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Nile River

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Dictionary: Nile   (nīl) pronunciation


The longest river in the world, flowing about 6,677 km (4,150 mi) through eastern Africa from its most remote sources in Burundi to a delta on the Mediterranean Sea in northeast Egypt. The main headstreams, the Blue Nile and the White Nile, join at Khartoum in Sudan to form the Nile proper. The river has been used for irrigation in Egypt since at least 4000 B.C., a function now regulated largely by the Aswan High Dam.

 

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Nile River
River, eastern and northeastern Africa. The longest river in the world, it is about 4,132 mi (6,650 km) long from its remotest headstream (which flows into Lake Victoria) to the Mediterranean Sea. After leaving the lake, it flows generally north through Uganda, The Sudan, and Egypt. Its major tributaries — including the Al-Ghazal (Gazelle) River, the Blue Nile, and the Atbara River — join it before it enters Lake Nasser near the Egypt-Sudan border. Below the Aswan High Dam, which impounds the lake, it continues northward to its delta near Cairo, where it empties into the Mediterranean. The first use of the Nile for irrigation in Egypt began when seeds were sown in the mud left after its annual floodwaters had subsided. It has supported continuous human settlement for at least 5,000 years, and networks of canals and waterworks have been built since the 19th century. The Aswan High Dam, built in 1959 – 70, provides flood protection, hydroelectric power, and a dependable water supply for both crops and humans. The Nile is also a vital waterway for the transport of people and goods.

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Nile, longest river in the world, c.4,160 mi (6,695 km) long from its remotest headstream, the Luvironza River in Burundi, central Africa, to its delta on the Mediterranean Sea, NE Egypt. The Nile flows northward and drains c.1,100,000 sq mi (2,850,000 sq km), about one tenth of Africa, including parts of Egypt, Sudan, Ethiopia, Eritrea, Kenya, Uganda, Rwanda, Burundi, Tanzania, and Congo (Kinshasa). Its waters support practically all agriculture in the most densely populated parts of Egypt, furnish water for more than 20% of Sudan's total crop area, and are widely used throughout the basin for navigation and hydroelectric power.

Course and Navigability

The trunk stream of the the Nile is formed at Khartoum, Sudan, 1,857 mi (2,988 km) from the sea, by the junction of the Blue Nile (c.1,000 mi/1,610 km long) and the White Nile (c.2,300 mi/3,700 km long). The Blue Nile rises in the headwaters of Lake Tana, NW Ethiopia, a region of heavy summer rains, and is the source of floodwaters that reach Egypt in September; the Blue Nile contributes more than half of all Nile waters throughout the year. During floodtime it also carries great quantities of silt from the highlands of Ethiopia; these now collect in Lake Nasser behind the Aswan High Dam, but for centuries they were left on the floodplain after the floods and helped replenish the fertility of Egypt's soils. The Merowe Dam, under construction below the fourth cataract in Sudan, will also capture the silt, though the dam there is designed to facilitate the flushing of sediment. The White Nile (known in various sections as the Bahr-el-Abiad, Bahr-el-Jebel, Albert Nile, and Victoria Nile) rises in the headwaters of Lake Victoria in a region of heavy, year-round rainfall; unlike the Blue Nile, it has a constant flow, owing in part to its source area and in part to the regulating effects of its passage through lakes Victoria and Albert and the Sudd swamps. Other important tributaries of the Nile are the Atbara and Sobat rivers. The Gezira, or "island," formed between the Blue Nile and the White Nile as they come together at Khartoum is Sudan's principal agricultural area and the only large tract of land outside Egypt irrigated with Nile waters.

From Khartoum to the Egyptian border at Wadi Halfa (now submerged) and on to Aswan in Egypt, the Nile occupies a narrow entrenched valley with little floodplain for cultivation; in this stretch it is interrupted by six cataracts (rapids). From Aswan the river flows north 550 mi (885 km) to Cairo, bordered by a floodplain that gradually widens to c.12 mi (20 km); irrigated by the river, this intensively cultivated valley contrasts with the barren desert on either side. North of Cairo is the great Nile delta (c.100 mi/160 km long and up to 115 mi/185 km wide), which contains 60% of Egypt's cultivated land and extensive areas of swamps and shallow lakes. Two distributaries, the Dumyat (Damietta) on the east and the Rashid (Rosetta) on the west, each c.150 mi (240 km) long, carry the river's remaining water (after irrigation) to the Mediterranean Sea. Regular steamship service is maintained on the Nile between Alexandria (reached by canal) and Aswan; the Blue Nile is navigable June through December from Suki (above Sennar Dam) to Roseires Dam; the White Nile is navigable all year between Khartoum and Juba in Sudan and between Nimule and Kabalega (formerly Murchison) Falls on the Victoria Nile.

