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GS Paper: GS3

  • Analyzing Poverty Levels in India by Comparing various Surveys

    Why in the News?

    A recent study titled ‘Poverty Decline in India after 2011–12: Bigger Picture Evidence’ shows that poverty in India fell from 37% in 2004-05 to 22% in 2011-12. However, poverty declined by only an additional 18% until 2022-23, and officials have not released any poverty estimates after 2011-12.

    What are the three methods used to estimate post-2011 poverty in India?

    • Alternative NSSO Surveys: Using different socio-economic surveys like the Usual Monthly Per Capita Consumption Expenditure (UMPCE) from NSSO rounds after 2011-12, despite comparability issues with earlier surveys. Eg: Estimates based on UMPCE suggest poverty between 26-30% in 2019-20.
    • Private Final Consumption Expenditure (PFCE) Scaling: Scaling consumption data from the 2011-12 Household Consumption Expenditure Survey using the growth rate of PFCE from National Accounts Statistics (NAS) to estimate consumption trends. Eg: Used by economist Surjit Bhalla and colleagues in 2022.
    • Survey-to-Survey Imputation: Filling data gaps by linking related surveys (e.g., consumption surveys with employment surveys) through imputation models, often at the State level for better accuracy. Eg:  The recent study titled ‘Poverty Decline in India after 2011–12: Bigger Picture Evidence’ study using NSSO Employment-Unemployment Surveys with Consumer Expenditure Surveys to estimate poverty decline to about 18% in 2022-23.

    Note: Surjit Bhalla is an Indian economist, author, and columnist who served as Executive Director for India at the International Monetary Fund.

    How much has poverty declined post-2011–12, and how does it compare with the earlier period?

    • Sharp slowdown: Poverty fell from 37% (2004–05) to 22% (2011–12), a 15-point drop, but only to 18% by 2022–23, a mere 4-point reduction in over a decade.
    • Absolute poverty numbers: Number of poor declined from 250 million to 225 million in 10 years — a decline of only 10%, compared to a much faster fall earlier.
    • GDP correlation: GDP growth slowed from 6.9% (2004–12) to 5.7% (2012–23), consistent with slower poverty reduction.

    Why has the poverty reduction slowed since 2011-2012?

    • Slower GDP Growth: Average GDP growth declined from 6.9% (2004-05 to 2011-12) to 5.7% (2011-12 to 2022-23), correlating with slower poverty reduction.
    • Declining Real Wage Growth: Growth in rural wages slowed down significantly — from 4.13% annually before 2011-12 to 2.3% after 2011-12.
    • Rising Agricultural Workforce with Lower Productivity: After a decline in agricultural workers till 2017-18, 68 million workers joined agriculture post-2017-18, leading to lower agricultural productivity and wages, which hampers poverty reduction.

    How do the Poverty trends vary across Indian States? 

    • Significant Poverty Reduction: Some states have shown marked improvement in reducing poverty levels after 2011-12. Eg: Uttar Pradesh has notably decreased its poverty rate during this period.
    • Slow Progress: Historically poor states continue to struggle with slow poverty reduction due to persistent socio-economic challenges. Eg: Jharkhand and Bihar have experienced much slower declines in poverty rates.
    • Stagnation: Several large and economically important states have seen poverty reduction stagnate, with little change over the years. Eg: Maharashtra and Andhra Pradesh show almost no improvement in poverty reduction post-2011-12.

    What are the steps taken by the Indian Government? 

    • Implementation of Social Welfare Schemes: The government has launched various targeted welfare programs to support the poor and vulnerable groups. Eg: Pradhan Mantri Awas Yojana for affordable housing.
    • Focus on Employment Generation: Programs aimed at creating jobs, especially in rural areas, to increase income and reduce poverty. Eg: Mahatma Gandhi National Rural Employment Guarantee Act (MGNREGA).
    • Financial Inclusion Initiatives: Efforts to increase access to banking and financial services for the poor. Eg: Jan Dhan Yojana, which promotes opening of bank accounts for the unbanked.
    • Agricultural Support and Reforms: Policies to improve farmers’ incomes and agricultural productivity to support rural livelihoods. Eg: PM-Kisan Samman Nidhi, providing direct income support to farmers.
    • Health and Education Programs: Investments in healthcare and education to improve human capital and break the cycle of poverty. Eg: Ayushman Bharat health insurance scheme for poor families.

