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Unveiling the Significance of the Aswan High Dam

Aswan High Dam
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The Aswan High Dam as seen from space
Aswan Dam is located in Egypt
Aswan Dam
Location of the Aswan Dam in Egypt
Official nameAswan High Dam
LocationAswanEgypt
Coordinates20px WMA button2b23°58′14″N 32°52′40″E
Construction began1960; 65 years ago
Opening date1970; 55 years ago
OwnerEgypt
Dam and spillways
Type of damEmbankment
ImpoundsRiver Nile
Height111 m (364 ft)
Length3,830 m (12,570 ft)
Width (base)980 m (3,220 ft)
Spillway capacity11,000 m3/s (390,000 cu ft/s)
Reservoir
CreatesLake Nasser
Total capacity132 km3 (107,000,000 acre⋅ft)
Surface area5,250 km2 (2,030 sq mi)
Maximum length550 km (340 mi)
Maximum width35 km (22 mi)
Maximum water depth130 m (430 ft)
Normal elevation183 m (600 ft)
Power Station
Commission date1967–1971
Turbines12×175 MW (235,000 hp) Francis-type
Installed capacity2,100 MW (2,800,000 hp)
Capacity factor54.6%
Annual generation10,042 GWh (2004)[1]

The Aswan Dam, or Aswan High Dam, is one of the world’s largest embankment dams, which was built between 1960 and 1970 across the Nile in Aswan, Egypt. The project was developed by the military regime that took power following the 1952 Egyptian revolution, to better control flooding, provide increased water storage for irrigation and generate hydroelectricity, the dam was seen as pivotal to the country’s industrialization plans. Like the earlier implementation, the High Dam has had a significant effect on the economy and culture of Egypt.

When it was completed, it was the tallest earthen dam in the world, surpassing the Chatuge Dam in the United States.[2] The dam, which created the Lake Nasser reservoir, was built 7 km (4.3 mi) upstream of the Aswan Low Dam, which had been completed in 1902 and was already at its maximum utilization.

With the old dam in place, the annual flooding of the Nile during late summer had continued to pass largely unimpeded down the valley from its East African drainage basin. These floods brought high water with natural nutrients and minerals that annually enriched the fertile soil along its floodplain and delta; this predictability had made the Nile valley ideal for farming since ancient times. However, this natural flooding varied, since high-water years could destroy the whole crop, while low-water years could create widespread drought and consequently famine. Both these events had continued to occur periodically.

As Egypt’s population grew and technology increased, both a desire and the ability developed to completely control the flooding, and thus both protect and support farmland and its economically important cotton crop. With the greatly increased reservoir storage provided by the High Aswan Dam, the floods could be controlled and the water could be stored for later release over multiple years.

The Aswan Dam was designed by Nikolai Aleksandrovich Malyshev of the Moscow-based Hydroproject Institute.[3][4] Designed for both irrigation and power generation, the dam incorporates a number of relatively new features, including a very deep grout curtain below its base. Although the reservoir will eventually silt in, even the most conservative estimates indicate the dam will give at least 200 years of service.[5]

Construction history

The earliest recorded attempt to build a dam near Aswan was in the 11th century, when the Arab polymath and engineer Ibn al-Haytham (known as Alhazen in the West) was summoned to Egypt by the Fatimid CaliphAl-Hakim bi-Amr Allah, to regulate the flooding of the Nile, a task requiring an early attempt at an Aswan Dam.[6] After his field work convinced him of the impracticality of this scheme,[7] and fearing the Caliph’s anger, he feigned madness. He was kept under house arrest from 1011 until al-Hakim’s death in 1021, during which time he wrote his influential Book of Optics.[8]

Aswan Low Dam, 1898–1902

The British began construction of the first dam across the Nile in 1898. Construction lasted until 1902 and the dam was opened on 10 December 1902. The project was designed by Sir William Willcocks and involved several eminent engineers, including Sir Benjamin Baker and Sir John Aird, whose firm, John Aird & Co., was the main contractor.[9][10]