Irrigation along the Nile

The use of the Nile for irrigation, now regulated by the Nile Waters Treaty of 1959, dates back to at least 4000 B.C. in Egypt. The traditional system of basin irrigation-in which Nile floods were trapped in shallow basins and a cool-season crop of wheat or barley was grown in soaked and silt-replenished soil-has been replaced since the mid-1800s by a system of perennial irrigation and the production of two or three crops a year, including cotton, sugarcane, and peanuts. The delta barrages, just below Cairo, channel water into a system of feeder canals for the delta, and other barrages at Isna, Asyut, and Nag Hammadi keep the level of the Nile high enough all year for perennial irrigation in the valley of Upper Egypt; the Idfina Barrage on the Rashid prevents infiltration by the sea at low water. Nile water is also used for irrigation in the Faiyum Basin.

The Aswan Dam (completed 1902 and raised twice since then) was the first dam built on the Nile to store part of the autumn flood for later use; it has a storage capacity of 5 billion cu m and is now supplemented by the Aswan High Dam (completed 1971), 5 mi (8 km) upstream, with a storage capacity of 48 billion cu m, sufficient (with existing dams) to hold back the entire flood for later use. Construction of the Aswan High Dam has added c.1,800,000 acres (728,500 hectares) of irrigated land to Egypt's cultivable area and converted c.730,000 acres (295,400 hectares) from basin to perennial irrigation. Lake Nasser, created by the Aswan High Dam, has experienced problems with silting. There has been a reduction of soil replenishment downstream and a reduction of nutrients that once fed the E Mediterranean Sea. Other important storage dams, all outside Egypt, but built with Egypt's help or cooperation, are the Nalubaale Dam (formerly Owen Falls Dam; 1954) and Jabal Awliya Dam (1937) on the White Nile; the Sennar (1927) and Roseires (1966) on the Blue Nile; and the Kashm-el-Girba Dam (1964) on the Atbara River.

The Search for the Nile's Source

The source of the Nile and its life-giving floods was a mystery for centuries. Ptolemy held that the source was the "Mountains of the Moon," and the search for these and for the origin of the Nile attracted much attention in the 18th and 19th cent. James Bruce, the Scottish explorer, identified (1770) Lake Tana as the source of the Blue Nile, and John Speke, the British explorer, is credited with the identification (1861-62) of Lake Victoria and Ripon Falls as the source of the White Nile.

Bibliography

See B. Brander, The River Nile (2d ed. 1968); J. Waterbury, Hydropolitics of the Nile Valley (1979); A. Moorhead, The White Nile (rev. ed. 1983).


The longest river in Africa and, arguably, the world.

The Nile (Bahr al-Nil) dominates the landscape of eastern and northern Africa as well as the lives and livelihood of its people. The Nile traverses 35 degrees of latitude and 4,200 miles in its flow from Burundi in the East African rift valleys through ten riparian countries to Egypt on the Mediterranean. Within this 1.25-million-square-mile drainage area, the Nile Basin encompasses unique wildlife habitats and broad biodiversity. At the same time, Nile Basin countries are home to 300 million people, a number projected to double by 2025.

The Nile Basin is environmentally sensitive. Stretching from the equator to the Mediterranean, the Nile is a principal flyway for migrating birds that nest along its many marshes, lakes, and tributaries. Its wetlands, forests, and open lands are home to a broad array of flora and fauna. Its natural beauty has attracted tourists for centuries. But increasing population and limited water supply have put stress on the people of the basin as well as on the environment. Total water and water availability per capita in the Nile Basin remain low.

Compared to other major river basins, the Nile's disparity in water availability differs sharply among sub-basins. Arid portions (perhaps one-third of the basin) yield negligible flows; in contrast, the highlands of Ethiopia, comprising 10 to 20 percent of the land area of the overall basin, and draining through the Blue Nile and Atbara, yield approximately 120 billion cubic yards, or 60 to 80 percent of the annual flow at Aswan. Flows from the White Nile originating in the region of Lake Victoria are buffered by the great Sudd swamps of southern Sudan, and thus are approximately constant through the year. Flows from the Blue Nile are concentrated in a three-month period of late summer, creating the famous annual inundation of Egypt.

Twelve miles south of Cairo, the Nile divides into the Rosetta and Damietta branches and enters the delta. For Egypt and Sudan, the river is almost the sole source of water, and their inhabitants have always been intensely concerned with the utilization of its waters. The valley of the lower Nile and delta has among the most fertile soils in the world, created by millennia of sediment deposition during the annual inundation. Since the building of the High Dam at Aswan in the 1960s, this felicitous natural process has been much curtailed. As population and industrialization grow along its banks, the quality of Nile waters has become degraded by pollution.

Bibliography

Howell, P. P., and Allan, J. A. The Nile: Resource Evaluation,Resource Management, Hydropolitics, and Legal Issues. London: SOAS/RGS, 1990.

Hurst, H. E. The Nile A General Account of the River and the Utilization of Its Waters. London: Constable, 1952.

Said, R. The River Nile: Geology, Hydrology, and Utilization. Oxford, U.K.; Pergamon, 1993.

