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GS Paper: GS3

  • NASA-ISRO Synthetic Aperture Radar (NISAR)

    Why in the News?

    The NASA-ISRO Synthetic Aperture Radar (NISAR) has been successfully launched from Sriharikota using GSLV Mk-II.

    NASA-ISRO Synthetic Aperture Radar (NISAR)

    About NISAR (NASA–ISRO Synthetic Aperture Radar):

    • Launch Vehicle: GSLV Mk-II | Launch Site: Sriharikota, India
    • Mission Life: 3 years (planned); 5+ years (design)
    • Orbit: Sun-synchronous polar orbit at 747 km with 98.4° inclination
    • Objective: High-precision monitoring of Earth’s surface changes—tectonics, agriculture, ecosystems, ice, floods, and landslides
    • Data Access: Free and near real-time; disaster maps delivered in under 5 hours
    • Hardware Contributions:
      • NASA: L-band SAR, 12m antenna, avionics
      • ISRO: S-band SAR, satellite bus, launch services
    • Development and Collaboration:
      • Initial Concept: 2007 (NASA); ISRO joined in 2012
      • Formal Agreement: 2014
      • Investment: NASA – ~$1.16 billion; ISRO – ~$90 million

    Key Features of NISAR:

    • What is Synthetic Aperture Radar (SAR)?
      • Operates day/night, all-weather
      • Simulates large radar antenna via motion
      • Penetrates clouds, vegetation, and soil
    • Dual-Band SAR:
      • L-band SAR (1.257 GHz):
        • Deeper penetration; ideal for forests, tectonic shifts, permafrost
      • S-band SAR (3.2 GHz):
        • Surface details; supports agriculture, flood mapping, biomass tracking
    • Radar Antenna:
      • 12-meter deployable mesh reflector
      • Resolution: 3–10 m spatial; cm-level vertical
      • Swath Width: 240 km
    • Imaging Frequency:
      • Global land/ice coverage every 12 days
      • Less frequent in polar zones
    • Data Output: Generates 80 TB/day (3x current Earth observatories):
      • Biomass and cropland maps
      • High-resolution flood and infrastructure data

    Applications and Impact:

    • Disaster Relief: Before-and-after imagery for planning
    • Climate Monitoring: Glacier melt, forest degradation
    • Agriculture: Crop health, rotation, food security
    • Infrastructure: Detects land subsidence (dams, cities)
    • Strategic Value:
      • Most powerful Earth-observing radar satellite
      • First with dual SAR payload
      • Strengthens India–US space partnership (Artemis, human spaceflight)
    [UPSC 2010] Question: In the context of space technology, what is Bhuvan, recently in the news ?

    Options: (a) A mini satellite launched by ISRO for promoting the distance education in India (b) The name given to the next Moon Impact Probe, for Chandrayaan-II (c) A geoportal of ISRO with 3D imaging capabilities of India* (d) A space telescope developed by  India

     

  • Pralay Missile 

    Why in the News?

    The Defence Research and Development Organisation (DRDO) successfully conducted two consecutive test flights of the Pralay missile from the Dr. A.P.J. Abdul Kalam Island off Odisha’s coast.

    Pralay Missile 

    About Pralay Missile:

    • Developer: Defence Research and Development Organisation (DRDO), led by Research Centre Imarat (RCI) with Indian industry support.
    • Purpose: Tactical surface-to-surface missile for precision strikes along sensitive borders like the Line of Actual Control (LAC) and Line of Control (LoC).
    • Role: Enhances India’s conventional deterrence in short-range battlefield operations.
    • Targets: Designed to destroy high-value assets—radars, command centers, airstrips, and military infrastructure.

    Key Features:

    • Type: Quasi-ballistic surface-to-surface missile
    • Range: 150–500 km
    • Payload: 500–1,000 kg (conventional warheads)
    • Propulsion: Solid-propellant rocket motor
    • Launcher: Mobile platform for rapid deployment
    • Guidance: Advanced inertial navigation with <10 m Circular Error Probable (CEP)
    • Terminal Speed: Up to Mach 6.1
    • Maneuverability: Capable of mid-air trajectory changes to evade interception
    [UPSC 2023]  Consider the following statements:

    1. Ballistic missiles are jet-propelled at subsonic speeds throughout their fights, while cruise missiles are rocket-powered only in the initial phase of flight. 2. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile.

