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The Cataracts of the Nile are shallow lengths (or
whitewater Whitewater forms in a rapid context, in particular, when a river's gradient changes enough to generate so much turbulence that air is trapped within the water. This forms an unstable current that froths, making the water appear opaque and ...
rapids) of the
Nile The Nile, , Bohairic , lg, Kiira , Nobiin: Áman Dawū is a major north-flowing river in northeastern Africa. It flows into the Mediterranean Sea. The Nile is the longest river in Africa and has historically been considered the longest ...
river, between
Khartoum Khartoum or Khartum ( ; ar, الخرطوم, Al-Khurṭūm, din, Kaartuɔ̈m) is the capital of Sudan. With a population of 5,274,321, its metropolitan area is the largest in Sudan. It is located at the confluence of the White Nile, flowing n ...
and
Aswan Aswan (, also ; ar, أسوان, ʾAswān ; cop, Ⲥⲟⲩⲁⲛ ) is a city in Southern Egypt, and is the capital of the Aswan Governorate. Aswan is a busy market and tourist centre located just north of the Aswan Dam on the east bank of the ...
, where the surface of the water is broken by many small boulders and stones jutting out of the river bed, as well as many rocky
islet An islet is a very small, often unnamed island. Most definitions are not precise, but some suggest that an islet has little or no vegetation and cannot support human habitation. It may be made of rock, sand and/or hard coral; may be permanen ...
s. In some places, these stretches are punctuated by whitewater, while at others the water flow is smoother but still shallow.


The Six Cataracts

Counted going upstream (from north to south): In
Egypt Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia via a land bridge formed by the Sinai Peninsula. It is bordered by the Medit ...
: *The First Cataract cuts through
Aswan Aswan (, also ; ar, أسوان, ʾAswān ; cop, Ⲥⲟⲩⲁⲛ ) is a city in Southern Egypt, and is the capital of the Aswan Governorate. Aswan is a busy market and tourist centre located just north of the Aswan Dam on the east bank of the ...
(). Its former location was selected for the construction of
Aswan Low Dam The Aswan Low Dam or Old Aswan Dam is a gravity masonry buttress dam on the Nile River in Aswan, Egypt. The dam was built at the former first cataract of the Nile, and is located about 1000 km up-river and 690 km (direct distance) sou ...
, the first dam built across the Nile. In Sudan: *The Second Cataract (or Great Cataract) was in
Nubia Nubia () (Nobiin: Nobīn, ) is a region along the Nile river encompassing the area between the first cataract of the Nile (just south of Aswan in southern Egypt) and the confluence of the Blue and White Niles (in Khartoum in central Sudan), or ...
and is now submerged under Lake Nasser. () *The Third Cataract is at
Tombos Tombos is a municipality in southeast Minas Gerais state, Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 ...
/Hannek. () *The Fourth Cataract is in the Manasir Desert, and since 2008, is submerged under the reservoir of
Merowe Dam The Merowe Dam, also known as Merowe High Dam, Merowe Multi-Purpose Hydro Project or Hamdab Dam, is a large dam near Merowe Town in northern Sudan, about north of the capital Khartoum. Its dimensions make it the largest contemporary hydropower pr ...
. () *The Fifth Cataract is near the confluence of the
Nile The Nile, , Bohairic , lg, Kiira , Nobiin: Áman Dawū is a major north-flowing river in northeastern Africa. It flows into the Mediterranean Sea. The Nile is the longest river in Africa and has historically been considered the longest ...
and
Atbarah River The Atbarah River ( ar, نهر عطبرة; transliterated: Nahr 'Atbarah), also known as the Black Nile, is a river in northeast Africa. It rises in northwest Ethiopia, approximately 50 km north of Lake Tana and 30 km west of Gondar. ...
s. () *The Sixth Cataract is where the Nile cuts through the Sabaluka pluton, close to Bagrawiyah. ()


Geology

Geologists indicate that the region of northern Sudan is
tectonically Tectonics (; ) are the processes that control the structure and properties of the Earth's crust and its evolution through time. These include the processes of mountain building, the growth and behavior of the strong, old cores of continents ...
active and this activity has caused the river to take on "youthful" characteristics. The
Nubian Swell The Nubian Swell is a geologic structural uplift in northern Africa that trends east to west and separates the lower Nile of Egypt from the Sudan basin. The Nubian Swell has been geologically active since early Mesozoic times, and portions of it a ...
has diverted the river's course to the west, while keeping its depth shallow and causing the formation of the cataracts. Even as the river bed is worn down by
erosion Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location where it is deposited. Erosion is dis ...
, the landmass is lifted, keeping parts of the river bed exposed. These distinctive features of the river between Aswan and Khartoum have led to the stretch being often referred to as the Cataract Nile, while the downstream portion is occasionally referred to as the "Egyptian" Nile. The geological distinction between these two portions of the river is considerable. North of Aswan, the river bed is not rocky, but is instead composed of sediment, and far from being a shallow river. It is believed that the bedrock was previously eroded to be several thousand feet deep. This created a vast canyon that is now filled with sediment. Despite these characteristics, some of the cataracts which are normally impassable by boat because of the shallow water have become navigable during the flood season.