Waterbury, John. Hydropolitics of the Nile Valley. Syracuse, NY: Syracuse University Press, 1979.

ARTHUR GOLDSCHMIDT
UPDATED BY GREGORY B. BAECHER

Geography:

Nile River

Top

River originating in central Africa and flowing north to the Mediterranean Sea, with its delta in Egypt. The Nile proper is formed by the joining of the Blue Nile, which flows from Ethiopia, and the White Nile, which flows from Lake Victoria. They meet at Khartoum, Sudan.

  • At over four thousand miles, it is the longest river in the world.
  • The Nile River Valley in Egypt is the site of the first great civilization.

Wikipedia:

Nile

Top
Nile
River
The Nile in Egypt
Name origin: "Nile"(Arabic: 'nīl) comes from the Greek word Neilos (Νεῖλος)
Countries  Ethiopia,  Sudan,  Egypt,  Rwanda,  Tanzania,  Uganda,  Burundi,  Democratic Republic of the Congo,  Eritrea,  Kenya
Cities JinjaUganda, JubaSouthern Sudan, KhartoumSudan, CairoEgypt
Primary source White Nile
 - elevation 2,700 m (8,858 ft)
 - coordinates 2°16′55.92″S 29°19′52.32″E / 2.2822°S 29.3312°E / -2.2822; 29.3312
Secondary source Blue Nile
 - location Lake Tana, Ethiopia
 - coordinates 12°2′8.8″N 37°15′53.11″E / 12.035778°N 37.2647528°E / 12.035778; 37.2647528
Source confluence near Khartoum
Mouth
 - location Mediterranean Sea
 - elevation m (0 ft)
Length 6,650 km (4,132 mi)
Width km (5 mi)
Basin 3,400,000 km2 (1,312,747 sq mi)
Discharge
 - average 2,830 m3/s (99,941 cu ft/s)

The Nile (Arabic: النيل‎, an-nīl, Ancient Egyptian iteru or Ḥ'pī, Coptic piaro or phiaro) is a major north-flowing river in Africa, generally regarded as the longest river in the world.[1]

The Nile has two major tributaries, the White Nile and Blue Nile, the latter being the source of most of the Nile's water and fertile soil, but the former being the longer of the two. The White Nile rises in the Great Lakes region of central Africa, with the most distant source in southern Rwanda 2°16′55.92″S 29°19′52.32″E / 2.2822°S 29.3312°E / -2.2822; 29.3312, and flows north from there through Tanzania, Lake Victoria, Uganda and southern Sudan, while the Blue Nile starts at Lake Tana in Ethiopia 12°2′8.8″N 37°15′53.11″E / 12.035778°N 37.2647528°E / 12.035778; 37.2647528, flowing into Sudan from the southeast. The two rivers meet near the Sudanese capital Khartoum.

The northern section of the river flows almost entirely through desert, from Sudan into Egypt, a country whose civilization has depended on the river since ancient times. Most of the population and cities of Egypt, lie along those parts of the Nile valley north of Aswan; and nearly all the cultural and historical sites of Ancient Egypt are found along the banks of the river. The Nile ends in a large delta that empties into the Mediterranean Sea.

Contents

Etymology of the word Nile

Iteru.png
Nile seen from Spot Satellite

The word "Nile" comes from Greek Neilos (Νεῖλος), of unknown derivation. In the ancient Egyptian language, the Nile is called Ḥ'pī or iteru, meaning "great river", represented by the hieroglyphs shown on the right (literally itrw, and 'waters' determinative).[2] In Coptic, the words piaro (Sahidic) or phiaro (Bohairic) meaning "the river" (lit. p(h).iar-o "the.canal-great") come from the same ancient name.

Tributaries and distributaries

The drainage basin of the Nile covers 3,254,555 square kilometres (1,256,591 sq mi), about 10% of the area of Africa.[3]

There are two great tributaries of the Nile, joining at Khartoum: the White Nile, starting in equatorial East Africa, and the Blue Nile, beginning in Ethiopia. Both branches are on the western flanks of the East African Rift, the southern part of the Great Rift Valley. Below the Blue and White Nile confluence the only remaining major tributary is the Atbara River, which originates in Ethiopia north of Lake Tana, and is around 800 kilometres (500 mi) long. It flows only while there is rain in Ethiopia and dries very fast. It joins the Nile approximately 300 kilometres (200 mi) north of Khartoum.

The Nile is unusual in that its last tributary (the Atbara) joins it roughly halfway to the sea. From that point north, the Nile diminishes because of evaporation.

The course of the Nile in Sudan is distinctive. It flows over six groups of cataracts, from the first at Aswan to the sixth at Sabaloka (just north of Khartoum) and then turns to flow southward for a good portion of its course, before again returning to flow north to the sea. This is called the "Great Bend of the Nile".

