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| + | {{Infobox_river | ||
| + | | river_name = '''Blue Nile''' | ||
| + | | image_name = Blue nile map.png | ||
| + | | caption = Map of the Blue Nile | ||
| + | | origin = Springs of Sakala above [[Lake Tana]], [[Ethiopia]], [[Africa]] | ||
| + | | mouth = [[Mediterranean Sea]] | ||
| + | | basin_countries = | ||
| + | | length = 6,695 kilometers (4,180 miles) | ||
| + | | elevation = 1,800 meters (5,905 feet) at source | ||
| + | | average annual flow = 50 cubic kilometers (km3) | ||
| + | | watershed = | ||
| + | }} | ||
| − | The '''Blue Nile''' is a [[river]] originating | + | The '''Blue Nile''' is a [[river]] originating in [[Spring (hydrosphere)|natural springs]] above [[Lake Tana]] in [[Ethiopia]]. The river has played a significant role in human [[history]] by supplying the majority of the [[water]] for the [[Nile River]], providing the means for the land through which it flowed to be agriculturally productive. Having the Nile's floodwaters to depend on gave rise to stable early [[human being|human]] settlements and the [[ancient Egypt]]ian civilization. |
| − | + | Today, [[dam]]s along the Blue Nile in [[Sudan]] produce 80 percent of that country's [[electricity|electric]] power. The Sudanese dams also help irrigate the [[Gezira Plain]], which produces [[cotton]], [[wheat]], and other crops. The Blue Nile is also tapped to supply significant amounts of electric power not only for [[Ethiopia]], the primary nation through which it flows, but also neighboring [[Kenya]], [[Djibouti]], and Sudan. | |
| − | + | Along its upper reaches in Ethiopia the river is called the Abbai. This stretch of the river is considered [[holy]] by many Ethiopians and is believed to be the [[Gihon River]] mentioned as flowing out of the [[Garden of Eden]] in the [[Book of Genesis]]. <ref>Ullendorff, (1968), 2. </ref> | |
| + | {{toc}} | ||
| + | The Abbai portion of the Blue Nile rises at Lake Tana and flows for 19 miles (30 km) before plunging over the [[Tis Issat Falls]]. The river then loops across northwest Ethiopia through a series of deep [[valley]]s and [[canyon]]s into Sudan. There it is known only as the Blue Nile. | ||
| − | Although there are several feeder | + | ==Geography== |
| + | The annual flood in [[Egypt]] is a gift of the annual [[monsoon]] in Ethiopia. In the winter, when little [[rain]] falls in the highlands, the Blue Nile/Atbara rivers dry up. In the summer, moist winds from the [[Indian Ocean]] cool as they climb up the Ethiopian highlands, bringing torrential rains that fill the dry washes and canyons with rushing [[water]] that ultimately joins the Blue Nile or the Atbara. | ||
| + | |||
| + | Although there are several feeder [[stream]]s that flow into Lake Tana, the [[sacred]] source of the river is generally considered to be a small spring at [[Gish Abbai]] at an altitude of approximately 5,905 feet (1,800 m). The Blue Nile much later joins the [[White Nile]] at [[Khartoum]], [[Sudan]], and, as the [[Nile River|Nile]], flows through [[Egypt]] to the [[Mediterranean Sea]] at [[Alexandria]]. The Blue Nile is so-called because during flood times the water current is so high that it changes color to almost black; in the local Sudanese [[language]] the word for black is also used for blue. | ||
The distance from its source to its confluence is variously reported as 907 and 1,000 miles (1,460 and 1,600 km). The uncertainty over its length partially results from the fact that it flows through virtually impenetrable gorges cut in the Ethiopian highlands to a depth of some 4,950 feet (1,500 m)—a depth comparable to that of the [[Grand Canyon]] in the [[United States]]. | The distance from its source to its confluence is variously reported as 907 and 1,000 miles (1,460 and 1,600 km). The uncertainty over its length partially results from the fact that it flows through virtually impenetrable gorges cut in the Ethiopian highlands to a depth of some 4,950 feet (1,500 m)—a depth comparable to that of the [[Grand Canyon]] in the [[United States]]. | ||
| − | [[Image:Blue Nile | + | [[Image:Blue Nile near Bahar Dar.jpg|thumb|Blue Nile near Bahar Dar]] |
| − | + | The Blue Nile flows generally south from Lake Tana and then west across Ethiopia and northwest into Sudan. Within 18.6 miles (30 km) of its source at Lake Tana, the river enters a canyon about 400 kilometers (250 miles) long. This gorge is a tremendous obstacle for travel and communication between the northern and southern halves of Ethiopia. The power of the Blue Nile may best be appreciated at [[Tis Issat Falls]], which are 148 feet (45 m) high. Despite the hazards and obstacles of the river, on January 29, 2005, Canadian Les Jickling and New Zealander Mark Tanner reached the Mediterranean Sea after an epic 148 day journey, becoming the first to have paddled the Blue Nile from source to sea. | |
