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Project Name: Syrdarya Control and Northern Aral Sea Phase-I Project – Consultancy Services for Detailed Design and Supervision of Construction Works
Country: KAZAKHSTAN
Finance Source: World Bank
Contract Price: Mott MacDonald Ltd.
Tags: Kazakhstan, World Bank, Irrigation, Design, Supervision
As a result of dropping of the Aral Sea level from 55 m to 36 m asl, 2 million ha salty area has been exposed. The Syrdarya Control and Northern Aral Sea Phase 1 Project (SYNAS) was identified as the first phase of an overall Syrdarya development program in the context of Aral Sea Basin Program (ASBP) initiated in 1993. Based on the river basin management concept the primary goal of the program is to restore and improve the existing ecological condition of the Syrdarya river delta and the Northern Aral Sea (NAS) by increasing the flow of water in the Syrdarya below Chardara Dam, providing adequate carrying capacity through the river and appurtenant hydraulic structures between Chardara and the Aral Sea, restoring the ecological balance of the Northern Aral Sea disaster zone, reducing the salinity of NAS from 30-40 g/lt down to 4-17 g/lt restoring and promoting economic activity in the Syrdarya delta and providing additional amounts of water for the delta and the NAS.
With this project sustainable water supplies will be ensured to approximately 200 000 ha of irrigated lands.
To achieve the goal of the project, the following measures have been identified:
(i) rehabilitation/reconstruction of weirs, dikes and hydraulic works along the whole river to improve discharge capacity and irrigation efficiency and (ii) the construction of a closure dike and spillway across the Berg Strait, the deep channel connecting NAS and Larger Southern Aral Sea, to control water levels in the NAS.
In this context the project comprises rehabilitation of one dam (Chardara Dam h=28.5 m), rehabilitation of four headworks (Aklak, Kazalinsk, Aitek, Kzylorda), construction of 13 km long dyke and spillway across Berg Strait of Aral Sea and for the rehabilitation of the hydraulic infrastructure of the Kazakhstan section of the Syrdarya river which is approximately 1000 km long, reconstruction of 321 km long flood protection dykes, construction of 180 km long new flood protection dykes and 5.7 km river straightening works.
