MarketNile
Company Profile

Nile

The Nile is a major north-flowing river in northeast Africa which empties into the Mediterranean Sea. At 7,088 kilometers (4,404 mi) long, it is the longest river in the world, although the volume of water it carries is much smaller than other major rivers such as the Amazon or the Congo. The Nile has played a central role in the environmental, economic, and cultural history of Africa for millennia.

Names and etymology
The English word "Nile" is derived from the Latin and the Ancient Greek (Neilos), which possibly originated from the Semitic term naḥal, meaning 'river'. In the ancient Egyptian language, the same word was used for 'Nile' and 'river': . Egyptians called their country meaning 'black', in reference to the dark color of the Nile floodwaters as they carried sediment from upriver. The English name "Blue Nile" is a translation of the Arabic name Al-Baḥr Al-Azraq. In the modern era, the river goes by several names within the Nile Basin. In Egypt, it is referred to as Al-Nīl, Baḥr Al-Nīl or Nahr Al-Nīl. In South Sudan, it is sometimes referred to by the Arabic Baḥr el-Jebel, , literally 'Mountain River'. In Uganda, the speakers of Luganda use the name Kiyira. Some Nubian peoples of Egypt and Sudan use the Nobiin name Áman Dawū ('Great Water'). Several tributaries (smaller rivers that merge into the Nile) and segments of the river incorporate "Nile" in their names, including: • Albert NileSegment of the White Nile flowing north from Lake Albert to Nimule • Black NileAn alternate name for the Atbarah RiverBlue NileOne of the two major tributaries of the Nile River • Kyoga NileSegment of White Nile from Lake Kyoga to Lake Albert • Main NileSegment of the Nile River downstream from the confluence of Blue Nile and White Nile • Mountain NileSegment of the White Nile from the mountains of Uganda to the plains of South Sudan • Victoria NileSegment of White Nile from Lake Victoria to Lake Kyoga • White NileOne of the two major tributaries of the Nile River • Yellow NileThe Wadi Howar, remnant of an ancient tributary that dried up several thousand years ago == Sources ==
Geography
The Nile River is a major river in northeast Africa which flows into the Mediterranean Sea. The Nile Basin is all land that drains into the Nile River, and it covers 2,927,843 kmabout 10% of the African continent (see adjacent map). The basin can be divided into seven regions; five of these regions encompass the longest course of the Nile River. Proceeding in a downstream sequence, these five regions are: the African Great Lakes, the Mountain Nile, the White Nile, the main Nile, and the Nile Delta. Two additional regions encompass major tributaries: the Blue Nile and the Atbarah River. African Great Lakes The African Great Lakes region contains the source of the Nile River as well as several large lakes that are part of the Nile River system: Lake Victoria, Lake Albert, Lake George, and Lake Edward. The source of the Nile is the Rukarara River within Rwanda's Nyungwe National Park, Mountain Nile The second region of the Nile Basin, proceeding downstream, is the Mountain Nile (). This region begins near the town of Nimule and extends to Lake No, and is entirely within South Sudan. After passing through Nimule, the river goes through the Fula Rapids and on to Jubathe capital of South Sudan. After Juba, the Nile passes through the town of Bor, then enters the Sudd, a large swamp located in a flat plain. The incline of the ground in the Sudd is only 1:13,000 rise over run, so the river slows down and widens. Lush vegetation, including sedges, papyrus, and common water hyacinth (an invasive species) clog the waterways and make navigation difficult. At the north edge of the Sudd swamp, the Nile passes through Lake No, a small lake where the Nile is joined by the Bahr el Ghazal River (Arabic: 'gazelle river')a tributary from the west. White Nile region (left) and the Blue Nile (right) are visible where they merge to form the main Nile (top left). Continuing downstream, the third region of the Nile Basin is the White Nile region which includes an stretch of river from near Malakal to Khartoum, the capital of Sudan. There it is joined by the Blue Nile. This portion of the river is a wide, calm stream with a fringe of swamps on both banks. The river here is shallow and undergoes significant losses due to evaporation. Where the White Nile merges with the Blue Nile, they are noticeably distinct colors. The White Nile is a lighter shade because the sediment it carries includes a significant amount of quartz and feldspar. This is in contrast to the Blue Nile which carries dark clay sediments originating from Ethiopia's basaltic rocks. The Sobat River is a tributary which joins the White Nile near the town of Malakal (after the Bahr el Ghazal confluence, before the Blue Nile). Its basinwhich includes the Machar Marshescovers about 225,000 square km. The Sobat floods between July and December. Main Nile is located on the main Nile near the border between Egypt and Sudan. Its electrical generators have the capacity to produce 2.1 gigawatts.|alt=A large concrete building next to a placid lake. Many large power transmission towers are next to the building. The fourth region of the Nile Basinthe main Nileextends from Khartoum to Cairo, the capital of Egypt. Since the Aswan High Dam was completed in 1970, the delta has begun to shrink because of erosion from currents in the Mediterranean Sea. In the past, erosion was balanced by new soils arriving in the form of sediment carried by the river; but the dam traps sediment in its reservoir, preventing new soil from reaching the delta. Blue Nile tributary is Gish Abay at the bottom of the bright line. The river flows north from there to Lake Tana at the top.