Dam. This part of the river is a regular tourist route, with cruise ships and traditional wooden sailing boats known as feluccas. Many cruise ships ply the route between Luxor and Aswan, stopping at Edfu and Kom Ombo along the way. Security concerns have limited cruising on the northernmost portion for many years. A computer simulation study to plan the economic development of the Nile was directed by H.A.W. Morrice and W.N. Allan, for the Ministry of Hydro-power of the Republic of the Sudan, during 1955–1957 Morrice was their Hydrological Adviser, and Allan his predecessor. M.P. Barnett directed the software development and computer operations. The calculations were enabled by accurate monthly inflow data collected for 50 years. The underlying principle was the use of over-year storage, to conserve water from rainy years for use in dry years. Irrigation, navigation and other needs were considered. Each computer run postulated a set of reservoirs and operating equations for the release of water as a function of the month and the levels upstream. The behavior that would have resulted given the inflow data was modeled. Over 600 models were run. Recommendations were made to the Sudanese authorities. The calculations were run on an IBM 650 computer. Simulation studies to design water resources are discussed further in the article on hydrology transport models, which have been used since the 1980s to analyze water quality. Despite the development of many reservoirs, drought during the 1980s led to widespread starvation in Ethiopia and Sudan, but Egypt was nourished by water impounded in Lake Nasser. Drought has proven to be a major cause of fatality in the Nile river basin. According to a report by the Strategic Foresight Group around 170 million people have been affected by droughts in the last century with half a million lives lost.Blue Peace for the Nile, 2009
; Report by Strategic Foresight Group
From the 70 incidents of drought which took place between 1900 and 2012, 55 incidents took place in Ethiopia, Sudan, South Sudan, Kenya and Tanzania.


Water sharing dispute

The Nile's water has affected the politics of East Africa and the Horn of Africa for many decades. The dispute between Egypt and Ethiopia over the $4.5 billion Grand Ethiopian Renaissance Dam has become a national preoccupation in both countries, stoking patriotism, deep-seated fears and even murmurs of war. Countries including Uganda, Sudan, Ethiopia and Kenya have complained about Egyptian domination of its water resources. The Nile Basin Initiative promotes a peaceful cooperation among those states. Several attempts have been made to establish agreements between the countries sharing the Nile waters. On 14 May 2010 at Entebbe,
Uganda Uganda (Languages of Uganda, Ugandan Languages: Yuganda), officially the Republic of Uganda ( sw, Jamhuri ya Uganda), is a landlocked country in East Africa. It is bordered to the east by Kenya, to the north by South Sudan, to the west by the ...

Uganda
,
Ethiopia Ethiopia, officially the Federal Democratic Republic of Ethiopia, is a in the . It shares borders with and to the north, to the northeast, to the east, to the south, to the west and to the . Ethiopia has a total area of and over ...

Ethiopia
,
Rwanda Rwanda, officially the Republic of Rwanda, is a landlocked country A landlocked country is a country A country is a distinct territory, territorial body or political entity. It is often referred to as the land of an individual's bi ...

Rwanda
, and
Tanzania Tanzania (;This approximates the Kiswahili pronunciation. However, is also heard in English. ), officially the United Republic of Tanzania ( sw, Jamhuri ya Muungano wa Tanzania), is a country in East Africa within the African Great Lakes regi ...

Tanzania
signed a new agreement on sharing the Nile water even though this agreement raised strong opposition from Egypt and Sudan. Ideally, such international agreements should promote equitable and efficient usage of the Nile basin's water resources. Without a better understanding about the availability of the future water resources of the Nile, it is possible that conflicts could arise between these countries relying on the Nile for their water supply, economic and social developments.


Modern achievements and exploration


White Nile

In 1951, the American John Goddard (adventurer), John Goddard together with two French explorers became the first to successfully navigate the entire Nile river from its source in Burundi at the potential headsprings of the Kagera River in
Burundi Burundi (, ), officially the Republic of Burundi ( rn, Repubulika y’u Burundi, ; Swahili: Jamuhuri ya Burundi; french: link=no, République du Burundi, or ), is a landlocked country in the Great Rift Valley where the African Great Lakes reg ...

Burundi
to its mouth on the
Mediterranean Sea The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the ...
, a journey of approximately . Their 9-month journey is described in the book ''Kayaks down the Nile''. The
White Nile The White Nile ( ar, النيل الأبيض ') is a river in Africa, one of the two main tributaries A tributary or affluent is a stream or river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, ...