    Which of the statements given above is/are correct?

    Options: (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2*

     

  • Sundarbans set to become India’s Second-Largest TR

    Why in the News?

    The proposal to expand the Sundarbans Tiger Reserve by 1,100 sq km has received clearance from the National Tiger Conservation Authority (NTCA) and awaits approval from National Board for Wildlife (NBWL).

    Sundarbans set to become India’s Second-Largest TR

    About Sundarbans Tiger Reserve (STR):

    • Location: Situated in South and North 24-Parganas districts, West Bengal; lies at the southern tip of the Gangetic Delta.
    • Area: Presently 2,585.89 sq km; expansion to 3,629.57 sq km under proposal.
    • Status: Notified as a Tiger Reserve, National Park, Biosphere Reserve; part of the UNESCO World Heritage Site.
    • Unique Feature: World’s only mangrove forest with a viable tiger population.
    • Tiger Count: Over 100 tigers – 80 in core area, 21 in adjoining forests.
    • Landscape: Interconnected estuaries, tidal creeks, and 105 mangrove-covered islands.
    • Flora: Dominated by mangrove species like Avicennia, Rhizophora, Heritiera.
    • Fauna: Includes Royal Bengal Tigers, Fishing Cats, Estuarine Crocodiles, Irrawaddy Dolphins, King Cobras, and endangered reptiles and birds.
    • Boundaries:
      • East: Bangladesh border (Raimangal, Harinbhanga rivers)
      • South: Bay of Bengal
      • North/West: Matla, Bidya, Gomdi Rivers

    Back2Basics: Tiger Reserves in India

    • Overview: A Tiger Reserve is a legally notified area under the Wildlife (Protection) Act, 1972 for the conservation of tigers and biodiversity.
    • Governing Authority: National Tiger Conservation Authority (NTCA), Ministry of Environment, Forest and Climate Change.
    • Origin: Initiated under Project Tiger, launched in 1973.
    • Structure:
      • Core Zone: Highly protected; no human activity allowed; declared as National Park or Sanctuary.
      • Buffer Zone: Surrounds core; allows regulated human use and supports conservation-compatible livelihoods.

    Tiger Reserve Landscape in India (as of 2025):

    • Total Reserves: 58 (up from 46 in 2014)
    • Largest Reserve: Nagarjunasagar-Srisailam, Andhra Pradesh – 3,727.82 sq km
    • Oldest Reserve: Corbett Tiger Reserve, Uttarakhand – established in 1973
    • Newest Reserves: Guru Ghasidas (Chhattisgarh), Ranipur (Uttar Pradesh), Ramgarh Vishdhari (Rajasthan)
    • Top State: Madhya Pradesh – 7 Tiger Reserves
    • Tiger Density: Bandipur TR > Corbett TR > Kaziranga TR (148, 18.6 tigers/sq. km.)
    • Global Tiger Day: Celebrated on 29th July every year

     

    [UPSC 2020] Among the following Tiger Reserves, which one has the largest area under “Critical Tiger Habitat”?”

    Options: (a) Corbett (b) Ranthambore (c) Nagarjunsagar-Srisailam* (d) Sunderbans

     

  • Amrit Bharat Station Scheme (ABSS)

    Why in the News?

    PM recently stated that 77 stations in Tamil Nadu are being redeveloped under the Amrit Bharat Station Scheme (ABSS), positioning the state as a hub for railway transformation.

    About the Amrit Bharat Station Scheme (ABSS):

    • Launch: 2022 by the Ministry of Railways.
    • Goal: Modernise and develop railway stations through phased, long-term upgrades.
    • Master Plans: Each station gets a tailored roadmap for future improvements.
    • Focus Areas: Multimodal integration, seamless passenger movement, and upgraded amenities.
    • National Significance: Integral to India’s infrastructure push under the Viksit Bharat vision.