|alt=A map of Ethiopia, showing a part of the Blue Nile River and Lake Tana. The longest course of the Nilewhich includes the White Nile tributaryhas several other tributaries that feed into it. The drainage basins of the Blue Nile tributary and the Atbarah tributary comprise the final two regions of the Nile Basin. The Blue Nile springs from hills in Ethiopia where it originates as a stream named Abay near the town of Gish Abay: is an Amharic word meaning 'source', and Abay is the name of the stream. Gish Abay flows into Lake Tana, a large, shallow lake, which has a single outflow where it adopts the "Blue Nile" name. The river then makes a wide loop: first south, then west through a spectacular gorge deep, then north passing through South Sudan into Sudan, where it joins with the White Nile at Khartoum to form the main Nile. Along its course, the Blue Nile generates electricity at several hydropower plants, including the Tis Abay hydropower project at the Blue Nile Falls, the Grand Ethiopian Renaissance Dam near the border between Ethiopia and South Sudan, the Roseires Dam near the town of Ad Damazin, and the Sennar Dam. The size of the Blue Nile's drainage basin is over 306,000 square km. Atbarah tributary The Atbarah River is a tributary of the Nile which arises in northern Ethiopia, and joins the Nile about north of Khartoum. Dams on the Atbarah include the Khashm el-Girba Dam, the Upper Atbara and Setit Dam Complex, and the Tekezé Dam (on the Tekezé River tributary). ==Hydrology==
Hydrology
on the main Nile. Flow and floods Although the Nile is the longest river in the world, it does not have the largest discharge. Its flowabout 87 km per yearis small compared to other major rivers. The Nile's discharge is only about 1% of the Amazon, 6% of the Congo, and 12% of the Yangtze. The annual contributions to the main Nile from the three primary tributaries are: 54% from the Blue Nile, 32% from the White Nile (including contributions from the Bahr el Ghazal and Sobat tributaries), and 14% from the Atbarah. The highlands of the White Nile and Blue Nile both experience seasonal rain, but the White Nile's flow into the main Nile is much more constant than the Blue Nile. This is due to the many lakes and wetlands on the White Nile, which moderate the cyclic effects of seasonal rainfall. As the White Nile passes through the Sudd swamps about half the water is lost to evaporation. In contrast, the flow of the Blue Nile varies widely through the year: it floods between July and October, due to summer monsoon rains. The waters of the Blue Nile are so substantial during the summer that the White Nile backs up during this time at the confluence. During the summer floods, the contributions to the main Nile are about 70% from the Blue Nile, about 20% from the Atbarah, and about 10% from the White Nile. At the peak of the flood, the daily flow into Lake Nasser is about 0.71 km, about three times the annual daily average of 0.23 km per day. Prior to the construction of dams on the Nile, the flow of the Nile in Egypt varied seasonally: higher in the summer/fall; lower in the winter/spring. However, following the construction of the Aswan High Damwhich created a reservoir that can hold about two years of river flow the flow downstream from that dam is now more constant year-round. Sediment transport The Nile carries sediment downstream. The movement of sediment is classified as suspended sediment (particles suspended in the water) or bedload (sediment on the river bottom that rolls or tumbles downstream). Ninety-seven percent of the transported sediment carried by the Nile comes from the Atbarah and Blue Nile, both of which originate in Ethiopia. The erosion and transportation of silt only occurs during the Ethiopian rainy season when rainfall is especially high in the Ethiopian Highlands; the rest of the year, the major rivers draining Ethiopia into the Nile have a weaker flow. The soil in the Nile Delta originated as rocks in Ethiopia. The cumulative amount of rock eroded in the past 30 million years from the Ethiopia headwaters of the Nile is about 102,000 km, which is roughly comparable to the volume of the soil in the Nile Delta (including the underwater portion) which is about 150,000 km. Sediment carried by a river into a reservoir can settle in the reservoir and reduce its storage capacity. Sediment accumulated behind the Sennar Dam, Roseires Dam (on the Blue Nile), and Khashm el Girba Dam (on the Atbarah) has significantly reduced the storage capacity of their reservoirs since they were built. Annual sediment transport measured at several locations are listed below. The bedload percentages are the ratio of bedload sediment to total (bedload and suspended) sediment. This data was collected before the construction of the Grand Ethiopian Renaissance Dam, which has a significant impact on sediment loads downstream of the dam. • Gilgel Abay, Ethiopia : 7.6 million tonnes of suspended, and an additional 0.7% of bedload • El Deim (at the border of Ethiopia and Sudan): 140 million tonnes • Aswan, Egypt: 0.14 million tonnes of suspended, and an additional 28% of bedload • Beni Sweif, Egypt: 0.5 million tonnes of suspended, and an additional 20% of bedload • Qena, Egypt: 0.27 million tonnes of suspended, and an additional 27% of bedload • Sohag, Egypt: 1.5 million tonnes of suspended, and an additional 13% of bedload Water sources and sinks in the Nile Basin is analyzed using hydrology: water input from rain is balanced by water output to the soil, evaporation, and streams.