Daily News Analysis

Krishnarajasagar (KRS) dam

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Context: Karnataka HC bans mining activity near KRS reservoir. High Court says ban will apply even on existing mining licences, adding, it will be in force till the completion of a study by experts and decision taken by the State committee on dam safety.

About Krishnaraja Sagar (KRS) Dam:

  • Krishnaraja Sagar (KRS) Dam is a gravity dam.
  • Situated below the confluence of the Kaveri River with its tributaries Hemavati and Lakshmana Tirtha, in Mandya district, Karnataka.
  • Usage:
    •  
    • The dam serves irrigation purposes in Mysore and Mandya, and it's a primary drinking water SOURCE for Mysore, Mandya, and Bengaluru.
    •  
    • It also facilitates power supply to the Shivanasamudra hydroelectric power station.
    •  
    • Water released from KRS Dam flows into Tamil Nadu and is stored in the Mettur Dam in Salem district.
  • History:
    • Constructed during the rule of Maharaja Krishnaraja Wadiyar IV and named in his honor.
    • Construction started in 1911 and completed in 1931.
    • Designed by Sir M. Visvesvaraya, a renowned Indian engineer.
  • Features:

    • Constructed using a mixture of surki mortar and limestone.
    • Dimensions: 2,621 meters (8,600 ft) long and 40 meters (130 ft) high.
    • Features 177 arch-type iron sluices, some equipped with automatic doors.
    • Reservoir spans approximately 130 sq. km, ranking as the largest in Asia during its construction.
    • Brindavan Gardens, an ornamental garden, is associated with the dam.

Key Facts about Kaveri River:

  • Kaveri, also spelled Cauvery, is a sacred river in southern India, often referred to as the Ganga of South India.
  • Originates on Brahmagiri Hill in the Western Ghats, Karnataka.
  • Flows southeast for 765 km through Karnataka and Tamil Nadu, descending the Eastern Ghats with significant waterfalls.
  • Cauvery basin spans Tamil Nadu, Karnataka, Kerala, and the Union Territory of Puducherry.
  • Drains into the Bay of Bengal at Poompuhar in Tamil Nadu.
  • Major left bank tributaries include Harangi, Hemavati, Shimsha, and Arkavati.
  • Major right bank tributaries include Lakshmantirtha, Kabbani, Suvarnavati, Bhavani, Noyil, and Amaravati.
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