| − | The Blue Nile flows generally south from Lake Tana and then west across Ethiopia and northwest into Sudan. Within 18.6 miles (30 km) of its source at Lake Tana, the river enters a canyon about 400 kilometers long. This gorge is a tremendous obstacle for travel and communication between the northern and southern halves of Ethiopia. The power of the Blue Nile may best be appreciated at Tis Issat Falls, which are 148 feet (45 m) high. Despite the hazards and obstacles of the river, on January 29, 2005, Canadian Les Jickling and New Zealander Mark Tanner reached the Mediterranean Sea after an epic 148 | ||
| − | The flow of the Blue Nile reaches maximum volume in the rainy season (from June to September), when it supplies about two-thirds of the water of the Nile proper. The Blue Nile, along with the Atbara River to the north, which also flows out of the Ethiopian highlands, were responsible for the annual Nile floods that contributed to the fertility of the Nile Valley and the consequent rise of [[ancient | + | The flow of the Blue Nile reaches maximum volume in the rainy season (from June to September), when it supplies about two-thirds of the water of the Nile proper. The Blue Nile, along with the Atbara River to the north, which also flows out of the Ethiopian highlands, were responsible for the annual Nile floods that contributed to the fertility of the [[Nile Valley]] and the consequent rise of [[ancient Egypt]]ian [[civilization]] and [[Egyptian mythology]]. With the completion, in 1970, of the [[Aswan High Dam]] in Egypt, the Nile floods ended. |
| − | Despite being the source of most of the Nile's water, Ethiopia has had limited rights to it. Egypt and Sudan, through the Agreement of 1959, split use of these resources. In 1999, the Nile Basin Initiative was created to foster cooperation between all ten countries in the Nile basin. | + | Despite being the source of most of the Nile's water, Ethiopia has had limited rights to it. Egypt and Sudan, through the Agreement of 1959, split use of these resources. In 1999, the [[Nile Basin Initiative]] was created to foster cooperation between all ten countries in the [[Nile]] basin. |
==Economy== | ==Economy== | ||
| − | The Blue Nile is vital to the livelihood of [[Egypt]]. Though shorter than the White Nile, 56 percent of the [[water]] that reaches Egypt originates from the Blue Nile branch of the great river; when combined with the Atbara River, which also has its source in the | + | The Blue Nile is vital to the livelihood of [[Egypt]]. Though shorter than the [[White Nile]], 56 percent of the [[water]] that reaches Egypt originates from the Blue Nile branch of the great [[river]]; when combined with the [[Atbara River]], which also has its source in the [[Ethiopia]]n highlands, the figure rises to 90 percent of the water and 96 percent of transported [[sediment]]. |
| − | The river is also an important resource for [[Sudan]], where the Roseires and Sennar | + | The river is also an important resource for [[Sudan]], where the Roseires and Sennar [[dam]]s produce 80 percent of the country's power. These dams also help irrigate the [[Gezira Plain]], which is most famous for its high quality [[cotton]]. The region also produces [[wheat]] and animal feed crops. |
| − | The Tis Issat or Blue Nile Falls consist of four streams that originally varied from a trickle in the dry season to over 400 meters wide in the rainy season. Regulation of Lake Tana now reduces the variation somewhat, and since 2003 a hydro-electric station has taken much of the flow out of the falls except during the rainy season.<ref> | + | The Tis Issat or Blue Nile Falls consist of four streams that originally varied from a trickle in the dry season to over 400 meters (1313 feet) wide in the rainy season. Regulation of [[Lake Tana]] now reduces the variation somewhat, and since 2003, a [[hydroelectricity|hydro-electric]] station has taken much of the flow out of the falls except during the rainy season.<ref>Philips and Carillet, (2006), 118.</ref> The Falls were once considered one of [[Ethiopia]]'s best-known tourist attractions, but in recent years almost no water comes over the falls due to the new hydropower plant. |
| − | Ethiopia has one of the lowest levels of energy consumption per capita in the world; only about | + | Ethiopia has one of the lowest levels of energy consumption per capita in the world; only about 22 percent of the population has access to [[electricity]]. Electric supply is under the Ethiopian Electric Power Corporation (EEPCo). The state-owned company currently provides electricity to over one million customers in 1,752 towns and communities in Ethiopia, which is only a small proportion of the country's over 70 million inhabitants.<ref>''Ethiopian Electric Power Corporation,'' [http://www.eepco.gov.et/ Power Systems Interconnection.] Retrieved September 11, 2008. </ref> |