East Africa, showing the course of the Nile River, with the "Blue" and "White" Niles marked in those colours

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

White Nile

The Blue Nile Falls fed by Lake Tana near the city of Bahir Dar, Ethiopia forms the upstream of the Blue Nile. It is also known as Tis Issat Falls after the name of the nearby village.

The source of the Nile is sometimes considered to be Lake Victoria, but the lake itself has feeder rivers of considerable size. The most distant stream—and thus the ultimate source of the Nile—emerges from Nyungwe Forest in Rwanda, via the Rukarara, Mwogo, Nyabarongo and Kagera rivers, before flowing into Lake Victoria in Tanzania near the town of Bukoba.

The Nile leaves Lake Victoria at Ripon Falls near Jinja, Uganda, as the Victoria Nile. It flows for approximately 500 kilometres (300 mi) farther, through Lake Kyoga, until it reaches Lake Albert. After leaving Lake Albert, the river is known as the Albert Nile. It then flows into Sudan, where it becomes known as the Bahr al Jabal ("River of the Mountain"). The Bahr al Ghazal, itself 716 kilometres (445 mi) long, joins the Bahr al Jabal at a small lagoon called Lake No, after which the Nile becomes known as the Bahr al Abyad, or the White Nile, from the whitish clay suspended in its waters. When the Nile flooded it left this rich material named silt. The Ancient Egyptians used this soil to farm. From Lake No, the river flows to Khartoum. An anabranch river called Bahr el Zeraf flows out of the Nile's Bahr al Jabal section and rejoins the White Nile.

The term "White Nile" is used in both a general sense, referring to the entire river above Khartoum, and a limited sense, the section between Lake No and Khartoum.

Blue Nile

The Blue Nile (Ge'ez ጥቁር ዓባይ Ṭiqūr ʿĀbbāy (Black Abay) to Ethiopians; Arabic: النيل الأزرق‎; transliterated: an-Nīl al-Āzraq) springs from Lake Tana in the Ethiopian Highlands. The Blue Nile flows about 1,400 kilometres (870 mi) to Khartoum, where the Blue Nile and White Nile join to form the "Nile proper". 90% of the water and 96% of the transported sediment carried by the Nile[4] originates in Ethiopia, with 59% of the water from the Blue Nile alone (the rest being from the Tekezé, Atbarah, 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 Plateau; the rest of the year, the great rivers draining Ethiopia into the Nile (Sobat, Blue Nile, Tekezé, and Atbarah) flow weakly.

Yellow Nile

The Yellow Nile is a former tributary that connected the Ouaddaï Highlands of eastern Chad to the Nile River Valley ca. 8000 to ca. 1000 BCE.[5] 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 and near the southern point of the Great Bend.

Lost headwaters

Formerly Lake Tanganyika drained northwards along the African Rift Valley into the Albert Nile, making the Nile about 900 miles (1,400 km) longer, until blocked in Miocene times by the bulk of the Virunga Volcanoes. See List of rivers by length.

Politics

Composite satellite image of the White Nile (see also the Nile delta)

The usage of the Nile River has been closely associated with the politics of East Africa and the Horn of Africa for many decades. Various countries, including Uganda, Sudan, Ethiopia and Kenya have complained about the Egyptian domination of the Nile water resources. The Nile Basin Initiative was one of the most important programs to promote equal usage and peaceful cooperation between the "Nile Basin States." [6] Yet many fear, the Egyptian domination of the waters still causes massive economic obstacles in the area.

The Nile still supports much of the population living along its banks, with the Egyptians living in otherwise inhospitable regions of the Sahara. The river flooded every summer, depositing fertile silt on the plains. The flow of the river is disturbed at several points by cataracts, which are sections of faster-flowing water with many small islands, shallow water, and rocks, forming an obstacle to navigation by boats. The Sudd wetlands in Sudan also forms a formidable obstacle for navigation and flow of water, to the extent that Sudan had once attempted to dig a canal (the Jonglei Canal) to bypass this stagnant mass of water.[7]

The Nile was, and still is, used to transport goods to different places along its long path; especially since winter winds in this area blow up river, the ships could travel up with no work by using the sail, and down using the flow of the river. While most Egyptians still live in the Nile valley, the construction of the Aswan High Dam (finished in 1970) to provide hydroelectricity ended the summer floods and their renewal of the fertile soil.

Cities on the Nile include Khartoum, Aswan, Luxor (Thebes), and the Giza – Cairo conurbation. The first cataract, the closest to the mouth of the river, is at Aswan to the north of the Aswan Dams. The Nile north of Aswan is a regular tourist route, with cruise ships and traditional wooden sailing boats known as feluccas. In addition, many "floating hotel" cruise boats ply the route between Luxor and Aswan, stopping in at Edfu and Kom Ombo along the way. It used to be possible to sail on these boats all the way from Cairo to Aswan, but security concerns have shut down the northernmost portion for many years.

More recently, drought during the 1980s led to widespread starvation in Ethiopia and Sudan but Egypt was protected from drought by water impounded in Lake Nasser. Beginning in the 1980s techniques of analysis using hydrology transport models have been used in the Nile to analyze water quality.