    Way forward: 

    • Rural Wage & Productivity Growth: Boost rural wages and agricultural productivity by implementing reforms, improving access to technology, and providing skill development to increase income and reduce poverty sustainably.
    • Data Accuracy & Monitoring: Improve data collection and real-time monitoring of poverty indicators to ensure precise measurement, enabling better-targeted policies and effective poverty alleviation programs.

    Mains PYQ:

    [UPSC 2015] Though there have been several different estimates of poverty in India, all indicate reduction in poverty levels over time. Do you agree? Critically examine with reference to urban and rural poverty indicators.

    Linkage: Estimates consistently show a reduction in poverty over time rather than the underlying surveys or methodologies used to produce them, answering this question effectively would require knowledge that various estimates exist, often derived from different data sources or approaches.

  • What are Shared Socioeconomic Pathways (SSPs)?

    Why in the News?

    A new ETH Zurich study warns that under the Shared Socioeconomic Pathway (SSP) 5-8.5 scenario, warming could make cyclones more intense and hit unusual regions with greater damage.

    What are Shared Socioeconomic Pathways (SSPs)?

    • Definition: SSPs are 5 global scenarios that show how changes in society, economy, and technology might influence climate adaptation and mitigation.
    • Purpose: They complement Representative Concentration Pathways (RCPs) by adding socioeconomic context to climate models.
    • Development: Created in the late 2000s, published in 2016, and used in the IPCC 6th Assessment Report and CMIP6 models.
    • Function: SSPs assume no new climate policies, helping scientists explore how global trends affect emissions and climate action.
    • The Five Pathways:
      1. SSP1: Sustainable and equitable world
      2. SSP2: Continuation of current trends
      3. SSP3: Regional rivalry with high population growth
      4. SSP4: Unequal world with high disparities
      5. SSP5: Fossil-fuel-based rapid economic growth
    • Usage: SSPs are used with RCPs to explore how different futures could affect the 1.5°C or 2°C warming targets.
    • Significance: They help policymakers assess how societal choices impact climate risks, emissions, and the feasibility of global goals.

    About SSP5-8.5 and Cyclone Risks:

    • Scenario Summary: SSP5 shows rapid economic growth fuelled by fossil fuels.
    • Radiative Forcing: SSP5-8.5 implies 8.5 W/mÂČ of energy, compared to about 2.7 W/mÂČ today.
    • Climate Target Gap: To limit warming below 2°C, forcing must stay around 2.6 W/mÂČ.
    • Cyclone Projections: Using the CLIMADA (climate adaptation) AI model, scientists studied past cyclone patterns and projected risks from 2015–2050.
    • Ecoregion Types:
      1. Resilient: Often affected, but recover quickly
      2. Dependent: Moderately impacted and adaptive
      3. Vulnerable: Rarely hit but slow to recover
    • Findings:
      • Time between severe cyclones in resilient areas may drop from 19 to 12 years.
      • East Asia, Central America, and the Caribbean will face stronger, more frequent cyclones.
      • Madagascar, Oceania, and the Philippines will face unprecedented cyclone activity.

    Impact on Mangroves and Coastal Ecosystems:

    • Mangrove Risk: By 2100, up to 56% of global mangroves could be at high to severe risk.
    • Most Affected Region: Southeast Asia, with 52–78% of mangroves at risk.
    • Other Scenario Impact (SSP3-7.0): Even under less severe warming, 97–98% of protective mangroves in Southeast Asia could still face critical threats.
    • Environmental Concern: These losses would severely weaken coastal protection, biodiversity, and carbon storage.
    [UPSC 2020] Consider the following statements:

    1. Jet streams occur in the Northern Hemisphere only. 2. Only some cyclones develop an eye. 3. The temperature inside the eye of a cyclone is nearly 10°C lesser than that of the surroundings.

    Which of the statements given above is/are correct?