White Nile
Expedition, led by South African national Hendrik Coetzee, navigated the White Nile's entire length of approximately . The expedition began at the White Nile's beginning at
Lake Victoria Lake Victoria ( luo, Nam Lolwe; lg, 'Nnalubaale; rw, Nyanza; also ''Ukerewe'') is one of the African Great Lakes The African Great Lakes ( sw, Maziwa Makuu) are a series of lakes constituting the part of the Rift Valley lakes in and around ...

Lake Victoria
in
Uganda Uganda (Languages of Uganda, Ugandan Languages: Yuganda), officially the Republic of Uganda ( sw, Jamhuri ya Uganda), is a landlocked country in East Africa. It is bordered to the east by Kenya, to the north by South Sudan, to the west by the ...

Uganda
, on 17 January 2004 and arrived safely at the Mediterranean in Rosetta, four and a half months later.


Blue Nile

The
Blue Nile The Blue Nile (; ), is a river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course w ...

Blue Nile
Expedition, led by geologist Pasquale Scaturro and his partner, kayaker and documentary filmmaker Gordon Brown became the first known people to descend the entire Blue Nile, from
Lake Tana Lake Tana ( am, ጣና ሐይቅ) (previously Tsana) is the largest lake A lake is an area filled with water, localized in a Depression (geology), basin, surrounded by land, and set apart from any river or other outlet that serves to feed o ...
in
Ethiopia Ethiopia, officially the Federal Democratic Republic of Ethiopia, is a in the . It shares borders with and to the north, to the northeast, to the east, to the south, to the west and to the . Ethiopia has a total area of and over ...

Ethiopia
to the beaches of
Alexandria Alexandria ( or ; ar, الإسكندرية ; arz, اسكندرية ; : Rakodī; el, Αλεξάνδρεια ''Alexandria'') is the in after and , in , and a major economic centre. With a total population of 5,200,000, Alexandria is the ...

Alexandria
on the Mediterranean. Their approximately journey took 114 days, from 25 December 2003 to 28 April 2004. Though their expedition included others, Brown and Scaturro were the only ones to complete the entire journey. Although they descended whitewater manually, the team used outboard motors for much of their journey. On 29 January 2005, Canadians, Canadian Les Jickling and New Zealander Mark Tanner completed the first human powered transit of Ethiopia's Blue Nile. Their journey of over took five months. They recount that they paddled through two war zones, regions notorious for bandits, and were arrested at gunpoint.


Crossings


Crossings from Khartoum to the Mediterranean Sea

The following bridges cross the Blue Nile and connect Khartoum to Khartoum North: * Mac Nimir Bridge * Blue Nile Road & Railway Bridge * Burri Bridge * Elmansheya Bridge * Soba (city), Soba Bridge The following bridges cross the White Nile and connect Khartoum to Omdurman: * White Nile Bridge * Fitayhab Bridge * Al Dabbaseen Bridge (under construction) * Omhuraz Bridge (proposed) the following bridges cross from Omdurman: to Khartoum North: * Shambat Bridge * Halfia Bridge The following bridges cross to Tuti from Khartoum states three cities * Tuti Bridge, Khartoum-Tuti Bridge * Omdurman-Tuti Suspension Bridge (proposed) * Khartoum North-Tuti Bridge (proposed) Other bridges * Shandi Bridge, Shendi * Atbarah Bridge, Atbarah * Merowe Dam, Merowe, Sudan, Merowe * Merowe Bridge, Merowe * Aswan Bridge, Aswan * Luxor Bridge, Luxor * Suhag Bridge, Suhag, Egypt, Suhag * Assiut Bridge, Assiut * Al Minya Bridge, Minya, Egypt, Minya * Al Marazeek Bridge, Helwan * First Ring Road Bridge (Moneeb Crossing),
Cairo Cairo ( ; ar, القاهرة, al-Qāhirah, , : ⲕⲁϩⲓⲣⲏ) is the and of . The , with a population of 21.3 million, is the 2nd and in the , and the in the world. Cairo is associated with , as the famous and the ancient city of are ...