|alt=A schematic diagram shows water movements around a piece of ground. Arrows show water moving upward due to evaporation and transpiration; other arrows show water moving downward into groundwater recharge. As the river moves downstream, it gains volume in some regions and loses volume in other regions. A region is a "source" if the region contributes water; conversely, a region is a "sink" if the region removes water. Identifying sources and sinks is important to scientists who study water movement (hydrology), as well as policy makers who negotiate water sharing issues. The regions of the Nile Basin that are water sources are the upstream areas including the Ethiopian Highlands and the African Great Lakes region. The water sink areas are generally found in the downstream regions, including South Sudan, Sudan, and Egypt. The water balance methodology is employed to determine which regions are sources and which are sinks. Water balance is a hydrological principle that states that the water entering a region is balanced by the water leaving a region. For a given region, hydrologists measure (or estimate) precipitation, evaporation, transpiration, groundwater recharge, lake-filling rate, and net streamflow. Evaluating these values will indicate if a region is a source or a sink. Generally, a region is a source if the net streamflow is positive; conversely, a region is a sink if the net streamflow is negative. Sources and sinks: countries The following table summarizes water balance measurements for countries within the Nile Basin. Portions of countries outside the Nile Basin are excluded from the values. The "Source or Sink" column shows one of these values: • SourceThe country is a significant water source • SinkThe country is a significant water sink • NeutralThe country is not a significant source or sink Most of the per-basin data is presented as annual measurements (usually in km); but some data is also presented as an equivalent "depth" value (millimeters per year, covering the entire basin). Sources and sinks: tributaries since at least 622 CE; Egyptians kept records of maximum and minimum river levels from that gauge until 1921. Modern gauges to measure the river level began to be installed in the 1860s, and gauges that also measure the river's currentwhich provide more accurate flow informationwere installed beginning in 1900. == Ecology ==
Ecology
Animals The total number of fish species found in the Nile Basin is estimated at over 800. In the river alone, 128 species are found, belonging to 27 families. In addition to fish, animals that sometimes reside in the Nile's waters include hippos, crocodiles, and African buffalo. Other water dwellers include molluscs, crabs, and shrimp. Some of the bird species are endemic to the Nile Basin (such as blue-winged goose), while other species have a cosmopolitan distribution (including moorhen and osprey). Several species of heron, ducks, geese, and egrets live in the basin year-round, and 14 species of ducks and geese arrive only for winter residence. Of the gulls and terns in the basin, the vast majority are migratory. During the past thousand years, the ranges of some species have been reduced due to human encroachment on their habitat. Plants is native to still waters of the Nile Basin. The Great Lakes region of the Nile Basin includes plants such as the water lily, papyrus, and water hyacinth. The water hyacinth is an invasive species, and has adversely impacted the populations of native species in Lake Kyoga. Plants common in the Sudd swamp include species that thrive in deep flooding such as Vossia, hippo grass, reed mace, ambatch, and papyrus. The Sudd also hosts species that thrive in shallow flooding, for example Oryza, antelope grass, and Phragmites. Pollution Historically, the water of the Nile was noted for being drinkable, but in the late 20th century, it became less healthy in certain areas. Pollution is most pronounced in Lake Tana, near major cities, and in the Nile Delta. Sources of pollution in the Nile include agricultural, industrial, and household waste. There are 36 industries that discharge their pollution sources directly into the Nile, and 41 into irrigation canals. These types of industries are: chemical, electrical, engineering, fertilizers, food, metal, mining, oil and soap, pulp and paper, textile and wood. There are over 90 agricultural drains that discharge into the Nile that also include industrial wastewater. River pollution is most pronounced between Aswan and the Mediterranean Sea. The pollution there comes from human activities, agricultural runoff, and industrial waste. Concentrations of pollutants increase as the river flows downstream, due to the cumulative effects of pollution sources. The delta is susceptible to accumulated concentrations because of poor flushing actions, exacerbated by a flat topography and heavy silting in the riverbed. In the late 20th century, Lake Victoria experienced increased eutrophication resulting in excessive plant growth, which depletes oxygen levels in the water. The eutrophication is due to human activity, deforestation, and poor agricultural practices, and has caused algal blooms and a rapid proliferation of water hyacinth, which have disrupted the ecosystem. Conservation and human impact on the White Nile|alt=A large waterfall, with dense foliage on both sides. The Nile Basin was relatively wet and humid from 15 thousand years ago (KYA) to 5 KYA, which enabled the start of large-scale agriculture in the Nile Basin around 5 KYA. In Egypt, overpopulation and the construction of the Aswan High Dam have led to the extinction or near-extinction of a large number of plant and animal species. The Nile perch was native to several places in Africa, including the Congo, but was not present in the Nile River or its lakes until it was surreptitiously introduced to Lake Victoria in the 1950s to create a fishing stock. The Nile perch also led to increased deforestation, because firewood was required to