    Key Features of ABSS:

    • Passenger Comfort: Larger waiting halls, clean toilets, executive lounges, lifts, escalators, free Wi-Fi, and business-meeting zones.
    • Accessibility & Connectivity: Expanded circulating areas, barrier-free access for persons with disabilities, and smooth links to other transport modes.
    • Aesthetic Upgrades: Modern façades, clear signage, landscaping, and consistently clean premises.
    • Technology & Information: Digital displays, real-time train info, and self-service e-ticketing kiosks.
    • Sustainability: Energy-efficient systems, green-building elements, and water-conservation measures.
    • Customised Development: Station facilities scaled to local footfall and needs—no one-size-fits-all approach.
    [UPSC 2024] Consider the following statements:

    I. Indian Railways have prepared a National Rail Plan (NRP) to create a future ready railway system by 2028. II. ‘Kavach’ is an Automatic Train Protection system developed in collaboration with Germany. III. ‘Kavach’ system consists of RFID tags fitted on track in station section.

    Which of the statements given above are not correct?

    (a) I and II only (b) II and III only (c) I and III only (d) I, II and III*

     

  • Exercise ‘Bold Kurukshetra’, 2025

    Why in the News?

    The 14th edition of the India–Singapore Joint Military Exercise — Exercise Bold Kurukshetra — commenced in Jodhpur.

    About Exercise ‘Bold Kurukshetra’

    • Launch Year: 2005, after the 2003 India–Singapore Defence Cooperation Agreement.
    • Purpose: Strengthen bilateral defence ties, boost operational coordination, and enhance regional security.
    • Frequency: Held annually or biannually, alternating between Indian training zones like Babina and Jodhpur.
    • Participants: Focuses on armoured and mechanised infantry units from India and Singapore.
    • Framework: Conducted under United Nations Peacekeeping mandates, simulating mechanised warfare and joint operations.

    Key Features:

    • Format:
      • Tabletop wargaming and computer-based simulations.
      • Validates doctrines and standard operating procedures in mechanised warfare.
    • Operational Objectives:
      • Improve interoperability and tactical planning.
      • Execute joint manoeuvres and enhance command-level coordination.
      • Build mutual understanding of combat and operational doctrines.
    • Evolution Over Time:
      • Progressed from basic drills to complex command post exercises and live-fire missions.
      • Includes scenario-based planning and real-time decision-making via digital simulations.
    [UPSC 2008] ‘Hand-in-Hand 2007’, a joint anti-terrorism military training was held by the officers of the Indian Army and officers of the Army of which one of the following countries?

    Options: (a) China *(b) Japan (c) Russia (d) USA

     

  • [28th July 2025] The Hindu Op-ed: How is India preparing against GLOF events?

    PYQ Relevance:

    [UPSC 2024] What is disaster resilience? How is it determined? Describe various elements of a resilience framework. Also mention the global targets of the Sendai Framework for Disaster Risk Reduction (2015-2030).

    Linkage: The article explicitly states that the NDMA has “markedly accelerated its efforts to manage these increasing risks” and initiated a “proactive shift from mere post-disaster response to risk reduction through its Committee on Disaster Risk Reduction (CoDRR)”. This directly links to the concept of “disaster resilience” and “Disaster Risk Reduction (DRR),” which are central to India’s preparedness strategy for GLOF events.

     

    Mentor’s Comment:  On July 8, 2025, Nepal experienced a major Glacial Lake Outburst Flood (GLOF), which triggered a flash flood along the Lende River, destroying a China-built friendship bridge and disabling four hydropower plants, cutting off 8% of Nepal’s power supply. This catastrophe highlights the growing threat of GLOFs due to glacial melt from rising temperatures in the Himalayas. The incident has raised concerns over the lack of trans-boundary early warning systems, particularly between China and Nepal. It also drew attention to India’s vulnerability, as the Indian Himalayan Region (IHR) contains 7,500 glacial lakes, many at high risk of GLOF due to climate change, poor monitoring infrastructure, and lack of early warning systems. India’s National Disaster Management Authority (NDMA) has responded by launching a national programme targeting 195 at-risk glacial lakes, focusing on hazard assessment, early warning systems, risk mitigation, and community engagement.

    Today’s editorial analyses the major Glacial Lake Outburst Flood (GLOF) in Himalaya region. This topic is important for GS Paper III (Environment) in the UPSC mains exam.

    _

    Let’s learn!

    Why in the News?

