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DAILY NEWS ANALYSIS

  • 18 March, 2021

  • 3 Min Read

Rule Curve of a Dam

Rule Curve of a Dam

The Supreme Court ordered the Tamil Nadu govt. to give information on the ‘rule curve’ for the Mullaperiyar dam.

What is Rule Curve?

  • The ‘rule curve’ in a dam decides the fluctuating storage levels in a reservoir.
  • The gate opening schedule of a dam is based on the ‘rule curve’. It is part of the “core safety” mechanism in a dam.
  • Rules curves are used to guarantee the safety of the reservoir as well as water security.

About Mullaperiyar Dam:

  • The Mullaperiyar dam is located on the confluence of the Mullayar and Periyar rivers in Kerala’s Idukki district.
  • The dam is located on the Cardamom Hills of the Western Ghats
  • It is operated and maintained by the neighbouring state of Tamil Nadu even though, the dam is located in Kerala.
  • The dam is operated by Tamil Nadu following an 1886 lease agreement for 999 years.
    • It was signed between the Maharaja of Travancore and the Secretary of State for India during British Rule.
  • In the 1970s, the lease agreement was renewed by Tamil Nadu and Kerala.
    • It gave the former, rights to the water from the dam, in return, Kerala receives rent from Tamil Nadu.

Source: TH


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