process the fish. The satellite lakes of Lake Kyoga are potentially important for future conservation efforts, because they contain at least 60 species of haplochromines, and have not yet been invaded by the Nile perch. Climate and climate change The climate of the Nile Basin is characterized by a gradient, transitioning from very dry in the north to wetter to the south. The basin can be divided into nine distinct rainfall regions: the northern regions (Egypt and Sudan) are very dry all year; the middle regions (including Ethiopia) have strong peaks of rainfall in the summer; and the southern regions (around Lake Victoria) have two rainfall peaksin spring and fall. The majority of the rainfall in the Nile Basin is associated with the summer monsoon. The Nile Basin is experiencing climate changes related to the increasing prevalence of greenhouse gases in the atmosphere. Some projections for the 21st century predict a temperature increase of 2 to 4 °C. Models of the future climate in the North Africa and Middle East region predict an increase in the frequency and severity of droughts, and increasing variability of precipitation. The Nile Delta is particularly vulnerable, and the combined action of sea level rise and lack of sediment replenishment (due to dams on the Nile) may cause one third of the surface area of the Nile Delta to disappear within the next century. == Geological history==
Geological history
The Nile River is a relatively young river which evolved from ancestral river systems that followed significantly different courses. Over millions of years, tectonic and environmental forces shifted, separated, and merged rivers, eventually producing the current form of the river. One hypothesis describes the Nile's geological history as a sequence of the following five evolutionary periods. The first evolutionary period was from about 20 million years ago (MYA) to 6 MYA. Around 20 MYA, the west flank of the East African Rift System began to uplift, separating the African Great Lakes region from the Congo basin. About 6 MYA, the ancestral Nile River in Egypt was a relatively short river, originating near the modern Wadi Howar and flowing north into the Mediterranean Sea. Lake Victoria did not exist, and the rivers in the Ethiopian and Ugandan highlands did not flow north or connect to the Egyptian Nile. The second evolutionary period was from 6 to 5.4 MYA. Lake Tana in the Ethiopian Highlands probably formed in this period, and a large paleolakeObwerukaexisted where the modern Lake Albert and Lake Edward are. The Messinian salinity crisis happened in this period: the Strait of Gibraltar closed and the Atlantic Ocean could no longer fill the Mediterranean Sea, so the sea completely evaporated. The empty Mediterranean caused the ancestral Nile to cut a deep gorge in Egypt, called the Eonile. The river waters flowing through the gorge eroded a canyon several hundred meters below world ocean level at Aswan, and below at Cairo. After the Strait of Gibraltar reopened, the sea refilled and the Eonile became a gulf which eventually filled with sediment. The third evolutionary period was from 2.5 to 0.5 MYA whenfor the first timethe Ethiopian waters flowed north and connected to the ancestral Egyptian Nile. The Rwenzori Mountains uplifted causing paleolake Obweruka to begin draining to the east (before, it drained to the west) and to start forming Lake Victoria. The waters forming Lake Victoria did not yet drain northward into Sudan or Egypt. The fourth evolutionary period was from 0.5 MYA to 15 KYA. Lake Victoria assumed roughly its modern shape, and the great lakes plateau tilted northward and began intermittently draining into Sudan and connecting to the ancestral Nile in Egypt, forming a series of rivers that approximately traced the course of the modern White Nile. Paleolakes formed in the area of the modern Sudd swamps. The fifth evolutionary period was from 15 KYA to the present. The African Great Lakes assumed their current shapes, and the flow from those lakes north to Sudan was no longer intermittent. Some paleolakes dried out in South Sudan and in Egypt near the Toshka Lakes. During this period, the summer monsoon shifted and substantially increased rainfall in the area of Lake Victoria and Lake Albert. The high water levels of both the Blue Nile and White Nile fluctuated widely during this period, with unusually high water levels occurring several times. The present-day course of the Nile was established early in this period. ==Human history==
Human history
Prehistory . The eastern Saharaincluding Egypt and Sudanwas much wetter during the African humid period which lasted from about 10,000 to 5,000 years ago. Pastoral herding cultures developed during that period, but when the climate became drier around 3,900 BCE, people were forced to migrate to the Nile River valley to survive. This was the origin of the Nubian cultures in Sudan and the Ancient Egyptian civilization. Ancient Egyptian civilization . The ancient Egyptian calendar was based on the flood cycle of the Nile. The year was divided into three seasons, each consisting of four months of thirty days each. The seasons were Akhet (literally, 'inundation'), Peret ('growing'), and Shemu ('harvest'). Akhet was the time of the year when the Nile flooded, leaving a new layer of fertile soil behind; Peret was the growing season; and Shemu was the harvest season when there were no rains. The Nile influenced their language: compass directions were based on a person facing upstream: the same word could be used for both up and south; another word for left and east; and another for right and west. They sometimes referred to rain as "Nile in the sky". Ancient Egypt consisted of two regions: Lower Egypt (the Nile Delta) and Upper Egypt (the