    Recently, Nepal faced a major Glacial Lake Outburst Flood (GLOF), which led to a sudden flash flood along the Lende River.  

    What are GLOFs?

    • GLOFs are sudden floods caused by the breach of natural or man-made dams holding glacial lakes, releasing large volumes of water.
    • Himalayan Spread: The Himalayas across India, Nepal, Bhutan, and Tibet host thousands of glacial lakes, many near international borders. India has 7,500+ glacial lakes, with 200+ deemed potentially dangerous.

     

    What are their transboundary risks in the Himalayas?

    • Trans-boundary Risk: GLOFs from upstream countries (e.g. China) can impact downstream nations (India, Nepal, Bhutan) without early warning. Eg: The July 2024 Tibetan GLOF damaged Nepal’s Rasuwagadhi hydropower project with no prior alert.
    • Lack of Data Sharing: Minimal real-time data exchange between neighbours hampers early warning and risk management. Eg: Nepal got no warning from China during the 2024 GLOF.

    How has climate change increased GLOF frequency in the IHR?

    • Accelerated Glacier Melting: Rising temperatures cause glacier retreat and formation of unstable glacial lakes. Eg: Milam Glacier, Uttarakhand shows rapid retreat, increasing GLOF risk.
    • Extreme Precipitation: Intense rainfall from climate change can overfill lakes, causing breaches. Eg: Gya GLOF (2014) in Ladakh followed heavy rainfall, damaging infrastructure.
    • Increased Landslides: Thawing permafrost and unstable slopes trigger landslides into lakes, displacing water and causing GLOFs. Eg: 2013 Chorabari Glacier landslide near Kedarnath worsened the flood impact.

    What measures has India taken for GLOF mitigation?

    • Early Warning Systems (EWS): Installed to detect rising water levels and trigger alerts. Eg: EWS at South Lhonak Lake, Sikkim before 2023 GLOF.
    • Satellite Monitoring: ISRO-NRSC use remote sensing to track glacial lakes. Eg: Monitored via Bhuvan portal in Ladakh, Uttarakhand, Himachal Pradesh.
    • Risk Mapping: NMSHE identifies high-risk areas for targeted intervention. Eg: Studies in Kinnaur and Chamoli flagged vulnerable lakes.
    • Engineering Measures: Lake drainage and structural control to prevent overflow. Eg: Work at Tsho Rolpa Lake (Nepal) as a replicable model.
    • Community Preparedness: NDMA and states run drills and awareness programs. Eg: Mock drills in Uttarkashi and Kullu.

    What are the gaps? 

    • Weak Early Warning Systems (EWS): India lacks real-time sensors, automated sirens, and alert mechanisms. Eg: No early alerts during Chamoli disaster (2021).
    • Low Community Preparedness: Most villages in Sikkim and Uttarakhand lack evacuation protocols and disaster training.
    • Poor Transboundary Coordination: Minimal data sharing with China hinders early action in regions like Arunachal Pradesh.
    • Infrastructure Vulnerability: Bridges and dams not designed for GLOFs.
      Eg: Chungthang dam breach (2023) exposed weak infrastructure.
    • Limited Scientific Capacity: Shortage of glaciologists, risk modelers, and ground validation limits NDMA’s effectiveness.

    Way forward: 

    •  Strengthen Early Warning Systems: Deploy real-time sensors, sirens, and automated alerts in high-risk zones.
    • Enhance Transboundary Cooperation: Establish formal data-sharing agreements with China, Nepal, and Bhutan.
    • Build Local Preparedness: Conduct regular community drills, awareness drives, and evacuation planning.
    • Climate-Resilient Infrastructure: Design dams, bridges, and power projects to withstand GLOF surges.
    • Invest in Research & Capacity: Train glaciologists, improve satellite-ground integration, and support Himalayan climate studies.

  • Novel Microscope observes Molecular Motion

    Why in the News?

    Over a century after Einstein explained Brownian motion, California Institute of Technology (Caltech) scientists have created a powerful microscope that shows molecules moving in real time at an extremely tiny scale.

    Novel Microscope observes Molecular Motion

    What is Brownian Motion?

