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Home Geography

Mullaperiyar Dam

March 18, 2021
in Geography
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Mullaperiyar Dam
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In News: SC orders Mullaperiyar Dam Supervisory Committee to issue directions on issues concerning the dam’s safety.

About Mullaperiyar Dam

  •  Dam is a masonry gravity dam on the Periyar River in the Indian state of Kerala
  • It is located 881 m (2,890 ft) above mean sea level, on the Cardamom Hills of the Western Ghats in Thekkady, Idukki District of Kerala.It has a height of 53.6 m (176 ft) from the foundation, and a length of 365.7 m (1,200 ft)
  •  It was constructed between 1887 and 1895 by John Pennycuick and also reached an agreement to divert water eastwards to the Madras Presidency area (present-day Tamil Nadu). 
  • The Periyar National Park in Thekkady is located around the dam’s reservoir. 
  • The dam is built at the confluence of Mullayar and Periyar rivers. 
  • The dam is located in Kerala on the river Periyar, but is operated and maintained by the neighbouring state of Tamil Nadu.
  • Although the Periyar River has a total catchment area of 5398 km2 with 114 km2 downstream from the dam in Tamil Nadu,the catchment area of the Mullaperiyar Dam itself lies entirely in Kerala and thus not an inter-State river.

What is the issue ?

  • Lease agreement was renewed in the 1970s by both Tamil Nadu and Kerala 
    • Giving the former rights to the land and water from the dam by Kerala
    • Authority to develop hydropower projects at the site. 
    • Kerala would receive rent from Tamil Nadu.
  • The first cracks in this agreement surfaced in 1979 when a minor earthquake had resulted in cracks in the dam.
  • The Central Water Commission recommended lowering the water stored in the dam’s reservoir to 136 feet from 142 feet.
  • If definitive measures were implemented, only then could the Tamil Nadu administration raise water levels to the dam’s full capacity of 152 feet.

Supreme Court

  • In 2006, the Supreme court gave Tamil Nadu legal sanction to raise the water level to 142 feet.
  • In 2006, Kerala amended the 2003 Kerala Irrigation and Water Conservation Act, restricting the water level to 136 feet.
  • In 2012, however, an Apex court-appointed committee stated that the dam was “structurally and hydrologically safe” and that the Tamil Nadu government could raise water levels up to 142 feet.
  • In 2014, the court event struck down the amendment to the 2003 Kerala Irrigation and Water Conservation Act, calling it unconstitutional.
  • The Supreme Court had also directed the Centre and the governments of Kerala and Tamil Nadu to set up three panels to prepare a contingency plan in case of a disaster.
  • In direction of SC, In 2018, Dam Supervisory Committee Headed by A M Khanwilkar Form.
Source: The Hindu and DownToEarth
Tags: Down to EarthPrelims

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