Daily Current Affairs

August 26, 2025

Current Affairs

No Nod to Riverbed Mining without study on Sand Replenishment: SC

Context: In a major decision to curb environmental damage from sand mining, the Supreme Court ruled that no approval for riverbed mining can be granted without a scientific replenishment study.

Relevance of the Topic: Mains: Legal Framework for Sand Mining in India. 

Background: 

  • The ruling came in the backdrop of a case concerning sand and gravel extraction from the Shaliganga Nallah in Jammu & Kashmir, where mining was permitted to supply raw material for the construction of a four-lane Srinagar bypass project.
  • The J&K Expert Appraisal Committee had initially rejected the proposal citing over-exploitation and absence of replenishment data in the District Survey Report (DSR). However, environmental clearance was later granted despite these deficiencies, subject to shallow mining restrictions.
  • This clearance was challenged before the National Green Tribunal (NGT) by environmental activists who argued that the approval violated the Sustainable Sand Mining Guidelines.
  • The NGT in 2022 quashed the clearance, holding it to be environmentally unsound and procedurally defective.
  • The Union Territory of J&K, NHAI, and the private project proponent appealed against this order, but the Supreme Court upheld the NGT’s decision, affirming that replenishment studies are a mandatory requirement for granting mining approvals.

What is Replenishment Study?

  • A replenishment study is a scientific assessment of the rate at which sand, gravel, and other riverbed materials are naturally replaced in a given stretch of a river or stream.
  • It determines how much sand is deposited annually by the natural processes of erosion, weathering, sediment transport, and deposition.
  • It determines the maximum permissible extraction limits so that mining does not exceed natural recovery.

Recent Ruling of Supreme Court: 

  • The Supreme Court has described replenishment study as a mandatory requirement before giving clearance for sand mining. 
  • The court stated- "Just as forest conservation requires assessment of tree growth rate before permitting timber harvesting, a replenishment study enables us to take an informed decision as to whether sand mining can be permitted without degrading the river’s natural balance.”
  • The absence of replenishment studies makes a District Survey Report (which identifies potential areas for sustainable mining of minor minerals like sand, gravel, and stones ) as fundamentally defective.

Legal Framework for Sand Mining in India

  • Constitutional Provisions: 
    • Union List (Seventh Schedule) empowers Parliament to regulate mines and mineral development.
    • State List allows states to regulate mines and minerals, subject to Union control.
  • Mines and Minerals (Development & Regulation) Act 1957 (MMDR Act):
    • Provides the overarching legislative framework for mineral development in India.
    • Section 15 empowers state governments to frame rules for minor minerals, which include sand.
  • Environment Protection Act 1986 (EPA): Provides the basis for Environmental Impact Assessment (EIA) notifications regulating sand mining activities.
  • EIA Notification 2006 and Amendments: 
    • Made prior environmental clearance mandatory for all mining projects.
    • The Supreme Court in Deepak Kumar v. State of Haryana (2012) clarified that this requirement applies even to minor minerals irrespective of lease size.
    • The 2016 Amendment introduced the concept of District Survey Reports (DSRs) for scientific identification of mining sites, making them mandatory before granting ECs.
  • Sustainable Sand Mining Management Guidelines 2016: 
    • Issued under the EPA, these guidelines were the first comprehensive attempt to regulate sand mining sustainably.
    • They mandate the calculation of the annual rate of replenishment before any clearance is issued.
    • They also recommend restrictions on mining during monsoon season, cluster-based approaches for small leases, and the promotion of alternatives such as manufactured sand (M-sand).
  • Enforcement and Monitoring Guidelines for Sand Mining, 2020
    • These guidelines focus on strengthening compliance and monitoring. They recommend IT-enabled systems such as e-challans, GPS tracking of vehicles, drone surveillance, and satellite monitoring.
    • They direct states to constitute dedicated task forces and involve district-level authorities in enforcement.

Integrated Air Defence Weapon System (IADWS) 

Context: DRDO has conducted the maiden flight test of the Integrated Air Defence Weapon System (IADWS) off the coast of Odisha. 

Relevance of the Topic: Prelims: Features of Integrated Air Defence Weapon System (IADWS). 

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Integrated Air Defence Weapon System (IADWS)

IADWS is a multi-layered air defence system comprising: 

  • Indigenous Quick Reaction Surface-to-Air Missiles (QRSAM)
  • Advanced Very Short Range Air Defence System (VSHORADS) missiles 
  • A high-power laser-based Directed Energy Weapon (DEW) 

Three components of IADWS

Indigenous Quick Reaction Surface-to-Air Missiles (QRSAM): 

  • QRSAM is a short-range Surface to Air Missile (SAM) system. It is primarily designed to provide a protective shield to moving armoured columns of the Army from enemy aerial attacks.
  • The entire weapon system is configured on highly mobile platforms. It has search and track capability and can fire on short halts. The system has an operation range of 3 to 30 kilometers. 
  • The QRSAM weapon ensemble consists of a fully automated command and control system, two radars (Active Array Battery Surveillance Radar and Active Array Battery Multifunction Radar) and one launcher. Both the radars have a 360-degree coverage with ‘search on move’ and ‘track on move’ capabilities. 

Advanced Very Short Range Air Defence System (VSHORADS) Missiles: 

  • VSHORADS is a fourth-generation, technically advanced miniaturised Man Portable Air Defence System (MANPAD). 
  • The weapon system can neutralise targets between the range of 300 meters and six kilometers, including drones and other classes of aerial threats.
  • Effective against drones, UAVs, and low-flying aircraft. Designed for all three services: Army, Navy, Air Force. 

Directed Energy Weapon (DEW): 

  • High-power laser-based weapon (range < 3 km).
  • Neutralises UAVs, swarm drones by structural damage & disabling sensors.
  • Places India in the exclusive group of nations with operational DEWs.

While QRSAM has been designed and developed by the DRDO, VSHORADS and DEW have been developed by Research Centre Imarat (RCI) and Centre for High Energy Systems and Sciences (CHESS) respectively, both Hyderabad-based facilities of the DRDO.

Centralised Command and Control Centre: 

  • The integrated operation of all these weapon system components is controlled by a Centralised Command and Control Centre, developed by the Defence Research and Development Laboratory, Hyderabad.

Strategic Significance of IADWS

  • Enhanced Air Defence: Provides a multi-layered shield against UAVs, drones, and short-range missiles up to 30 km, strengthening national security.
  • Indigenous Capability: Showcases India’s self-reliance in defence technology, reducing dependence on foreign imports.
  • Network-Centric Warfare: Will integrate with IAF’s Integrated Air Command and Control System (IACCS) and Army’s Akashteer, improving jointness and real-time coordination.
  • Counter to Modern Threats: Combines missiles with Directed Energy Weapons, enabling defence against drone swarms and asymmetric aerial attacks.
  • Strategic Deterrence: Enhances India’s credibility to deter Pakistan’s drone incursions and China’s UAV warfare capabilities.
  • Mission Sudarshan Chakra: Marks an important step towards developing a indigenous nationwide security shield from multi-dominary enemy attacks under Mission Sudarshan Chakra by 2035.