Aswan High Dam prelude, 1954–1960

In 1952, the Greek-Egyptian engineer Adrian Daninos began to develop the plan of the new Aswan Dam. Although the Low Dam was almost overtopped in 1946, the government of King Farouk showed no interest in Daninos’s plans. Instead the Nile Valley Plan by the British hydrologist Harold Edwin Hurst was favored, which proposed to store water in Sudan and Ethiopia, where evaporation is much lower. The Egyptian position changed completely after the overthrow of the monarchy, led by the Free Officers Movement including Gamal Abdel Nasser. The Free Officers were convinced that the Nile Waters had to be stored in Egypt for political reasons, and within two months, the plan of Daninos was accepted.[11] Initially, both the United States and the USSR were interested in helping development of the dam. Complications ensued due to their rivalry during the Cold War, as well as growing intra-Arab tensions.

In 1955, Nasser was claiming to be the leader of Arab nationalism, in opposition to the traditional monarchies, especially the Hashemite Kingdom of Iraq following its signing of the 1955 Baghdad Pact. At that time the U.S. feared that communism would spread to the Middle East, and it saw Nasser as a natural leader of an anticommunist procapitalist Arab League. America and the United Kingdom offered to help finance construction of the High Dam, with a loan of $270 million, in return for Nasser’s leadership in resolving the Arab-Israeli conflict. While opposed to communism, capitalism, and imperialism, Nasser identified as a tactical neutralist, and sought to work with both the U.S. and the USSR for Egyptian and Arab benefit.[12] After the UN criticized a raid by Israel against Egyptian forces in Gaza in 1955, Nasser realized that he could not portray himself as the leader of pan-Arab nationalism if he could not defend his country militarily against Israel. In addition to his development plans, he looked to quickly modernize his military, and he turned first to the U.S. for aid.

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Egyptian President Nasser and Soviet leader Nikita Khrushchev at the ceremony to divert the Nile during the construction of the Aswan High Dam on 14 May 1964. At this occasion Khrushchev called it “the eighth wonder of the world“.

American Secretary of State John Foster Dulles and President Dwight Eisenhower told Nasser that the U.S. would supply him with weapons only if they were used for defensive purposes and if he accepted American military personnel for supervision and training. Nasser did not accept these conditions, and consulted the USSR for support.

Although Dulles believed that Nasser was only bluffing and that the USSR would not aid Nasser, he was wrong: the USSR promised Nasser a quantity of arms in exchange for a deferred payment of Egyptian grain and cotton. On 27 September 1955, Nasser announced an arms deal, with Czechoslovakia acting as a middleman for the Soviet support.[13] Instead of attacking Nasser for turning to the Soviets, Dulles sought to improve relations with him. In December 1955, the US and the UK pledged $56 and $14 million, respectively, toward construction of the High Aswan Dam.[14]

250px Nasser observing Aswan Dam construction
Gamal Abdel Nasser observing the construction of the dam, 1963

Though the Czech arms deal created an incentive for the US to invest at Aswan, the UK cited the deal as a reason for repealing its promise of dam funds. Dulles was angered more by Nasser’s diplomatic recognition of China, which was in direct conflict with Dulles’s policy of containment of communism.[15]

Several other factors contributed to the US deciding to withdraw its offer of funding for the dam. Dulles believed that the USSR would not fulfill its commitment of military aid. He was also irritated by Nasser’s neutrality and attempts to play both sides of the Cold War. At the time, other Western allies in the Middle East, including Turkey and Iraq, were resentful that Egypt, a persistently neutral country, was being offered so much aid.[16]

In June 1956, the Soviets offered Nasser $1.12 billion at 2% interest for the construction of the dam. On 19 July the U.S. State Department announced that American financial assistance for the High Dam was “not feasible in present circumstances.”[14]

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