Hydrology

The Nile makes its way through the Sahara

The flow rate of the Albert Nile at Mongalla is almost constant throughout the year and averages 1,048 m3/s (37,000 cu ft/s). After Mongalla, the Nile is known as the Bahr El Jebel which enters the enormous swamps of the Sudd region of Sudan. More than half of the Nile's water is lost in this swamp to evaporation and transpiration. The average flow rate in the Bahr El Jebel at the tails of the swamps is about 510 m3/s (18,000 cu ft/s). From here it soon meets with the Sobat River and forms the White Nile.

The Bahr al Ghazal and the Sobat River are the two most important tributaries of the White Nile in terms of drainage area and discharge. The Bahr al Ghazal's drainage basin is the largest of any of the Nile's sub-basins, measuring 520,000 square kilometres (200,000 sq mi) in size, but it contributes a relatively small amount of water, about 2 m3/s (71 cu ft/s) 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, 225,000 km2 (86,900 sq mi), but contributes 412 cubic metres per second (14,500 cu ft/s) annually to the Nile.[8] When in flood the Sobat carries a large amount of sediment, adding greatly to the White Nile's color.[9]

The average flow of the White Nile at Malakal, just below the Sobat River, is 924 m3/s (32,600 cu ft/s), the peak flow is approximately 1,218 m3/s (43,000 cu ft/s) in early March and minimum flow is about 609 m3/s (21,500 cu ft/s) in late August. The fluctuation there is due the substantial variation in the flow of the Sobat which has a minimum flow of about 99 m3/s (3,500 cu ft/s) in August and a peak flow of over 680 m3/s (24,000 cu ft/s) in early March.

From here the White Nile flows to Khartoum where it merges with the Blue Nile to form the Nile River. Further downstream the Atbara River, the last significant Nile tributary, merges with the Nile. During the dry season (January to June) the White Nile contributes between 70% and 90% of the total discharge from the Nile. During this period of time the natural discharge of the Blue Nile can be as low as 113 m3/s (4,000 cu ft/s), although upstream dams regulate the flow of the river. During the dry period, there will typically be no flow from the Atbara River.

The Blue Nile contributes approximately 80-90% of the Nile River discharge. 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 wet season the peak flow of the Blue Nile will often exceed 5,663 m3/s (200,000 cu ft/s) in latter August (variation by 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 8,212 m3/s (290,000 cu ft/s) would occur during the later portions of August and early September and minimum flows of about 552 m3/s (19,500 cu ft/s) would occur during later April and early May. 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/evapotranspiration, and groundwater flow.

History

The confluence of the Kagera and Ruvubu rivers near Rusumo Falls, part of the Nile's upper reaches.

The Nile (iteru in Ancient Egyptian) was the lifeline of the ancient Egyptian civilization, with most of the population and all of the cities of Egypt resting along those parts of the Nile valley lying north of Aswan. The Nile has been the lifeline for Egyptian culture since the Stone Age. Climate change, or perhaps overgrazing, desiccated the pastoral lands of Egypt to form the Sahara desert, possibly as long ago as 8000 BC, and the inhabitants then presumably migrated to the river, where they developed a settled agricultural economy and a more centralized society.

The Eonile

The present Nile is at least the fifth river that has flowed north from the Ethiopian Highlands. Satellite imagery was used to identify dry watercourses in the desert to the west of the Nile. An Eonile canyon, now filled by surface drift, represents an ancestral Nile called the Eonile that flowed during the later Miocene (23–5.3 million years before the present). The Eonile transported clastic sediments to the Mediterranean, where several 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 empty or nearly so, the Nile cut its course down to the new base level until it was several hundred feet below world ocean level at Aswan and 8,000 feet (2,400 m) below Cairo. This huge canyon is now full of later sediment.

Lake Tanganyika drained northwards into the Nile until the Virunga Volcanoes blocked its course in Rwanda. That would have made the Nile much longer, with its longest headwaters in northern Zambia.

The integrated Nile

There are two theories in relation to the age of the integrated Nile. The first one is that the integrated drainage of the Nile is of young age, that the Nile basin was formerly broken into series of separate basins, only the most northerly (the Proto Nile basin) feeding a river following the present course of the Nile in Egypt and in the far north of the Sudan.[10] Said (1981) stresses the idea that Egypt itself supplied most of the waters of the Nile during the early part of its history. The other theory is that the drainage from Ethiopia via rivers equivalent to the Blue Nile and the Atbara/Takazze flowed to the Mediterranean via the Egyptian Nile since well back into Tertiary times.[11]