    • Definition: Random movement of tiny particles in a fluid due to constant collisions with surrounding molecules.
    • Significance: Validated the existence of atoms and molecules; explained by Albert Einstein in 1905.
    • Particle Behavior: Smaller particles move faster and more erratically; larger ones move slower.

    About Caltech Microscope:  

    • Resolution: Angstrom-level (1 Å = 0.0000000001 m).
    • Speed: Captures hundreds of billions of frames per second.
    • Advantage: Wide-field, single-shot imaging with no sample damage.
    • How It Works?
      • Setup: Fluorescent molecules in water illuminated by ultrafast lasers.
      • Light Capture: Scattered light directed via Digital Micromirror Device.
      • Streak Imaging: Light converted to electron patterns revealing molecular size.
      • Reading Size: Faster changes = smaller molecules; slower = larger.
    [UPSC 2000] Which one of the following can be used to confirm whether drinking water contains a gamma emitting isotope or not?

    Options: (a) Microscope (b) Lead plate (c) Scintillation counter* (d) Spectrophotometer

     

  • Bamboo-Polymer Composite as alternative to Plastics

    Why in the News?

    IIT Guwahati researchers have created a strong, eco-friendly material using bamboo and biodegradable plastic to replace regular plastic in car interiors and other uses.

    About the Bamboo-Polymer Composite:

    • Origin: Made using Bambusa tulda, a fast-growing bamboo from Northeast India.
    • Composition: Reinforced with bio-based and petroleum-based epoxies for strength.
    • Objective: Reduce dependence on synthetic plastics in industrial sectors.
    • Process: Bamboo fibres undergo alkali treatment to bond well with polymers.
    • Evaluation: Tested across 17 parameters—tensile strength, water resistance, cost, etc.

    Key Features and Benefits:

    • High Strength: Suitable for load-bearing automotive components.
    • Thermal Stability: Can withstand high interior vehicle temperatures.
    • Low Moisture Absorption: Ideal for humid environments.
    • Eco-Friendly: Biodegradable, lowers environmental impact.
    • Cost-Effective: ₹4300 per kg—commercially viable.
    • Best Variant: Bamboo + bio-based epoxy FormuLite chosen through performance scoring.

    Applications:

    • Automotive: Dashboards, door panels, seat backs.
    • Electronics & Packaging: Lightweight, durable material.
    • Aerospace: Used for sustainable composite components.
    • Construction: Green alternative for interiors and fixtures.
    [UPSC 2021] Consider the following statements:

    1. Carbon fibres are used in the manufacture of the components used in automobiles and aircrafts.

    2. Carbon fibres once used cannot be recycled.

    Which of the statements given above is/are correct?”

    Options: (a) 1 only* (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2

     

  • [26th July 2025] The Hindu Op-ed: Kargil, Pahalgam and a revamp of the security strategy

    PYQ Relevance:

    [UPSC 2016] The terms ‘Hot Pursuit’ and ‘Surgical Strikes’ are often used in connection with armed action against terrorist attacks. Discuss the strategic impact of such actions.

    Linkage: The article explicitly talks about the India’s shift in counter-terrorism strategy, mentioning the surgical strikes after the Uri attack (2016) and the Balakot strikes (2019) following Pulwama as “a strong reply” and “statement of intent”. The article culminates in discussing Operation Sindoor after the Pahalgam attack (2025), which involved striking terror bases and military air-bases deep in Pakistan, setting a “new threshold” for India’s response to terror.

     

    Mentor’s Comment: This year, in light of the recent Operation Sindoor (May 7–10, 2025), launched by India in response to the Pahalgam terror attack. The operation demonstrated India’s enhanced conventional military strength and shift in counter-terrorism doctrine, drawing parallels with the Kargil War’s legacy of structural reforms, military modernisation, and strategic assertiveness.

    Today’s editorial analyses the Indian Military strength. This topic is important for GS Paper III (Internal Security) in the UPSC mains exam.

    _

    Let’s learn!

    Why in the News?

    July 26, 2025, marks the 26th anniversary of the Kargil War, a key moment in India’s military history.

    What key shortcomings did Kargil expose?