Nile Valley, roughly between Giza and the first cataract). The Nile played a role in determining the unique character of each region, because the ever-shifting waterways in Lower Egypt meant that transportation routes, settlements, and administrative regions were often forced to relocate. The Lower and Upper regions were each represented by a unique Nile plant: papyrus and sedge, respectively. Ancient Egypt's southern boundary wasinformallyat the river's first cataract (near Elephantine Island) because transportation beyond those rapids was difficult. The Egyptians were familiar with the course of the Nile upstream to the sixth cataract (present-day Khartoum), but were not familiar with the river's course (nor its source) beyond that. The Nile led the Egyptians to build the world's first major dam now known as the Sadd el-Kafaracirca 2600 BCE in an attempt to control flooding. Nubian, Ethiopian, and Nilotic cultures was led by Kushite kings, also known as the Black Pharaohs. Around 780 BCE, the Kushite Empire arose along the banks of the Nile, including the Atbarah tributary. The Kushite Empire conquered much of Egypt under the rule of its Black Pharaohs, who led the empire from the cities Napata and Meroë on the banks of the Nile. After the rise of Christianity, Christian kingdoms in Nubia (including Nobatia, Makuria, and Alodia) developed along the Nile. In the area occupied by modern Eritrea and northern Ethiopia, the Kingdom of Aksum flourished from the 1st century to 960 CE. Aksum primarily used the Red Sea for transport, but the Atbarah and Blue Nile were also within its realm. The Funj Sultanate (1504 to 1821) ruled over the area approximately covered by modern Sudan. The Ethiopian Empire (1270–1974) occupied the areas of modern Ethiopia and Eritrea. The Nile Basin is home to the Nilotic peoples, a broad group of communities which originated near the Nile in what is now South Sudan, and migrated south and east into present-day Uganda and Kenya. Nilotic peoples include the Dinka and Nuer, who are South Sudan's largest ethnic groups; both are semi-nomadic cattle herders who practice nomadic pastoralism, moving their cattle seasonally in response to the Nile's floods. Egypt from Roman era to colonial era was built by Muhammad Ali (ruler of Egypt from 1805 to 1848) to support irrigation and transportation. These early dams were built during the rule of Muhammad Ali (ruler of Egypt from 1805 to 1848). The first small dams were constructed in the Nile Delta and near Cairo, and acted to extend the growing season of crops. Ali also built canals including the Mahmoudiyah Canal, started in 1818. Search for the source of the Nile Since the time of the ancient Greeks, Europeans have been curious about the source of the Nile and the origin of its floods. Herodotus was a Greek historian who visited Egypt in 457 BCE and traveled up the Nile to Aswan; he was puzzled by the Nile floods, which began in the summera season when Egypt had no rainfall. Geographers in Europe, Africa, and Arabiadating back to Eratosthenes in the second century BCEspeculated that the source was a collection of lakes in central Africa. Many early maps of Africa showed the Nile River originating in large lakes in Africa's interior (see adjacent image) but until the 1600s they were all speculative and not based on firm scientific knowledge. The source of the Blue Nile was established as a result of Portuguese interest in Ethiopia: the Jesuit missionary Pedro Páez visited the sourceGish Abayin the early 17th century, and wrote História da Ethiópia describing his time in Ethiopia. His accounts do not contain a specific date for his visit to Gish Abay. Later European explorers who reached Ethiopia in the 17th and 18th centuriesincluding Jerónimo Lobo and James Brucepublicized Páez's writings and estimated that he visited the source between 1613 and 1618. The source of the White Nile proved to be more difficult to establish than that of the Blue NileLake Victoria was not definitively established as a major source of the White Nile until 260 years after Gish Abay was identified as the Blue Nile's source. In 1858, John Hanning Speke was the first European to see Lake Victoria, and he later found a river flowing out from the north side of the lake which he concluded was the Nile. He did not follow that river from Lake Victoria to Sudan, leading some to doubt his conclusion that the lake's outflow was the Nile. Efforts to precisely pinpoint the farthest source of the White Nile began in the early 20th century when Richard Kandt suggested that the source was a tributary of the Kagera River in the Nyungwe Forestthe Kagera feeds into Lake Victoria. The source location was refined in 1969 when a group of researchers from Waseda University identified a specific tributary of the Kagera. In 2006, a group of adventurers rediscovered the 1969 location, and placed a large marker on a nearby tree. In 2009, academics used satellite imagery to further refine the location of the source, placing it at a spring several km from the 1969/2006 source. == Water politics in the modern era==
Water politics in the modern era