Salama (1987) suggested that during the Tertiary there were a series of separate closed continental basins, each basin occupying one of the major Sudanese Rift System: Mellut Rift, White Nile Rift, Blue Nile Rift, Atbara Rift and Sag El Naam Rift.[12] The Mellut Rift Basin is nearly 12 km deep at its central part. This rift is possibly still active, with reported tectonic activity in its northern and southern boundaries. The Sudd swamps which forms the central part of the Basin is possibly still subsiding. The White Nile Rift System, although shallower than Bahr El Arab, is about 9 km deep. Geophysical exploration of the Blue Nile Rift System estimated the depth of the sediments to be 5–9 km. These basins were not interconnected except after their subsidence ceased and the rate of sediment deposition was enough to fill up the basins to such a level that would allow connection to take place. The filling up of the depressions led to the connection of the Egyptian Nile with the Sudanese Nile, which captures the Ethiopian and Equatorial head waters during the latest stages of tectonic activities of Eastern, Central and Sudanese Rift Systems.[13] The connection of the different Niles occurred during the cyclic wet periods. The River Atbara overflowed its closed basin during the wet periods which occurred about 100,000 to 120,000 years B.P. The Blue Nile was 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 some 12,500 years B.P.

Role in the founding of Egyptian civilization

Reconstruction of the Oikoumene (inhabited world) ancient map based on Herodotus' description of the world, circa 450 BCE.

The Nile, an unending source of sustenance, provided a crucial role in the development of Egyptian civilization. The Nile made the land surrounding it extremely fertile when it flooded or was inundated annually. The Egyptians were able to cultivate wheat and crops around the Nile, providing food for the general population. Also, the Nile’s water attracted game such as water buffalo; and after the Persians introduced them in the 7th century BC, camels. These animals could be killed for meat, or could be captured, tamed and used for ploughing — or in the camels' case, travelling. Water was vital to both people and livestock. The Nile was also a convenient and efficient way of transportation for people and goods.

Dhows on the Nile

The structure of Egypt’s society made it one of the most stable in history. In fact, it might easily have surpassed many modern societies. This stability was an immediate result of the Nile’s fertility. The Nile also provided flax for trade. Wheat was also traded, a crucial crop in the Middle East where famine was very common. This trading system secured the diplomatic relationship Egypt had with other countries, and often contributed to Egypt's economic stability. Also, the Nile provided the resources such as food or money, to quickly and efficiently raise an army for offensive or defensive roles.

The Nile played a major role in politics and social life. The pharaoh would supposedly flood the Nile, and in return for the life-giving water and crops, the peasants would cultivate the fertile soil and send a portion of the resources they had reaped to the Pharaoh. He or she would in turn use it for the well-being of Egyptian society.

The Nile was a source of spiritual dimension. The Nile was so significant to the lifestyle of the Egyptians, that they created a god dedicated to the welfare of the Nile’s annual inundation. The god’s name was Hapy, and both he and the pharaoh were thought to control the flooding of the Nile. Also, the Nile was considered as a causeway from life to death and 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 time he crossed the sky. Thus, all tombs were located west of the Nile, because the Egyptians believed that in order to enter the afterlife, they must be buried on the side that symbolized death.

The Greek historian, Herodotus, wrote that ‘Egypt was the gift of the Nile’, and in a sense that is correct. Without the waters of the Nile River for irrigation, Egyptian civilization would probably have been short-lived. The Nile provided the elements that make a vigorous civilization, and contributed much to its lasting three thousand years.

That far-reaching trade has been carried on along the Nile since ancient times can be seen from the Ishango bone, possibly the earliest known indication of Ancient Egyptian multiplication, which was discovered along the headwaters of the Nile River (near Lake Edward, in northeastern Congo) and was carbon-dated to 20,000 BC.

The search for the source of the Nile

The Great Bend of the Nile in Sudan, looking north across the Sahara Desert towards Northern Sudan.

Despite the attempts of the Greeks and Romans (who were unable to penetrate the Sudd), the upper reaches of the Nile remained largely unknown. Various expeditions had failed to determine the river's source, thus yielding classical Hellenistic and Roman representations of the river as a male god with his face and head obscured in drapery. 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, but no European in antiquity is known to have reached Lake Tana.

Historic map of the River Nile by Piri Reis

Europeans learned little new information about the origins of the Nile until the 15th and 16th centuries, when travelers to Ethiopia visited not only Lake Tana, but the source of the Blue Nile in the mountains south of the lake. Although James Bruce claimed to have been the first European to have visited the headwaters (Travels to Discover the Source of the Nile, 1790), modern writers with better knowledge give the credit to the Jesuit Pedro Páez. Páez’ account of the source of the Nile (History of Ethiopia c. 1622) was not published in full until the early 20th century. The work is a long and vivid account of Ethiopia. The account is however featured in several contemporary works, including Balthazar Telles (Historia geral da Ethiopia a Alta, 1660), Athanasius Kircher (Mundus Subterraneus, 1664) and by Johann Michael Vansleb (The Present State of Egypt, 1678). Europeans had been resident in the country since the late 15th century, and it is entirely possible one of them had visited the headwaters even earlier but was unable to send a report of his discoveries out of Ethiopia. Jerónimo Lobo also describes the source of the Blue Nile, visiting shortly after Pedro Páez. His account is likewise utilized by Balthazar Telles.