    • Intelligence Failure: There was a complete lack of actionable intelligence about Pakistani infiltration. Eg: Neither RAW nor military intelligence anticipated the large-scale intrusion in the Kargil sector, resulting in delayed response.
    • Lack of Real-time Surveillance and Reconnaissance: India lacked advanced aerial and satellite surveillance capabilities. Eg: Absence of drone surveillance led to Pakistani troops occupying key heights undetected.
    • Operational Unpreparedness in High-altitude Warfare: Indian troops were not fully equipped or trained for fighting in extreme mountain conditions. Eg: Soldiers lacked snow boots, high-altitude tents, and artillery support during initial engagements.
    • Inadequate Military Modernisation and Logistics: Outdated weaponry and logistical weaknesses slowed the military’s response. Eg: Lack of precision-guided munitions and night-vision equipment hampered operations in the early phase of the conflict.

    How did they influence India’s military reforms?

    • Revamp of the Intelligence Infrastructure: The intelligence failure in Kargil led to the creation of dedicated and tech-enabled intelligence agencies. Eg: Establishment of the Defence Intelligence Agency (DIA) in 2002 and the National Technical Research Organisation (NTRO) in 2004 improved surveillance and early warning systems.
    • Modernisation and Capability Building: Recognising operational gaps, India focused on military modernisation and indigenous defence production. Eg: Induction of Rafale fighters, Apache helicopters, and BrahMos missiles, along with enhanced focus on ‘Make in India’ defence projects.
    • Structural and Doctrinal Reforms: The need for faster, joint response led to organisational restructuring and new doctrines. Eg: Appointment of the Chief of Defence Staff (CDS) in 2019 and development of the Cold Start Doctrineenabled swift, coordinated operations across services.

    How has India’s counter-terror strategy evolved from Kargil to Operation Sindoor?

    • Shift from Strategic Restraint to Active Retaliation: Initially, India responded passively to terror attacks, but now adopts swift and punitive action. Eg: In Operation Sindoor (2025), India launched precision strikes on nine terror bases and eleven military airbases inside Pakistan within 96 hours of the Pahalgam attack.
    • Use of Air Power and Missile Strikes: India has moved beyond surgical ground raids to deep-strike capabilities using air and missile assets. Eg: The BrahMos missile strike on Nur Khan Base in Pakistan reportedly crippled a nuclear weapons storage facility, sending a strong strategic signal.
    • Preemptive and Coordinated Operations: Focus has shifted to pre-empting terror threats through real-time intelligence and coordinated special operations. Eg: In 2023, India conducted a pre-emptive operation in Kashmir’s Gurez sector, dismantling a terror launchpad before infiltration.
    • Internationalising the Terror Narrative: India increasingly leverages diplomacy and global platforms to isolate Pakistan as a state sponsor of terror. Eg: Following the Pulwama attack (2019), India worked with global powers to get Masood Azhar designated as a global terrorist by the UN Security Council.
    • Integration of Technology and Intelligence Networks: There is now enhanced use of surveillance drones, cyber intelligence, and inter-agency coordination. Eg: Operation Black Thunder II (2024) used real-time intelligence sharing between NTRO, RAW, and special forces to eliminate a high-value terrorist in less than two days.

    What are the challenges for India? 

    • Persistent Cross-border Terrorism: Despite reforms, Pakistan-based terror groups continue to pose a threat, using proxy warfare and non-state actors to destabilize regions like Jammu & Kashmir.
    • Cybersecurity Vulnerabilities: India is increasingly vulnerable to cyberattacks on its military, energy, and communication infrastructure by hostile state and non-state actors. Eg: In 2023, a suspected Chinese-origin cyberattack targeted the power grid in Ladakh, exposing gaps in cyber defence preparedness.
    • Delays in Defence Modernisation: The slow pace of procurement, bureaucratic hurdles, and over-dependence on imports affect India’s combat readiness. Eg: Delays in acquiring high-altitude drones and next-generation tanks have impacted operational planning in sensitive border areas like Eastern Ladakh.

    Way forward: 

    • Promote Jointness and Modernisation: Implement integrated theatre commands and upgrade military technology to ensure faster, coordinated responses.
    • Strengthen Border and Cyber Security: Deploy smart surveillance systems and enhance cyber defence to counter both conventional and hybrid threats.

  • The scientist who made ‘mangroves’ a buzzword

    Why in the News?

