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شرکت توسعه منابع آب و نیروی ایران
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In this section the project is introduced in form of following items:
  • Generating annual hydroelectric energy of about 4500 GW/h
  • Controlling seasonal floods of Karun River and upstream dams
  • Regulating downstream water, used for agricultural purposes
  • Creating tourism attractions
History and background
After studying hydroelectric potentials of Catchment area of Karun River in 1960s, the issue of developing and making big reservoirs (between kilometer 490 of the river and kilometer 800) were prospered. For developing Karun River between Gotvand and Shahid Abbaspour dams, some recommendations were presented by Harza Co. in 1967, by Monenko Co. in 1975 and by Akers Co. in 1982. The first proposed dam was in downstream of Shahid Abbaspour dam and it was Godar-Lander project which its studies were carried out by Moshanir- Lahmeyer consultants. Also other dams were studied by these Consultants which their approximate locations are as follows:
First option: River kilometer of 440
Second option: River kilometer of 419
Third option: including two sub-options in river kilometer of 383 and river kilometer of 377
Finally the contract of “Gotvand Olia” engineering services was concluded between the client and Moshanir-Kaytak consultants with the target of studying the feasibility of project execution in current location. The basic studies of Moshanir-Kaytak consultants was finished in 1997 and reviewed by Lahmeyer Co. In 2003, Mahab Qods Consulting Engineers were chosen as the project consultant for completing the studies of second phase and supervision of the operation.
Excavation of diversion tunnels and Gotvand Olia power plant began in April 1997, main civil works started in 2001 and the river was diverted into tunnels, after completion of upstream cofferdam in April 2003.
  • In 1997 basic studies of the project was finished by Moshanir-Kaytak J/V and reviewed by Lahmeyer Co.
  • In April of the same year the water diversion operation began with excavation of the diversion tunnels.
  • In 2003 karun River was diverted.
  • In 2003 upstream cofferdam of the project was constructed and excavation activities of power house started.
  • In autumn 2005, first power station’s draft tube installed in fourth unit.
  • In January 2006, embankment operation of clay core of dam body began.
Location and general layout
Location & general layout of projectGotvand Olia hydroelectric power plant project is located in 48° and 56¢ and 10² of east and 32°, 16¢ and 8² of north. It is situated in 380 kilometers of Karun River mouth and is distanced 10 kilometers to north-east of Gotvand city in Khuzestan province.
River specifications
Karun River originates from southern Zagros Mountains in Koohrang, Armand, Khorasan, Vang and Bazoft areas and after a distance of 80 kilometers along north-east to south-east, in Khorramshahr, joins Arvanrood and pours to the Persian Gulf.
Considering the discharge, this river is the greatest river of Iran. Karun River’s average annual long-term discharge, in the area of dam construction is 453 m3/s and its annual discharge is more than 14 billion m3.
Specifications of catchmnet area
Specifications of catchmnet areaMeasurement of the catchment area at the site of dam construction is almost 32425 km2, annual discharge of Karun River at the site of dam is about 453.9 m3/s and annual average rainfall is approximately 372.7 mm.
Dam location
Dam locationAs you can see in the picture, this dam is very high and it is constructed at the final points of Karun River entering into Khuzestan plain and in its downstream no other reservoir dam will be constructed.
  • The highest rock-fill dam being constructed
  • It has the biggest reservoir after Karkhe dam
  • It is the greatest water reservoir on Karun River
  • It is the last dam and power plant in downstream of Karun River
  • It has a decisive role in controlling upstream power plants and dams
  • It has the biggest water transfer tunnels considering the area of cross section and length
  • It generates the biggest amount of hydroelectric energy in the country
  • It has one of the deepest sealing walls among the world rock-fill dams
  • It has a unique compound system of sealing and sealing curtain
Important Effects
Gotvand Olia dam and power plant project has an important role in employing native manpower and has been capable of direct and indirect employment of 6000 people. After complete operation of this project, the capacity of country’s electricity generation will increase considerably. This capacity can be effective in industrial and civil electricity provision. In addition to that an important resource of water supply will be available with 4.5 billion m3 capacity and it will have extraordinary effect in growth of water relevant industries, especially fishery. It also supplies water to farms and will have a vital role in creating natural tourism attractions.
Totally the most important cultural, social and economical effects of this project are as follows:
  • Job-creating
  • Creating tourism attractions
  • Increasing the country’s hydroelectric capacity
  • Growth of Hydroelectric technology and industry
  • Increasing the capability of domestic consultants and contractors
  • Activating the domestic manufacturers of energy-related equipments
  • Promoting the international position of the country, considering the promotion of country’s electricity and water industry
  • Indirect elimination of deprivation through growth of the country’s electricity resources
  • Providing a big water reservoir for several purposes such as drinking, irrigating farms and fishing industry development
  • Securing downstream lands against destructive floods of Karun River