| − | Ethiopia | + | Ethiopia is building five hydropower dams to be completed by 2011, with the aim of increasing capacity to 9,000 megawatts by 2018, with surplus power exported to neighboring [[Kenya]], [[Djibouti]], and [[Sudan]]. |
| − | Ethiopia | + | == Exploration == |
| + | It is generally believed that the first [[Europe]]an to have seen the Blue Nile in [[Ethiopia]] was [[Pedro Paez]], a [[Spain|Spanish]] [[Jesuit]] who traveled to the area in the early 1600s; however, [[John Bermudez]] provided the first description of the Tis Issat Falls in his memoirs (published in 1565), and a number of Europeans who lived in Ethiopia in the late fifteenth century could have seen the river before Paez. | ||
| − | + | Numerous European explorers have contemplated tracing the course of the Blue Nile from its confluence with the [[White Nile]] to [[Lake Tana]], but its treacherous gorge, which begins a few miles inside the Ethiopian border, has discouraged all attempts since [[Frédéric Cailliaud]]'s attempt in 1821. The first serious attempt by a non-local to explore this reach of the [[river]] was undertaken by the [[United States|American]] [[W.W. Macmillan]] in 1902, assisted by the [[Norway|Norwegian]] explorer [[B.H. Jenssen]]. Jenssen planned to proceed upriver from [[Khartoum]] while Macmillan sailed downstream from Lake Tana. However, Jenssen's boats were blocked by the rapids at Famaka short of the Sudan-Ethiopian border, and Macmillan's boats were wrecked shortly after they had been launched. Macmillan encouraged Jenssen to try to sail upstream from Khartoum again in 1905, but he was forced to stop 300 miles short of Lake Tana. | |
| − | The | + | The [[Great Britain|British]] consul R.E. Cheesman managed to [[Cartography|map]] the upper course of the Blue Nile between 1925 and 1933, but instead of following the course of the river and its impassible canyon, he mapped it from the highlands above, traveling some 5,000 miles by mule.<ref>Moorehead (1972), 319f.</ref> |
| − | + | On April 28, 2004, [[geology|geologist]] Pasquale Scaturro and his partner, [[kayak]]er and documentary filmmaker Gordon Brown, became the first people to navigate the Blue Nile. 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.<ref>Bangs and Scaturro (2005).</ref> Nevertheless, the team was forced to use [[outboard motor]]s for most of their journey, and it was not until January 29, 2005, when [[Canada|Canadian]] Les Jickling and [[New Zealand]]er Mark Tanner reached the [[Mediterranean Sea]], that the river had been paddled for the first time under human power. | |
| − | + | ==Tissisat Falls in image== | |
| − | + | The Blue Nile Falls (or Tis Issat or Tissisat Falls) fed by [[Lake Tana]] near the city of [[Bahar Dar]], [[Ethiopia]], form the upstream of the Blue Nile. | |
| − | |||
| − | + | {| | |
| + | |+ | ||
| + | |- | ||
| + | | valign="top"| | ||
| + | [[Image:Blue Nile Falls Ethiopia.jpg|thumb|225px]] | ||
| + | |- | ||
| + | |} | ||
| − | + | ==Notes== | |
| − | + | <references/> | |
| − | The | + | ==References== |
| + | * Bangs, Richard, and Pasquale Scaturro. ''Mystery of the Nile: The Epic Story of the First Descent of the World's Deadliest River''. New York City: G.P. Putnam's Sons, 2005. ISBN 978-0399152627 | ||
| + | * Chadwick, Alex. [http://www.npr.org/templates/story/story.php?storyId=1854297 Rafting Down the Blue Nile: Explorers Document First-Ever Journey Down Entire River.] ''[[NPR]]''. Retrieved September 17, 2019. | ||
| + | * ''Ethiopian Electric Power Corporation''. [http://www.eepco.gov.et/ Power Systems Interconnection.] Retrieved September 17, 2019. | ||
| + | * Moorehead, Alan. ''The Blue Nile''. New York: Harper & Row, 1972. | ||
| + | * Penn, James R. ''Rivers of the World: A Social, Geographical, and Environmental Sourcebook''. Santa Barbara, Calif: ABC-CLIO, 2001. ISBN 978-1576070420 | ||
| + | * Phillips, Matt, and Jean-Bernard Carillet. ''Ethiopia and Eritrea''. Footscray, Vic: Lonely Planet, 2006. ISBN 978-1741044362 | ||
| + | * Ullendorff, Edward. ''Ethiopia and the Bible''. London: Oxford U.P, 1968. ISBN 978-0197260760 | ||
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Latest revision as of 18:33, 9 March 2023
| Blue Nile | |
|---|---|
 | |
| Origin | Springs of Sakala above Lake Tana, Ethiopia, Africa |
| Mouth | Mediterranean Sea |
| Length | 6,695 kilometers (4,180 miles) |
| Source elevation | 1,800 meters (5,905 feet) at source |
The Blue Nile is a river originating in natural springs above Lake Tana in Ethiopia. The river has played a significant role in human history by supplying the majority of the water for the Nile River, providing the means for the land through which it flowed to be agriculturally productive. Having the Nile's floodwaters to depend on gave rise to stable early human settlements and the ancient Egyptian civilization.