    World Mangrove Day was observed on July 26. The occasion also recalled the pioneering role of M.S. Swaminathan in promoting mangrove conservation through initiatives like the International Society for Mangrove Ecosystems (ISME), GLOMIS, and the fishbone canal method of restoration.

    Role of M.S. Swaminathan in mangrove conservation

    • As early as 1989, he advocated using mangroves for climate resilience in coastal areas.
    • Proposed developing salinity-tolerant crops (e.g., rice) using mangrove genes.
    • Played a key role in founding the International Society for Mangrove Ecosystems (ISME) in 1990, promoting global knowledge exchange.
    • Co-authored the Charter for Mangroves, which was later included in the World Charter for Nature (1992) by the UN.
    • Led Community-Based Restoration in India through the M.S. Swaminathan Research Foundation (MSSRF).

    What is the ‘fishbone canal’ method? What are its advantages?

    The method mimics the natural branching pattern of rivers. It allows tidal waters to penetrate deep into degraded mangrove areas. Eg: In Tamil Nadu’s Pichavaram, fishbone canals revived previously stagnant mangrove zones, promoting natural seed dispersal.

    Advantages of the method

    1. Facilitates Natural Regeneration: By improving hydrology, it creates conditions suitable for natural mangrove seedling establishment without extensive manual planting. Eg: In Odisha’s Bhitarkanika, the method led to spontaneous growth of native mangrove species.
    2. Cost-Effective: Compared to large-scale planting, this method is less resource-intensive 
    3. It preserves ecosystem integrity.

    How have global and national initiatives reshaped mangrove management?

    • Shift Towards Community-Based Conservation: Focus has moved from government-led to community-driven models, recognising local knowledge and stakeholder participation. Eg: Eg: Sundarbans’ Joint Forest Committees empower villagers in conservation.
    • Integration with Climate Resilience Strategies: Mangroves are now seen as vital for disaster risk reduction and carbon sequestration. Eg: Indonesia’s “Mangroves for Coastal Resilience” project links mangrove conservation with coastal protection and blue carbon goals.
    • Technological Interventions and Scientific Planning: Use of GIS mapping, remote sensing, and hydrological modelling has made restoration more precise and scalable. Eg: In Andhra Pradesh, the Integrated Coastal Zone Management Project used satellite data to identify degraded mangrove areas for targeted restoration.

    How did India’s mangrove policy evolve post-1980 ?

    • CRZ Inclusion (1991): Mangroves declared ecologically sensitive under CRZ Rules, restricting commercial activity.
    • Post-Tsunami Shift (2004): Indian Ocean Tsunami highlighted mangroves as bio-shields, leading to their inclusion in disaster risk and coastal zone policies.
    • Boost in Support (Post-2005): Initiatives like the National Coastal Mission and remote sensing-based mapping promoted monitoring and restoration.

    What are ISME and GLOMIS?

    • ISME (International Society for Mangrove Ecosystems) is a global non-profit organization founded in 1990 to promote the conservation, restoration, and sustainable use of mangrove ecosystems through research, training, and international cooperation. It also offers technical support and capacity building for sustainable mangrove management.
    • GLOMIS (Global Mangrove Database and Information System), developed by ISME, is a centralized database that provides scientific data, GIS mapping, and case studies to support effective mangrove management and policymaking worldwide. GLOMIS serves as a database for mangrove species, restoration efforts, and GIS data.

    Way forward: 

    • Strengthen Community-Based Restoration: Empower local communities through training, sustainable livelihood support, and participation in restoration using techniques like the ‘fishbone canal’ method for greater ecological success.
    • Leverage Technology and Global Networks: Use remote sensing, GIS, and platforms like GLOMIS for monitoring mangrove health, while collaborating with international bodies like ISME to adopt best global practices.

    Mains PYQ:

    [UPSC 2019] Discuss the causes of depletion of mangroves and explain their importance in maintaining coastal ecology.

    Linkage: This question is directly and explicitly about mangroves, focusing on two key aspects: their depletion and their importance in maintaining coastal ecology. The fact that such a detailed question appeared in the examination signifies the recognized environmental importance and public awareness surrounding mangroves. A scientist’s work to popularize mangroves would logically contribute to this level of public and academic interest.