The Polavaram flood water release spillway system, which is the largest in the world has been operated successfully in its first season by lifting 48 hydraulic gates in a very short time.
The hydraulic gates were lifted to control the flash flood lifted and simultaneously released 15 lakh cusecs of water through the spill channel into the Godavari in less time.
Furthermore, it is to be noted, that the lifting of gates was a risky task, as the Polavaram project is still under construction and all major works on the spillway have been completed by setting up hydraulic gates that can be operated automatically to release the flood water.
The lifting of all 48 gates proved their efficiency and the role of gates became crucial in releasing flood water easily into the Godavari through the approach channel, spillway, spill channel, and pilot channel for 6 km. The Godavari has had a record flood in 100 years due to rains and irrigation officials said that this is the first time in the history of 100 years that the Godavari has been flooded. However, the Polavaram project has been prepared in advance to withstand heavy floods from the top and all arrangements have been made to release the flood water from the spillway to the bottom. 48 gates and 42 radial gates were installed in the spillway along with the installation of 4 hydraulic cylinders to lift them. Similarly, 24 power pack sets were also installed on the spillway and the gates were operated.
The Polavaram project will have radial gates along with river sluice gates at the dead storage level. A total of 10 river sluice gates, each with 20 hydraulic cylinders two per gate, and 10 sets of power packs to operate. The flood approaching the spillway is first released through the river sluice gate and when there is dead storage in the reservoir, the gates are raised and water is released downstream to provide drinking and irrigation water to the Godavari delta.
Stay tuned for further updates.
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