Today, dams along the Blue Nile in Sudan produce 80 percent of that country's electric power. The Sudanese dams also help irrigate the Gezira Plain, which produces cotton, wheat, and other crops. The Blue Nile is also tapped to supply significant amounts of electric power not only for Ethiopia, the primary nation through which it flows, but also neighboring Kenya, Djibouti, and Sudan.
Along its upper reaches in Ethiopia the river is called the Abbai. This stretch of the river is considered holy by many Ethiopians and is believed to be the Gihon River mentioned as flowing out of the Garden of Eden in the Book of Genesis. [1]
The Abbai portion of the Blue Nile rises at Lake Tana and flows for 19 miles (30 km) before plunging over the Tis Issat Falls. The river then loops across northwest Ethiopia through a series of deep valleys and canyons into Sudan. There it is known only as the Blue Nile.
Geography
The annual flood in Egypt is a gift of the annual monsoon in Ethiopia. In the winter, when little rain falls in the highlands, the Blue Nile/Atbara rivers dry up. In the summer, moist winds from the Indian Ocean cool as they climb up the Ethiopian highlands, bringing torrential rains that fill the dry washes and canyons with rushing water that ultimately joins the Blue Nile or the Atbara.
Although there are several feeder streams that flow into Lake Tana, the sacred source of the river is generally considered to be a small spring at Gish Abbai at an altitude of approximately 5,905 feet (1,800 m). The Blue Nile much later joins the White Nile at Khartoum, Sudan, and, as the Nile, flows through Egypt to the Mediterranean Sea at Alexandria. The Blue Nile is so-called because during flood times the water current is so high that it changes color to almost black; in the local Sudanese language the word for black is also used for blue.
The distance from its source to its confluence is variously reported as 907 and 1,000 miles (1,460 and 1,600 km). The uncertainty over its length partially results from the fact that it flows through virtually impenetrable gorges cut in the Ethiopian highlands to a depth of some 4,950 feet (1,500 m)—a depth comparable to that of the Grand Canyon in the United States.
The Blue Nile flows generally south from Lake Tana and then west across Ethiopia and northwest into Sudan. Within 18.6 miles (30 km) of its source at Lake Tana, the river enters a canyon about 400 kilometers (250 miles) long. This gorge is a tremendous obstacle for travel and communication between the northern and southern halves of Ethiopia. The power of the Blue Nile may best be appreciated at Tis Issat Falls, which are 148 feet (45 m) high. Despite the hazards and obstacles of the river, on January 29, 2005, Canadian Les Jickling and New Zealander Mark Tanner reached the Mediterranean Sea after an epic 148 day journey, becoming the first to have paddled the Blue Nile from source to sea.
The flow of the Blue Nile reaches maximum volume in the rainy season (from June to September), when it supplies about two-thirds of the water of the Nile proper. The Blue Nile, along with the Atbara River to the north, which also flows out of the Ethiopian highlands, were responsible for the annual Nile floods that contributed to the fertility of the Nile Valley and the consequent rise of ancient Egyptian civilization and Egyptian mythology. With the completion, in 1970, of the Aswan High Dam in Egypt, the Nile floods ended.
Despite being the source of most of the Nile's water, Ethiopia has had limited rights to it. Egypt and Sudan, through the Agreement of 1959, split use of these resources. In 1999, the Nile Basin Initiative was created to foster cooperation between all ten countries in the Nile basin.