Cairo
* Abbas Bridge, Cairo * University Bridge, Cairo * Qasr al-Nil Bridge, Cairo * 6th October Bridge, Cairo * Boulak Bridge, Abu El Ela Bridge, Cairo (removed in 1998) * New Abu El Ela Bridge, Cairo * Imbaba Bridge, Cairo * Rod Elfarag Bridge, Cairo * Second Ring Road Bridge, Cairo * Banha Bridge, Banha * Samanoud Bridge, Samanoud * Mansoura 2 Bridges, Mansoura * Talkha Bridge, Talkha * Shirbine high Bridge * Shirbine Bridge * Kafr Sad – Farscor Bridge * International Coastal Road Bridge * Damietta high Bridge, Damietta * Damietta Bridge, Damietta * Kafr El Zayat Bridges, Kafr El Zayat * Zefta Bridge, Zefta


Crossings from Jinja, Uganda to Khartoum

* Source of the Nile Bridge, Jinja District, Jinja, Uganda * River Nile Railway Bridge, Jinja District, Jinja, Uganda * Nalubaale Bridge,
Jinja, Uganda Jinja is a city in the Eastern Region of Uganda Uganda (Languages of Uganda, Ugandan Languages: Yuganda ), officially the Republic of Uganda ( sw, Jamhuri ya Uganda), is a landlocked country in East Africa, East-Central Africa. It is borde ...
(Formerly Owen Falls, Owen Falls Bridge) * Karuma Bridge, Karuma, Uganda * Pakwach Bridge, Uganda


Gallery

File:Village on the Nile, 1891.jpg, Village on the Nile, 1891 File:Nile riverboat, 1900.jpg, Riverboat on the Nile, Egypt 1900 File:EternalNile.JPG, Marsh along the Nile File:Nile in Uganda - by Michael Shade.jpg, A river boat crossing the Nile in Uganda File:Murchison Falls 573x430.jpg, in Uganda, between
Lake Victoria Lake Victoria ( luo, Nam Lolwe; lg, 'Nnalubaale; rw, Nyanza; also ''Ukerewe'') is one of the African Great Lakes The African Great Lakes ( sw, Maziwa Makuu) are a series of lakes constituting the part of the Rift Valley lakes in and around ...

Lake Victoria
and
Lake Kyoga Lake Kyoga (also spelled Kioga) is a large shallow lake A lake is an area filled with water, localized in a basin, surrounded by land, apart from any river A river is a natural flowing watercourse, usually freshwater, flowing towards ...
File:Luxor_West_Bank_R01.jpg, The Nile in Luxor File:Nile SPOT 1173.jpg, The Nile at Dendera, as seen from the SPOT (satellite), SPOT satellite File:Cairo Nile River.jpg, The Nile flows through Cairo, here contrasting ancient customs of daily life with the modern city of today. File:Cairo-Nile-2020(1).jpg, Nile in
Cairo Cairo ( ; ar, القاهرة, al-Qāhirah, , : ⲕⲁϩⲓⲣⲏ) is the and of . The , with a population of 21.3 million, is the 2nd and in the , and the in the world. Cairo is associated with , as the famous and the ancient city of are ...

Cairo


Annotated bibliography

The following is an annotated bibliography of key written documents for the Western exploration of the Nile. 17th century * ''Historia da Ethiopia'', Pedro Páez (aka Pero Pais), Portugal, 1620 :A Jesuit missionary who was sent from Goa to
Ethiopia Ethiopia, officially the Federal Democratic Republic of Ethiopia, is a in the . It shares borders with and to the north, to the northeast, to the east, to the south, to the west and to the . Ethiopia has a total area of and over ...