    Options: (a) 1 only (b) 2 and 3 only (c) 2 only* (d) 1 and 3 only

     

  • [pib] DoT introduces Financial Fraud Risk Indicator (FRI)

    Why in the News?

    In a major move to fight cyber fraud and financial crime, the Department of Telecommunications (DoT) has launched the Financial Fraud Risk Indicator (FRI) as a part of the Digital Intelligence Platform (DIP).

    Back2Basics: Digital Intelligence Platform (DIP)

    • DIP is developed by the Department of Telecommunications (DoT) as a secure, integrated platform for real-time intelligence sharing.
    • Stakeholders Involved: It connects Telecom Service Providers (TSPs), law enforcement agencies (LEAs), banks, financial institutions, social media platforms, and identity document issuers.
    • Functionality: The platform contains information on telecom resource misuse and supports case tracking and coordinated action.
    • Sanchar Saathi Integration: DIP acts as a backend system for citizen requests submitted through the Sanchar Saathi portal.
    • Access Control: DIP is available only to authorized stakeholders via secure connections and is NOT accessible to public.

    What is the Financial Fraud Risk Indicator (FRI)?

    • Purpose: FRI is a risk-based tool that flags mobile numbers as Medium, High, or Very High risk for financial fraud.
    • Data Sources: It pulls inputs from the National Cybercrime Reporting Portal (NCRP), DoT’s Chakshu Platform, and banking institutions.
    • Beneficiaries: Helps banks, NBFCs, and UPI service providers implement added security for high-risk numbers.
    • How It Works:
      • The Digital Intelligence Unit (DIU) shares a Mobile Number Revocation List (MNRL) with reasons like cybercrime, failed verification, or excess usage.
      • The tool performs multi-dimensional analysis and assigns a fraud risk level.
      • Risk status is shared in real-time via DIP, enabling early action before fraud occurs.

    Case Study: PhonePe’s use of FRI System

    • PhonePe was one of the first adopters of the FRI system.
    • It uses FRI to:
      • Block transactions linked to Very High-risk numbers.
      • Display alerts using the PhonePe Protect feature.
    • For Medium-risk numbers, PhonePe is working on showing proactive user warnings before transactions.
    • The tool has proven highly accurate in identifying numbers involved in cyber fraud.

     

    [UPSC 2021] Which one of the following effects of the creation of black money in India has been the main cause of worry to the Government of India?

    Options: (a) Diversion of resources to the purchase of real estate and investment in luxury housing (b) Investment in unproductive activities and purchase of precious stones, jewelry, gold, etc. (c) Large donations to political parties and the growth of regionalism (d) Loss of revenue to the State Exchequer due to tax evasion*

     

  • Stitch in time: on judiciary and Environment Ministry notifications

    Why in the News?

    Recently, the Supreme Court struck down two orders from the Environment Ministry that had allowed industries to operate even after breaking environmental rules.

    What did the Supreme Court strike down as illegal?

    • Notifications allowing industries to bypass prior environmental clearance: The Court struck down two Union Environment Ministry notifications that permitted industrial units to set up or expand operations without prior government approval, violating the core principle of the Environment Impact Assessment (EIA) Notification, 2006. Eg: Industries were allowed to operate or change manufacturing practices without the mandatory prior environmental clearance.
    • Regularisation of violations through executive orders without parliamentary approval: The notifications enabled projects violating environmental laws to seek regularisation by paying fines, issued through executive orders instead of amending the Environment Protection Act (EIA), 2006 via Parliament. Eg: The 2017 “one-time” window and 2021 standard operating procedure allowed violative industries to avoid penalties by applying for clearance retrospectively.

    Why did the Centre allow industries to bypass prior clearance?

    • One-time window for regularisation: In 2017, the Centre provided a “one-time” six-month window for industries without proper environmental clearances to apply retroactively.
    • Avoid disruption of economic activities: The Centre wanted to prevent the demolition of functioning plants that contribute to the economy and employment, as shutting them down abruptly could be disruptive.
    • Legal precedent for balanced approach: The government cited court rulings supporting a “balanced” approach in cases of violations, emphasizing regularisation over punitive action when feasible.
    • Heavy fines as deterrent: The 2021 standard operating procedure imposed heavy fines on violative projects applying for clearance, intending to discourage violations while still allowing formalisation.
    • Procedural challenges with previous attempts: Earlier attempts by the UPA government (2012-13) to regularise such projects were struck down by courts on procedural grounds, prompting the Centre to try executive orders as a workaround. Eg: The Jharkhand High Court and National Green Tribunal nullified prior regularisation efforts due to procedural flaws.