Economy
The Blue Nile is vital to the livelihood of Egypt. Though shorter than the White Nile, 56 percent of the water that reaches Egypt originates from the Blue Nile branch of the great river; when combined with the Atbara River, which also has its source in the Ethiopian highlands, the figure rises to 90 percent of the water and 96 percent of transported sediment.
The river is also an important resource for Sudan, where the Roseires and Sennar dams produce 80 percent of the country's power. These dams also help irrigate the Gezira Plain, which is most famous for its high quality cotton. The region also produces wheat and animal feed crops.
The Tis Issat or Blue Nile Falls consist of four streams that originally varied from a trickle in the dry season to over 400 meters (1313 feet) wide in the rainy season. Regulation of Lake Tana now reduces the variation somewhat, and since 2003, a hydro-electric station has taken much of the flow out of the falls except during the rainy season.[2] The Falls were once considered one of Ethiopia's best-known tourist attractions, but in recent years almost no water comes over the falls due to the new hydropower plant.
Ethiopia has one of the lowest levels of energy consumption per capita in the world; only about 22 percent of the population has access to electricity. Electric supply is under the Ethiopian Electric Power Corporation (EEPCo). The state-owned company currently provides electricity to over one million customers in 1,752 towns and communities in Ethiopia, which is only a small proportion of the country's over 70 million inhabitants.[3]
Ethiopia is building five hydropower dams to be completed by 2011, with the aim of increasing capacity to 9,000 megawatts by 2018, with surplus power exported to neighboring Kenya, Djibouti, and Sudan.
Exploration
It is generally believed that the first European to have seen the Blue Nile in Ethiopia was Pedro Paez, a Spanish Jesuit who traveled to the area in the early 1600s; however, John Bermudez provided the first description of the Tis Issat Falls in his memoirs (published in 1565), and a number of Europeans who lived in Ethiopia in the late fifteenth century could have seen the river before Paez.
Numerous European explorers have contemplated tracing the course of the Blue Nile from its confluence with the White Nile to Lake Tana, but its treacherous gorge, which begins a few miles inside the Ethiopian border, has discouraged all attempts since Frédéric Cailliaud's attempt in 1821. The first serious attempt by a non-local to explore this reach of the river was undertaken by the American W.W. Macmillan in 1902, assisted by the Norwegian explorer B.H. Jenssen. Jenssen planned to proceed upriver from Khartoum while Macmillan sailed downstream from Lake Tana. However, Jenssen's boats were blocked by the rapids at Famaka short of the Sudan-Ethiopian border, and Macmillan's boats were wrecked shortly after they had been launched. Macmillan encouraged Jenssen to try to sail upstream from Khartoum again in 1905, but he was forced to stop 300 miles short of Lake Tana.
The British consul R.E. Cheesman managed to map the upper course of the Blue Nile between 1925 and 1933, but instead of following the course of the river and its impassible canyon, he mapped it from the highlands above, traveling some 5,000 miles by mule.[4]
On April 28, 2004, geologist Pasquale Scaturro and his partner, kayaker and documentary filmmaker Gordon Brown, became the first people to navigate the Blue Nile. 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.[5] Nevertheless, the team was forced to use outboard motors for most of their journey, and it was not until January 29, 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.
Tissisat Falls in image
The Blue Nile Falls (or Tis Issat or Tissisat Falls) fed by Lake Tana near the city of Bahar Dar, Ethiopia, form the upstream of the Blue Nile.
Notes
ReferencesISBN links support NWE through referral fees
- Bangs, Richard, and Pasquale Scaturro. Mystery of the Nile: The Epic Story of the First Descent of the World's Deadliest River. New York City: G.P. Putnam's Sons, 2005. ISBN 978-0399152627
- Chadwick, Alex. Rafting Down the Blue Nile: Explorers Document First-Ever Journey Down Entire River. NPR. Retrieved September 17, 2019.
- Ethiopian Electric Power Corporation. Power Systems Interconnection. Retrieved September 17, 2019.
- Moorehead, Alan. The Blue Nile. New York: Harper & Row, 1972.
- Penn, James R. Rivers of the World: A Social, Geographical, and Environmental Sourcebook. Santa Barbara, Calif: ABC-CLIO, 2001. ISBN 978-1576070420
- Phillips, Matt, and Jean-Bernard Carillet. Ethiopia and Eritrea. Footscray, Vic: Lonely Planet, 2006. ISBN 978-1741044362
- Ullendorff, Edward. Ethiopia and the Bible. London: Oxford U.P, 1968. ISBN 978-0197260760
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