Ethiopia
in 1589 and remained in the area until his death in 1622. Credited with being the first European to view the source of the Blue Nile which he describes in this volume. * ''Voyage historique d'Abissinie'', Jerónimo Lobo (aka Girolamo Lobo), Piero Matini, Firenze; 1693 :One of the most important and earliest sources on Ethiopia and the Nile. Jerónimo Lobo (1595–1687), a Jesuit priest, stayed in Ethiopia, mostly in Tigray Province, Tigre, for 9 years and travelled to
Lake Tana Lake Tana ( am, ጣና ሐይቅ) (previously Tsana) is the largest lake A lake is an area filled with water, localized in a Depression (geology), basin, surrounded by land, and set apart from any river or other outlet that serves to feed o ...
and the Blue Nile, reaching the province of Danot (woreda), Damot. When the Jesuits were expelled from the country, he too had to leave and did so via Massaua and Suakin. "He was the best expert on Ethiopian matters. After Pais, Lobo is the second European to describe the sources of the Blue Nile and he did so more exactly than Bruce" (transl. from Henze). 18th century * ''Travels to Discover the Source of the Nile, Travels to Discover the Source of the Nile in the Years – 1768, 1770, 1771, 1772, and 1773'', James Bruce of Kinnaird. J. Ruthven for G. GJ. and J. Robinson et al., Edinburgh, 1790 (5 Volumes) :With time on his hands and at the urging of a friend, Bruce composed this account of his travels on the African continent, including comments on the history and religion of Egypt, an account of Indian trade, a history of Ethiopia, Abyssinia, and other material. Although Bruce would not be confused with "a great scholar or a judicious critic, few books of equal compass are equally entertaining; and few such monuments exist of the energy and enterprise of a single traveller" (DNB). "The result of his travels was a very great enrichment of the knowledge of geography and ethnography" (Cox II, p. 389.) Bruce was one of the earliest westerners to search for the source of the Nile. In November 1770 he reached the source of the Blue Nile, and though he acknowledged that the White Nile was the larger stream, he claimed that the Blue Nile was the Nile of the ancients and that he was thus the discoverer of its source. The account of his travels was written twelve years after his journey and without reference to his journals, which gave critics grounds for disbelief, but the substantial accuracy of the book has since been amply demonstrated. 1800–1850 * ''Egypt And Mohammed Ali, Or Travels in the Valley of The Nile'', James Augustus St. John, Longman, London, 1834 :St. John traveled extensively in Egypt and Nubia in 1832–33, mainly on foot. He gives a very interesting picture of Egyptian life and politics under Muhammad Ali of Egypt, Mohammed Ali; a large part of volume II deals with the Egyptian campaign in Syria. * ''Travels in Ethiopia Above the Second Cateract of the Nile; Exhibiting the State of That Country and Its Various Inhabitants Under the Dominion of Muhammad Ali of Egypt, Mohammed Ali; and Illustrating the Antiquities, Arts, and History of the Ancient Kingdom of Meroe'', G.A. Hoskins. Longman, Rees, Orme, Brown, Green, & Longman, London; 1835. * ''Modern Egypt and Thebes: Being a Description of Egypt; Including Information Required for Travelers in That Country'', Sir Gardner Wilkinson, John Murray, London, 1843 :The first known English travelers guide to the Lower Nile Basin. 1850–1900 * ''Lake Regions of Central Equatorial Africa, with Notices of The Lunar Mountains and the Sources of the White Nile; being The Results of an Expedition Undertaken under the Patronage of Her Majesty's Government and the Royal Geographical Society of London, In the Years 1857–1859'', Sir Richard Burton. William Clowes Ltd., W. Clowes, London; 1860 :Sir Richard Burton's presentation of his expedition with John Speke. Ultimately, Burton's view of the sources of the Nile failed and Speke's prevailed. * ''Travels, researches, and missionary labours, during eighteen years' residence in eastern Africa. Together with journeys to Jagga, Usambara, Ukambani, Shoa, Abessinia, and Khartum; and a coasting voyage from Mombaz to Cape Delgado. With an appendix respecting the snow-capped mountains of eastern Africa; the sources of the Nile; the languages and literature of Abessinia And eastern Africa, etc. etc.'', Johann Ludwig Krapf, Rev Dr. J. Krapf, Trubner and Co, London; 1860; Ticknor and Fields, Boston; 1860 :Krapf went to East Africa in the service of the English Church Missionary Society, arriving at Mombasa,
Kenya ) , national_anthem = "Ee Mungu Nguvu Yetu "Ee Mungu Nguvu Yetu" (, ) is the national anthem of Kenya. History "Ee Mungu Nguvu Yetu"'s lyrics were originally written in Swahili language, Kiswahili, the national language of Kenya ...

Kenya
in 1844 and staying in East Africa until 1853. While stationed there he was the first to report the existence of Lake Baringo and a sighting of the snow-clad Kilimanjaro. Krapf, during his travels, collected information from the Arab traders operating inland from the coast. From the traders Krapf and his companions learned of great lakes and snow-capped mountains, which Krapf claimed to have seen for himself, much to the ridicule of English explorers who could not believe the idea of snow on the equator. However, Krapf was correct and had seen Mounts Kilimanjaro and Kenya, the first European to do so. * ''Egypt, Soudan and Central Africa: With Explorations From Khartoum on the White Nile to the Regions of the Equator, Being Sketches from Sixteen Years' Travel'', John Petherick. William Blackwood, Edinburgh; 1861 :Petherick was a well known Welsh traveler in East Central Africa where he had adopted the profession of mining engineer. This work describes sixteen years of his travel throughout Africa. In 1845, he entered the service of Mehemet Ali, and was employed in examining Upper Egypt, Nubia, the Red Sea coast and Kordofan in an unsuccessful search for coal. In 1848, he left the Egyptian service and established himself at El Obeid as a trader and was, at the same time made British Consul for the Sudan. In 1853, he removed to
Khartoum Khartoum or Khartum ( ; ar, الخرطوم, Al-Khurṭūm) is the capital of Sudan Sudan (; ar, السودان, as-Sūdān), officially the Republic of the Sudan ( ar, جمهورية السودان, link=no, Jumhūriyyat as-Sūdān), is a ...

