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Atatürk Dam

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The Atatürk Dam is a massive engineering achievement located in Turkey.

Dams-GAP
Dams-GAP

It is a zoned rock-fill dam situated on the Euphrates River. This river flows along the border of Adıyaman and Şanlıurfa provinces. The dam is the third largest in the world. It was built to generate hydroelectric power and to irrigate large plains. Originally, the project was called the Karababa Dam. It was later renamed to honor Mustafa Kemal Atatürk, the founder of the Turkish Republic.

Ataturk regions-GAP
Ataturk regions-GAP

To function, the dam relies on a complex mechanical system. The dam structure holds back water to create the Atatürk Reservoir. This reservoir is the third largest in Turkey. Water flows from the reservoir into a hydroelectric power plant (HEPP). The HEPP uses eight Francis turbine and generator groups. Each of these groups has a capacity of 300 MW. Massive steel pressure pipes, called penstocks, carry the water. These penstocks weigh a total of 26,600 tons. As water moves through the turbines, it generates electricity. The plant can produce 8,900 GWh of electricity every year.

The dam serves several distinct purposes for the region. The first is electricity production through the HEPP. This plant is the largest of 19 power plants in the GAP project. The second purpose is large-scale irrigation for farming. Water is diverted through the Şanlıurfa Tunnels system. These are two parallel tunnels that are the largest in the world for irrigation. Each tunnel is 12 km long and 12 m in diameter. The third purpose is water regulation. The dam helps control the irregular flow of the Euphrates River. This prevents summer droughts and winter floods.

The history of the project shows how plans can grow. The initial development plan for the region was presented in 1970. At that time, the goal was to build the smaller Karababa Dam. However, the ambitions for regional development changed throughout the 1970s. Engineers decided to adopt the larger Atatürk Dam design instead. This change increased both the storage and the power capacities. Construction of the main dam began in 1983 and finished in 1990. It was completed in a record time of about 50 months. The power plant became fully operational in December 1993.

The scale of the Atatürk Dam is revealed through many significant numbers. The reservoir covers an area of 8,170 km2. It holds a total water volume of 48.7 km3. The dam's power capacity is 2,400 MW. This capacity provides about one-third of the total energy for the GAP project. Irrigation through the tunnels carries about 400 m3/s of water. This amount represents one-third of the total flow of the Euphrates. The project has had a massive impact on local agriculture. In the Harran plains, cotton production rose from 164,000 to 400,000 metric tons by 2001.

1 Million TL reverse
1 Million TL reverse

There are several surprising facts about the dam and its environment. Because the reservoir is so large, local people call it a "sea." The water level in the reservoir varies between 526 and 537 meters above sea level. The dam is also a subject of constant scientific study. Sensors monitor the rock-fill embankment for any deformations. It is estimated that the central portion of the dam crest has settled by 1.5 m since construction. Scientists also study how the water level affects local earthquakes. They have found that the water level and the rate of seismicity are anti-correlated.

The Atatürk Dam is a central part of a much larger system. It is the centerpiece of the Southeastern Anatolia Project, known as GAP. This project includes 22 dams on the Euphrates and Tigris rivers. The dam also has major geostrategic importance for the Middle East. About 90% of the Euphrates' annual flow begins in Turkey. The dam regulates how much water moves downstream to Syria and Iraq. This makes the dam a key part of international water management. The dam's importance was even recognized on Turkish currency. It appeared on the one-million-lira banknote from 1995 to 2005.

1 Million TL reverse
1 Million TL reverse
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