History

The word "cataract" comes from the Greek word ''καταρρέω'' ("to flow down"), although the original Greek term was the plural-only ''Κατάδουποι''. However, contrary to this, none of the
Nile The Nile, , Bohairic , lg, Kiira , Nobiin: Áman Dawū is a major north-flowing river in northeastern Africa. It flows into the Mediterranean Sea. The Nile is the longest river in Africa and has historically been considered the longest ...
's six primary cataracts could be accurately described as waterfalls, and given a broader definition, this is the same with many of the minor cataracts. In ancient times,
Upper Egypt Upper Egypt ( ar, صعيد مصر ', shortened to , , locally: ; ) is the southern portion of Egypt and is composed of the lands on both sides of the Nile that extend upriver from Lower Egypt in the north to Nubia in the south. In ancient E ...
extended from south of the Nile Delta to the first cataract, while further upstream, the land was controlled by the ancient
Kingdom of Kush The Kingdom of Kush (; Egyptian: 𓎡𓄿𓈙𓈉 ''kꜣš'', Assyrian: ''Kûsi'', in LXX grc, Κυς and Κυσι ; cop, ''Ecōš''; he, כּוּשׁ ''Kūš'') was an ancient kingdom in Nubia, centered along the Nile Valley in wh ...
that would later take over
Egypt Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia via a land bridge formed by the Sinai Peninsula. It is bordered by the Medit ...
from 760 to 656 BC. Besides the Kushite invasion, for most of Egyptian history, the Nile's cataracts, particularly the First Cataract, primarily served as a natural border to prevent most crossings from the south, as those in said region would rely on river travel to venture north and south. This allowed Egypt's southern border to be relatively protected from invasions, and besides brief Kushite rule, it remained a natural border for most of Egyptian history. Eratosthenes gave a precise description of the Cataract-Nile: The six cataracts of the Nile are depicted extensively by European visitors, notably by
Winston Churchill Sir Winston Leonard Spencer Churchill (30 November 187424 January 1965) was a British statesman, soldier, and writer who served as Prime Minister of the United Kingdom twice, from 1940 to 1945 during the Second World War, and again from ...
in ''
The River War ''The River War: An Historical Account of the Reconquest of the Soudan'' (1899), by Winston Churchill. It is a history of the conquest of the Sudan between 1896 and 1899 by Anglo-Egyptian forces led by Lord Kitchener. He defeated the Sudanese ...
'' (1899), where he recounts the exploits of the British trying to return to the Sudan between 1896 and 1898, after they were forced to leave in 1885. Today, Lake Nasser has filled most of the area between the first and second cataracts (known as
Lower Nubia Lower Nubia is the northernmost part of Nubia, roughly contiguous with the modern Lake Nasser, which submerged the historical region in the 1960s with the construction of the Aswan High Dam. Many ancient Lower Nubian monuments, and all its modern p ...
), and its monuments moved as part of the
International Campaign to Save the Monuments of Nubia The International Campaign to Save the Monuments of Nubia was the relocation of 22 monuments in Lower Nubia, in Southern Egypt and northern Sudan, between 1960 and 1980. The success of the project, in particular the creation of a coalition of 50 ...
.


Gallery

File:Nile_First_Cataract_R03.jpg, First Cataract File:"Second Cataract Of Nile" - -26 LACMA M.2008.40.978 (2 of 2).jpg, Second cataract in 1854 by John Beasley Greene File:ThirdCataract.jpg, Third Cataract File:Nile sunset dar almanasir.JPG, Fourth Cataract File:5emeCataracte Soudan.jpg, Fifth Cataract File:Cataract6.jpg, Sixth Cataract in 1908 by
Sir Henry Rider Haggard Sir Henry Rider Haggard (; 22 June 1856 – 14 May 1925) was an English writer of adventure fiction romances set in exotic locations, predominantly Africa, and a pioneer of the lost world literary genre. He was also involved in land reform t ...


References

{{DEFAULTSORT:Cataracts of the Nile Nile Nubia Rapids Rivers of Egypt Rivers of Sudan