The White Nile was even less understood, and 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." [14] A merchant named Diogenes reported the Nile’s water attracted game such as water buffalo; and after the Persians introduced them in the 7th century BC, camels.

Lake Victoria was first sighted by Europeans in 1858 when the British explorer John Hanning Speke reached its southern shore whilst on his journey 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 of the United Kingdom. Burton, who had been recovering from illness at the time and resting further south on the shores of Lake Tanganyika, was outraged that Speke claimed to have proved his discovery to have been the true source of the Nile when Burton regarded this as still unsettled. A very public quarrel ensued, which not only sparked a great deal of intense debate within the scientific community of the day, but much interest by other explorers keen to either confirm or refute Speke's discovery. The well known British explorer and missionary David Livingstone failed in his attempt to verify Speke's discovery, instead pushing too far west and entering the Congo River system instead. It was ultimately the Welsh-American explorer Henry Morton Stanley who confirmed the truth of Speke's discovery, circumnavigating Lake Victoria and reporting the great outflow at 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 British takeover of Egypt in the1870s, more British river steamers were sure to follow. The Nile is the natural navigation channel in the area. Access to Khartoum and Sudan was via steamer. The Siege of Khartoum was ameliorated with steamers. Purpose built sternwheelers were shipped from England and steamed up the river to re-take the city. After this regular steam navigation came. With British Forces in Egypt in the First World War and the inter war years, river steamers provided both security and sight seeing to the pyramids and Luxor. Agatha Christie stories indicate the penetration of Nile steamer into the public consciousness. Steam navigation remained integral to the two countries as late as 1962—Sudan steamer traffic was the lifeline as few railways or roads were built. Most paddle steamers have been retired to shorefront service, but modern diesel tourist boats remain on the river.

Modern achievements

The Nile passes through Cairo, Egypt's capital city

The White Nile Expedition, led by South African national Hendri Coetzee, became the first to navigate the Nile's entire length. The expedition took off from the source of the Nile in Uganda on 17 January 2004 and arrived safely at the Mediterranean in Rosetta, 4 months and 2 weeks later. National Geographic released a feature film about the expedition towards in late 2005 entitled The Longest River.

On 28 April 2004, geologist Pasquale Scaturro and his partner, kayaker and documentary filmmaker Gordon Brown became the first people to navigate the Blue Nile, from Lake Tana in Ethiopia to the beaches of Alexandria on the Mediterranean. Though their expedition included a number of others, Brown and Scaturro were the only ones to remain on the expedition for the entire journey. They chronicled their adventure with an IMAX camera and two handheld video cams, sharing their story in the IMAX film Mystery of the Nile, and in a book of the same title. The team was forced to use outboard motors for most of their journey, and it was not until 29 January 2005 when Canadian Les Jickling and New Zealander Mark Tanner reached the Mediterranean Sea, that the river had been paddled for the first time under human power.

A team led by South Africans Peter Meredith and Hendri Coetzee on 30 April 2005, became the first to navigate the most remote headstream, the remote source of the Nile, the Akagera river, which starts as the Rukarara in Nyungwe forest in Rwanda.

On 31 March 2006, three explorers from Britain and New Zealand lead by Neil McGrigor claimed to have been the first to travel the river from its mouth to a new "true source" deep in Rwanda's Nyungwe rainforest.[15]2°16′55.92″S 29°19′52.32″E / 2.2822°S 29.3312°E / -2.2822; 29.3312.[16]

Crossings I

This is a list of crossings from Khartoum to the Mediterranean Sea:

  • Aswan Bridge, Aswan
  • Luxor Bridge, Luxor
  • Suhag Bridge, Suhag
  • Assiut Bridge, Assiut
  • Al Minya Bridge, Minya
  • Al Marazeek Bridge, Helwan
  • 1st Ring Road Bridge (Moneeb Crossing), Cairo
  • Abbas Bridge, Cairo
  • University Bridge, Cairo
  • Qasr El Nile Bridge, Cairo
  • 6th of October Bridge, Cairo
  • Abu El Ela Bridge, Cairo (removed)
  • New Abu El Ela Bridge, Cairo
  • Imbaba Bridge, Cairo
  • Rod Elfarag Bridge, Cairo
  • 2nd Ring Road Bridge, Cairo

Crossings II

This is a list of crossings from Rwanda to Khartoum:

Images of the Nile

Media

See also

References

  1. ^ River Encarta (Accessed 3 October 2006). Archived 2009-11-01.
  2. ^ What did the ancient Egyptians call the Nile river? Open Egyptology. (Accessed 17 October 2006 - Login required or enter as Guest)
  3. ^ EarthTrends: The Environmental Information Portal
  4. ^ Marshall et al., Late Pleistocene and Holocene environmental and climatic change from Lake Tana, source of the Blue NilePDF (247 KiB), 2006
  5. ^ Keding, B (2000). "New data on the Holocene occupation of the Wadi Howar region (Eastern Sahara/Sudan)." Studies in African Archaeology 7, 89–104.
  6. ^ The Nile Basin Initiative
  7. ^ Shahin, Mamdouh (2002). Hydrology and Water Resources of Africa. Springer. pp. 286–287. ISBN 140200866X. ; online at Google Books
  8. ^ Shahin, Mamdouh (2002). Hydrology and Water Resources of Africa. Springer. pp. 276, 287–288. ISBN 140200866X. ; online at Google Books
  9. ^ "Sobat River". Encyclopædia Britannica Online Library Edition. Encyclopædia Britannica. http://www.library.eb.com/eb/article-9068426. Retrieved 2008-01-21. 
  10. ^ Said, R. (1981). The geological evolution of the River Nile. Springer Verlag.
  11. ^ Williams, M.A.J. and 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.
  12. ^ Salama, R.B. (1987). "The evolution of the River Nile, The buried saline rift lakes in Sudan". J. African Earth Sciences 6 (6): 899–913. doi:10.1016/0899-5362(87)90049-2. 
  13. ^ 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) p. 105–149. ElSevier, Amsterdam.
  14. ^ Natural History, 5.10
  15. ^ [1] News item on Expeditions official website (via Archive.org cache )[dead link]
  16. ^ [2][dead link]

Annotated bibliography

An annotated bibliography of the key written documents for the Western exploration of the Nile.

1600s

  • Historia da Ethiopia, Pedro Páez (aka Pero Pais), Portugal, 1620
A Jesuit missionary who was sent from Goa to 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 Tigre, for 9 years and travelled to Lake Tana and the Blue Nile, reaching the province of 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)

1700s

  • 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 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 of 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

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 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 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 Travellers 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. 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., Rev Dr. J. Krapf, Trubner and Co, London; 1860; Tickner & Fields, Boston; 1860
Krapf went to East Africa in the service of the English Church Missionary Society, arriving at Mombasa, 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 and became an ivory trader. He traveled extensively in the Bahr-el-Ghazal region, then almost unknown, exploring the Jur, Yalo and other affluents of the Ghazal and in 1858 he penetrated the 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. 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, on 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 also met up with Sir Samuel Baker and provided him with essential information which helped Baker in his discovery of the Albert Nyanza. 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 500 miles (800 km) of a portion of Eastern Africa previously totally unknown

External links



Translations:

Nile

Top
Nile

Dansk (Danish)
adj. - nil-

idioms:

  • nile blue    nilblå
  • nile green    nilgrøn
  • nile perch    nilaborre

n. - Nilen

Français (French)
adj. - Nil

idioms:

  • nile blue    bleu nil
  • nile green    vert nil
  • nile perch    perche du Nil

n. - Nil

Deutsch (German)
adj. - Nil-

idioms:

  • nile blue    Nilblau
  • nile green    Nilgrün
  • nile perch    Nilbarsch

n. - Nil

Ελληνική (Greek)
adj. - μπλε του Νείλου

idioms:

  • nile blue    μπλε του Νείλου
  • nile green    πράσινο του Νείλου
  • nile perch    πέρκα του Νείλου

Italiano (Italian)
grigio-azzurro

idioms:

  • nile green/blue    grigio-azzurro
  • nile perch    persico del Nilo

Português (Portuguese)
adj. - do rio Nilo

idioms:

  • nile green/blue    verde-azul claro
  • nile perch    grande peixe fluvial encontrado na África

n. - Rio Nilo

Русский (Russian)
Нил

idioms:

  • nile green/blue    желтовато-зеленый
  • nile perch    нильский окунь

Español (Spanish)
adj. - del Nilo

idioms:

  • nile blue    verde/azul Nilo
  • nile green    verde/azul Nilo
  • nile perch    perca del Nilo

n. - Nilo

Svenska (Swedish)
adj. - nil-

中文(简体)(Chinese (Simplified))
尼罗河

尼罗河的

idioms:

  • nile blue    尼罗蓝色, 稍带绿色的浅蓝色
  • nile green    尼罗绿, 稍带蓝色的浅绿色
  • nile perch    尖吻鲸

中文(繁體)(Chinese (Traditional))
n. - 尼羅河

adj. - 尼羅河的

idioms:

  • nile blue    尼羅藍色, 稍帶綠色的淺藍色
  • nile green    尼羅綠, 稍帶藍色的淺綠色
  • nile perch    尖吻鯨

한국어 (Korean)
adj. - 나일강의

나일강 (아프리카 동부에서 발원, 지중해로 흘러드는 세계 최장의 강)

日本語 (Japanese)
n. - ナイル, ナイル川

idioms:

  • nile green/blue    青みがかった薄緑色
  • nile perch    ナイルアカメ

עברית (Hebrew)
adj. - ‮נהר הנילוס, נילוס‬
n. - ‮נילוס‬


 
 

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