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BENGALURU: The failure of the nineteenth crest gate of the 71-year-old dam throughout the Tungabhadra river on Sunday afternoon has put lakhs of individuals in Karnataka and Andhra Pradesh on excessive alert for potential flooding. The dam, located about 350km from Bengaluru, skilled a sudden surge of water because the gate collapsed.
The Tungabhadra mission, a multi-state enterprise, is run by the Karnataka govt.Gate 19 was carried away by substantial inflows to the mission through the late hours of Saturday. The breach within the gate has put lots of of hundreds of farmers and villagers within the states of Karnataka and Andhra Pradesh in danger. The affected districts in Karnataka embrace Ballari, Vijayanagara, Koppal, and Raichur, whereas in Andhra Pradesh, Kurnool and Nandyal are on alert. The 2 districts in Andhra Pradesh are located downstream of the dam, and Kurnool metropolis is positioned on the banks of the Tungabhadra river, making them susceptible to potential flooding.
What’s historical past of Tungabhadra dam?
- Sir Arthur Cotton, a British engineer from the Madras Presidency, conceived the Tungabhadra Dam mission in 1860. His main aims have been to offer
irrigation services, generate electrical energy, and management floods within the area. - The development of the dam started in 1949 as a three way partnership between the Kingdom of Hyderabad and the Madras Presidency. The mission was accomplished in 1953.
- The dam, also called
Pampa Sagar , is located throughout the Tungabhadra River close to the cities of Hosapete and Koppal. - The Tungabhadra reservoir, together with the Mullaperiyar dam in Kerala, holds the distinctive distinction of being the one two reservoirs in India that have been constructed utilizing a mixture of mud and limestone supplies.
Why is the Tungabhadra dam vital?
- Tungabhadra Undertaking supplies important providers to the residents of Karnataka, Telangana, and Andhra Pradesh.
- It considerably contributes to the irrigation of agricultural land, facilitating the cultivation of crops throughout two seasons on a powerful 6.5 lakh hectares.
- The mission performs an important position in producing hydroelectric energy, contributing to the power wants of the encompassing states.
- It assists in managing and controlling floods, mitigating potential injury attributable to extreme water stream.
- Tungabhadra Undertaking ensures a dependable provide of consuming water for the native inhabitants, enhancing their entry to scrub and protected water assets.
What has occurred?
- A
flood alert was issued in Karnataka’s Koppal area on Sunday after one of many gates of a large dam broke unfastened. - Officers stated rising water strain after heavy rain dislodged a gate of the Pampa Sagar Dam on Karnataka’s Tungabhadra river.
- In consequence, an unlimited amount of water has been gushing out of the gate.
What’s the outflow standing?
- Dam officers stated about 1,020 tonnes of water is capturing out of the broken Gate 19 each second, as towards roughly 1,130 tonnes by means of the opposite gates.
- Dam’s design permits for launch of as much as 6.5 lakh cusecs of water at a time.
- In Could 2024, the dam authorities carried out important upkeep and thorough examine of all crest gates.
- As of Saturday, the dam, which has a most storage capability of 133tmcft, was holding 100tmcft of water, with the remaining 33tmcft being silt.
What triggered the dam gate chain snap?
- On Saturday evening, 40,000 cusecs of water was being launched into the Tungabhadra river by means of 10 crest gates.
- The very best recorded launch was 3.6 lakh cusecs again in December 1992.
- At 12.50am, the nineteenth gate malfunctioned, inflicting a considerable stream of water into the river.
- All 33 crest gates have been opened to cut back the strain on the damaged gate. The discharge elevated to 1 lakh cusecs on Sunday morning.
How this may be mounted?
- Putting in a cease lock might resolve the difficulty, and the mission authorities have been making an attempt to minimise water launch.
- It is unattainable to restore the gate whereas water is gushing out of it, so the authorities might need to empty about 60% of the reservoir.
- Karnataka minister Shivaraj Tangadagi stated, “We might must launch at the very least 60 to 65 TMC water from the dam. The issue might be resolved solely after 20 toes of water is launched.”
- Dam officers say the discharge from the opposite gates will must be elevated to ease the strain on the damaged gate. All however 5 of the undamaged gates have already been opened.
- To interchange the broken gate, it’s essential to launch at the very least 60tmcft of the 100tmcft of water presently saved within the dam. This course of, together with the development of a brand new crest gate, is estimated to take as much as 4 days or presumably longer.
- In an effort to handle the state of affairs, 22 out of the 33 gates on the dam have been opened on Saturday night, permitting for the discharge of practically 1 lakh cusecs of water into the Tungabhadra river.
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