Khartoum
and became an ivory trader. He traveled extensively in the Bahr el Ghazal (region of South Sudan), Bahr-el-Ghazal region, then almost unknown, exploring the Jur River, Jur, Yalo and other affluents of the Ghazal and in 1858 he penetrated the Zande people, Niam-Niam country. Petherick's additions to the knowledge of natural history were considerable, being responsible for the discovery of a number of new species. In 1859, he returned to England where he became acquainted with John Speke, then arranging for an expedition to discover the source of the Nile. While in England, Petherick married and published this account of his travels. He got the idea to join Speke in his travels, and in this volume is an actual subscription and list of subscribers to raise money to send Petherick to join Speke. His subsequent adventures as a consul in Africa were published in a later work. * ''Journal of the Discovery of the Source of the Nile'', John Hanning Speke. William Blackwood, Edinburgh, 1863; Harper & Brothers, New York; 1864 :Speke had previously made an expedition with Sir Richard Burton under the auspices of the Indian government, during which Speke was convinced that he had discovered the source of the Nile. Burton, however, disagreed and ridiculed Speke's account. Speke set off on another expedition, recounted here, in the company of Captain Grant. During the course of this expedition he not only produced further evidence for his discoveries but he also met (later Sir) Samuel Baker, Samuel and Florence Baker. Speke and Burton provided them with essential information which helped Baker in the discovery of the Albert Nyanza.Dorothy Middleton, 'Baker, Florence Barbara Maria, Lady Baker (1841–1916)’, Oxford Dictionary of National Biography, Oxford University Press, 200
accessed 11 Sept 2015
The importance of Speke's discoveries can hardly be overestimated. In discovering the source reservoir of the Nile he succeeded in solving the problem of all ages; he and Grant were the first Europeans to cross Equatorial Eastern Africa and gained for the world a knowledge of about of a portion of Eastern Africa previously totally unknown.


See also

* Bujagali Hydroelectric Power Station * Egyptian Public Works * Kiira Hydroelectric Power Station * Water politics in the Nile Basin * Merowe Dam * Nalubaale Hydroelectric Power Station * Orders of magnitude (length), Orders of magnitude * Vid Flumina, a river of liquid methane and ethane on Saturn's moon Titan * ''The River War'' (1899), Winston Churchill's second book, an account of steaming up the Nile to the Battle of Omdurman, Sudan, in 1898


Notes and references

;Notes ;References ;Sources


Further reading

* * Tim Jeal, Jeal, Tim (2011). ''Explorers of the Nile: The Triumph and Tragedy of a Great Victorian Adventure''. * Moorehead, Alan, "The White Nile" (Hamish Hamilton, 1960; revised and illustrated edition, 1971). Abridged illustrated edition, as The Story of the White Nile (Harper & Row, 1967) * Moorehead, Alan, "The Blue Nile" (Hamish Hamilton, 1962; revised and illustrated edition, 1972). Abridged illustrated edition, as The Story of the Blue Nile (Harper & Row, 1966) * Tvedt, Terje, ed. ''The River Nile in the Post-Colonial Age: Conflict and Cooperation Among the Nile Basin Countries'' (I.B. Tauris, 2010) 293 pages; studies of the river's finite resources as shared by multiple nations in the post-colonial era; includes research by scholars from Burundi, Congo, Egypt, Ethiopia, Kenya, Rwanda, Sudan, Tanzania, and Uganda. * Tvedt, Terje, (2004) "The Nile: An Annotated Bibliography", London/New York,


External links


A Struggle Over the Nile
– slideshow by ''The New York Times''
Thesis Analyzing Nile River Negotiations
*
Old maps of the Nile
from the Eran Laor Cartographic Collection, The National Library of Israel {{Authority control Nile, International rivers of Africa Nile basin, * Rivers of Egypt Rivers of Sudan Rivers of South Sudan Rivers of Uganda Geography of ancient Egypt Hebrew Bible rivers National parks of Egypt Water transport in Egypt Articles containing video clips Rivers of Africa