The Nile crosses several international borders, making it a transboundary river and the subject of political tensions. Colonial era After British colonial rule of Egypt commenced in 1882, they started additional water projects to enhance cotton production and support the rapidly growing Egyptian population. The first major dam built on the Nile was the Aswan Low Dam, completed in 1902. Its height was raised twice: in 1912 and 1933. Other dams built under the colonial regime include the Sennar Dam, built between 1914 and 1925 on the Blue Nile in Sudan, and the Jebel Aulia Dam, completed in 1937 near Khartoum. The primary purpose of the dams built in the 20th century was to support irrigation; hydropower generation was only a secondary goal. In 1929, an agreement between Egypt and Anglo-Egyptian Sudan was reached. The agreement provided that Egypt and Sudan utilize 48 and 4 billion cubic meters of the Nile flow per year, respectively. Egypt reserved the right to monitor the Nile flow in the upstream countries, to undertake river-related projects without the consent of upriver nations, and to veto any construction projects that would adversely affect Egypt. Post-colonial era were relocated to higher ground when the Aswan High Dam was built and submerged their original location. Egypt and Sudan became independent from Britain in the mid-1950s. In 1959 Egypt and Sudan updated the 1929 water-sharing agreement. The new agreement allocated the water to be shared between Egypt and Sudan at 55.5 and 18.5 billion cubic meters respectively. Upstream countries within the Nile Basin were excluded from the 1959 agreementincluding Ethiopia, which is the source of over two-thirds of the Nile's water. The 1959 agreement included terms permitting Egypt and Sudan to build dams, which they did: Egypt built the Aswan High Dam (completed 1970); Sudan built the Khashm el-Girba Dam (1964), Roseires Dam (1966), Merowe Dam (2009), and Upper Atbara and Setit Dam Complex (2017). In 1960, Egypt started building the Aswan High Dam which stores roughly two years' flow of the Nile River. The dam effectively turned the downstream stretch of the Nile (from the dam to the sea) into a large irrigation canal. The dam has positive impacts: more water is available for irrigation, and hydropower has provided more electricity for Egyptian manufacturing. Negative impacts of the dam include poorer water quality, reduced fertility of soil due to lack of new sediment deposited by floods, increased salinity of soil, schistosomiasis, habitat loss for native flora and fauna, and displacement of Nubians. The Aswan High Dam flooded a large area of the Nile Valley, and would have submerged several important historical monuments. An international campaign to save some monuments from becoming submerged by the new reservoir successfully saved some monuments, including the Abu Simbel temples. The Aswan High Dam also forced the relocation of many Nubians that lived in the valley inundated by the new reservoir. The Nubians were removed from their ancestral homelands, and many were forced to migrate to cities in Egypt and Sudan. Late 20th century disagreements and negotiations Throughout the 20th century, there was a marked imbalance in political power within the Nile Basin: Egypt and Sudan in the north wielded more power than the other ten nations to the south. In the late 20th century, African nations participated in several efforts to establish water-sharing policiesincluding the Undugu Commission (active from 1983 to 1993) and TECCONILE (active 1993 to 1998) but were not successful in creating long-term agreements. In 1999, nine of the ten Nile Basin countriesBurundi, Democratic Republic of the Congo, Egypt, Ethiopia, Kenya, Rwanda, Sudan, Tanzania and Ugandaestablished the Nile Basin Initiative to promote peaceful dialogue regarding issues related to the Nile Basin. Power shift to upstream nations , completed in 2025, generates over 5 gigawatts.|alt=A photograph of large concrete dam and the reservoir it creates. The photo is taken from an aerial viewpoint, looking down from above. Large plumes of white water spray over a spillway. At the start of the 21st century, power shifted to the upstream nations as they began to build dams without the consent of Egypt or Sudan. In 2008, Ethiopia built the Tekezé Dam without seeking permission of Egypt or Sudan. In 2010, five upstream countriesUganda, Ethiopia, Rwanda, Tanzania, and Kenyasigned a new agreementthe Cooperative Framework Agreementwhich aimed to allocate waters more equitably for upstream countries. Kenya was motivated to sign the agreement because it had plans to pump water out of Lake Victoria for irrigation. The 2010 agreement was opposed by Egypt and Sudan. In 2011, South Sudan became independent from Sudan, becoming the eleventh country in the Nile Basin. In subsequent water disputes, South Sudan allied with the upstream nations rather than with Sudan. In 2011, Ethiopia announced plans to build a large dam on the Blue Nile near the border with Sudan. The dam was later named the Grand Ethiopian Renaissance Dam (GERD). Ethiopia viewed the GERD as essential to the nation's future, because the electrical power generated by the dam would enable them to significantly increase the quality of life of their population. Egypt was concerned that the dam would imperil the irrigation of their crops because Egypt already uses nearly all of the river water that enters their country, and they were concerned that the new dam would lead to water shortages. Sudan was concerned about safety and water supply. After the dam was announced, Egyptian president Mohamed Morsi hinted that military strikes on Ethiopia were an option, and Sudan and Egypt conducted several joint military exercises. Numerous negotiations were conducted between Ethiopia, Sudan, and Egypt while the dam was constructed and the reservoir was filled. In 2015 the countries signed a "Declaration of Principles" which contained high-level agreements regarding water usage and reservoir filling procedures. In 2019, the United States hosted talks between the involved nations. In 2020, the African Union started facilitating talks. That year, Egypt asked the United Nations Security Council to intervene, but it declined to do so. In 2021 and 2022, the UAE hosted talks. Construction of the GERD dam was completed in 2020, and in 2025 the reservoir was full and most of the dam's generators were producing electricity. ==Economy ==
Economy
Agriculture ) are the result of an irrigation system that pumps Nile water out of Lake Nasser. There is a significant difference in agricultural practices between the northern nations of the Nile Basin (Egypt, Sudan, and South Sudan) and the southern nations (Uganda, Ethiopia, etc). The north is primarily a desert, yet the south receives significant rainfall; crops in the north rely primarily on irrigation, whereas the south relies on rainfall retained in the soil; crop yields are higher in the north (due to intensive use of fertilizers and pesticides) than in the south; and the north has extensive irrigation infrastructure (dams, canals, etc) supported by governmental policies and international funding sources. The amount of soil water used annually for crops in the south is 229 km, which is more than twice the total annual water flow of the Nile River (about 100 km). Crop yields in the south are adversely influenced by longer distances to market; in contrast to the north, where nearly all farms are concentrated in a narrow strip along riverbanks with ample transportation opportunities. The lack of rainfall and groundwater leads Egypt to rely on the Nile for virtually all its water needs. Principal crops grown in Egypt include cotton, wheat, corn, rice, sorghum, and fava beans. Egypt's land is 94% desert and 3% arable land. The vast majority of Egypt's farmland is located in the Nile Delta, with the remainder along the banks of the Nile. The primary crops in Sudan are peanuts, cotton, sesame, sugarcane, and sorghum. Other crops include millet, wheat, corn, and barley. Sudan's crops draw upon water from both the Blue Nile and White Nile, supported by several dams including the Sennar Dam and Khashm el-Girba Dam. Much of the irrigated land is within the Gezira Scheme, an extensive irrigation project started in the 1920s. Fisheries was introduced to Lake Victoria in the 1950s to create a new fishery. In the 1950s, Nile perch and Nile tilapia were introduced into Lake Victoria in an effort to reverse the shrinking yields of native fishes in the lake; the effort was successful, but led to a decline in the number of native fish species in the lake. Currently, the vast majority of fish caught in Lake Victoria are Nile perch and Silver cyprinid (Lake Victoria sardine). Some fisheriesparticularly the Nile perchare primarily exported to Europe, rather than consumed locally. Fish farming is carried out in some parts of the basin. Hydropower .|alt=A map of northeast Africa. The Nile River is shown as a blue line. Along the Nile, locations of about ten hydropower stations are indicated. The Nile River and its tributaries power dozens of hydropower stations, which collectively have a capacity to generate over 10 gigawatts (GW) of electrical power. Prior to the year 2000, there were few dams on the Nile River, but thereafter, governments accelerated the pace of dam construction. Hydropower stations with capacities over 100 MW are listed in the table below. Transportation , Egyptare used to carry cargo on the river. The Nile has a flatter gradient in the north relative to the mountainous southern regionso the northern countries (Egypt, Sudan, and South Sudan) have more navigable stretches of water. In Egypt, the river has no major obstacles between the delta and the first cataract at Aswan, and as a consequence that stretch has been utilized heavily for transportation. That stretch could be used even before the arrival of steamships, because currents could carry boats downstream, and winds from the north often helped sailboats travel upstream. The Blue Nile is generally not navigable in most places. Instead of the river, Ethiopians and Italian colonizers used an overland routethe Strada Imperiale for north-south transportation in Ethiopia. As recently as 1903, explorers were still researching the Blue Nile to see if it could be used for transportation between Ethiopia and Sudan, but were not successful. In ancient Egypt, the river was the primary mode of transportation, and a wide variety of boats were builtboth utilitarian and ceremonial. Egyptian boats were sufficiently sturdy to carry large obelisks and stones for building pyramids and temples. In the modern era, the river is still used for transportation, particularly in Egypt, which has four navigable waterways suitable for large ships: two in the delta, one between the delta and the Aswan High Dam, and one in Lake Nasser. Egypt moves 500 million tonnes of cargo on the river per year, which is only about 0.8% of Egypt's total freight movement (the vast majority of freight moves by road or railway). Cargo transported on the river includes cement, limestone, coal, petroleum products, and phosphates. Upstream from Lake Nasser, the Nile and its tributaries contain waterfalls, cataracts, rapids, and dams that make long-distance navigation difficult. Another obstacle to navigation is the Sudd, a large swampy wetland on the White Nile in South Sudan. Plans to build a canal through the swampcalled the Jonglei Canalwere initiated in the early 20th century with the goal of providing more water to grow cotton in Egypt. Construction was briefly started in 1978, but the endeavor was soon halted. Tourism and recreation on the White Nile, between Lake Victoria and Lake Albert. The Nile Riverin particular, the stretch in Egypthas been one of the world's most popular tourist destinations for millennia, and has been the subject of a vast amount of travel literature. One of the most visited tourist destinations along the Nile is the Giza pyramid complexabout from the modern course of the Nile in Cairowhich has been a tourist destination since the time of the Greeks. The stretch of the Nile between Cairo and Aswan has long been a popular destination for tourists: during celebrations surrounding the opening of the Suez Canal in 1870, a large group of tourists took a boat ride on that stretch of the river and visited Luxor, Dendera, Saqqara, Edfu, and Philae. One of the world's first travel agencies, Thomas Cook & Son, started offering tours of the river in 1870 when the Suez Canal opened, and started regular steamboat cruises on the Nile in 1875. Since the construction of the Aswan High Dam in 1970, the dam itself has become a tourist attraction, along with the nearby temples that were moved during construction to avoid becoming submerged. The Aswan High Dam also benefited the cruise industry because the river from Aswan to the delta became safely navigable all year. The Nile Basin is home to several parks and nature reserves, including Uganda's Murchison Falls National Park and Egypt's Salouga and Ghazal Protected Area. The Bujagali Falls were once one of Africa's most notable rafting sites, but have become submerged due to construction of the Bujagali Power Station. == In culture==
In culture
Art and literature The river was frequently featured in ancient Egyptian art, often with kings fishing or harpooning hippopotamuses. Nilotic landscapes are also represented in artwork from ancient Greece and ancient Rome. A notable representation of the Nile in art is the Personification of the River Nile, a colossal marble sculpture from 2nd century CE Romenow in the Vatican Museum. The Nile is represented as a reclining man holding sheaves of wheat in his hand. At his side are a sphinxrepresenting Egyptand sixteen children which allude to sixteen cubits (the ideal height of the annual flood). At the base are crocodiles, pygmies, and hippopotamus. The Nile is seen in artworks that feature four major rivers of the world: Nile (Africa), Danube (Europe), Ganges (Asia), and Río de la Plata (Americas). Examples include the painting The Four Rivers of Paradise by Peter Paul Rubens (1615) and the fountain in Rome Fontana dei Quattro Fiumi designed by Gian Lorenzo Bernini (1651). In Bernini's fountain, the Nile is depicted as a man with his head covered in a cloth, symbolizing the mystery of the unknown source of the Nile. The Hymn to the Nile was composed and sung by the ancient Egyptian peoples; it celebrated the flooding of the Nile and the benefits it brought to Egyptian civilization. Giuseppe Verdi was commissioned by Isma'il Pasha to compose an opera to celebrate the opening of the Suez Canal. The opera, Aida, was performed at the newly-constructed Egyptian Royal Opera House in 1871. The opera's third act is set on the banks of the Nile River. Since the start of construction of the Grand Ethiopian Renaissance Dam, Ethiopian musicians have produced songs that celebrate and glorify the Nile and the dam. William Shakespeare has the character Marc Antony describe the Nile floods in the play Antony and Cleopatra: "Thus do they, sir: they take the flow o' the Nile By certain scales i' the pyramid; they know, By the height, the lowness, or the mean, if dearth Or foison follow: the higher Nilus swells, The more it promises: as it ebbs, the seedsman Upon the slime and ooze scatters his grain, And shortly comes to harvest." Agatha Christie wrote the popular 1937 mystery novel Death on the Nile, about a murder on a Nile steamboat, which inspired several adaptations. Adrift on the Nile is a 1966 novel by Egyptian author and Nobel Prize winner Naguib Mahfouz about a young man who lives on a houseboat on the Nile. The river is a metaphor for a life that he cannot control, leading him to turn his back on society. The Nile plays a prominent role in several video games, including Civilization VI. Myth and religion was responsible for the annual Nile floods. The sun god Ra passed through the sky each day from east to west, and the three phases of the day (sunrise, daytime, and sunset) corresponded to the human lifecycle: birth, life, and death. For this reason, many burial sites were positioned on the west bank of the Nile, where they would be closer to the setting sun. In the ancient Egyptian religion, no single god personified the Nile in the same way that the god Ra personified the sun. Gods associated with the river included Hapy (god of the annual floods) and Khnum (god of the first cataract), who were jointly responsible for producing the annual Nile flood that fertilized the country's farmland. The Egyptian religion placed the source of the Nile's annual flood at Elephantine Island (at the first cataract) where the floodwaters were believed to flow up out of the netherworld. Isis was a major deity in the Egyptian religion, strongly associated with the Nile River. Cults based on Isis spread from Egypt into Europe in the second century BCE. An example of the influence of the cult of Isis in Europe is the Nile mosaic of Palestrina, located in Rome and dated to the first century BCE: the 4 by 3 meter mosaic depicts a detailed Nilotic landscape. In Greek mythology, Nilus is the god of the Nile River, one of thousands of river-god children of Titans Oceanus and his sister-wife Tethys. Nilus was father of the naiad Memphis, mythical founder of the city of Memphis. The Nile River is mentioned in the Bible dozens of times, including a story in the Book of Exodus about the infant Moses being placed in a basket in the river. Some authorities identify the river Gihonwhich is mentioned in the Book of Genesis as one of the four Rivers of Paradiseas the Nile River. A story particularly important to the Coptic peoples of Egypt is found in the Book of Matthew: it recounts how Joseph and Mary fled to Egypt and lived near the Nile for several years, thus avoiding Herod. ==References==
tickerdossier.comtickerdossier.substack.com