    Who is impacted by the Court’s verdict?

    • Industries regularised under 2017 and 2021 orders remain unaffected: Companies that used the one-time window or the standard operating procedure to regularise violations before the verdict will not face penalties due to the Court’s ruling.
    • Future industrial projects must strictly follow prior clearance: The verdict reaffirms that all new or expanding projects must obtain mandatory prior environmental clearance, impacting industries planning to start or modify operations.
    • Regional environmental boards are under scrutiny: The ruling highlights the failure of local enforcement agencies to prevent illegal operations, signaling the need for better monitoring and compliance at the regional level. Eg: State pollution control boards will face greater pressure to enforce environmental laws rigorously.

    Way forward: 

    • Strengthen enforcement: Empower and equip regional pollution control boards to rigorously monitor and ensure strict compliance with environmental clearance norms.
    • Streamline clearance process: Simplify and expedite the prior environmental clearance procedure to balance industrial growth with environmental protection, reducing incentives for violations.

    Mains PYQ:

    [UPSC 2023] The most significant achievement of modern law in India in the constitutionalization of environmental problems by the Supreme Court. Discuss this statement with the help of relevant case laws.

    Linkage: The “constitutionalization of environmental problems by the Supreme Court,” which refers to how the judiciary, through interpretation (often linking environmental protection to fundamental rights like the Right to Life under Article 21), has played a significant role in shaping environmental law and policy in India.

  • Hoyle–Narlikar Theory of Gravity

    Why in the News?

    Jayant Narlikar, renowned Indian astrophysicist and Padma Vibhushan awardee, who co-developed the Hoyle–Narlikar Theory to refine Einstein’s Theory of Relativity, passed away in Pune at the age of 87.

    About Jayant Narlikar and His Contributions:

    • Early Life: Born in 1938 in Kolhapur, Maharashtra, and pursued a PhD at Cambridge University under Fred Hoyle.
    • Scientific Influence: Hoyle had earlier developed the steady-state theory with Bondi and Gold and coined the term “Big Bang” sarcastically in 1948.
    • Narlikar’s Belief: He argued that the universe always looks the same, as new matter fills the gaps created by expansion.
    • Critique of Big Bang: He believed the Big Bang theory includes unproven assumptions, especially about the sudden origin of all matter and energy.
    • Enduring Work: Despite steady-state theory’s decline, Narlikar’s contributions remain respected for their scientific depth and originality.

    What Is the Hoyle–Narlikar Theory?

    Fred Hoyle and Jayant Narlikar developed a theory to answer one of the most basic questions: Why do things have mass, and how are they connected to the rest of the universe?

    • Based on Mach’s Principle: They believed your mass isn’t just something you have on your own. Instead, it depends on your connection to everything else in the universe. That means even faraway stars and galaxies play a role in what you weigh.
    • Inertia Explained: In simple terms, when you feel resistance while trying to move (inertia), it’s because of the gravitational pull of all the matter in the universe acting on you at once.
    • Mass is Relative: Earth, the Sun, or even you don’t have a fixed mass. That mass is influenced by everything else that exists out there, no matter how far away it is.
    • C-field and Steady-State Model
      • New Idea – C-Field: They introduced the “creation field”, which creates new matter in space.
      • Universe Without a Start: Their steady-state theory says the universe has no beginning or end, is always expanding, and keeps its density constant.
      • Against the Big Bang: They believed the Big Bang couldn’t explain everything we see today.
      • Hydrogen Creation: They said hydrogen atoms form in space to fill in the gaps as the universe grows.
    • Issues with the Theory:
      • CMB Discovery (1965): Scientists found cosmic microwave background radiation, strong proof of the Big Bang.
      • Other Evidence: Later discoveries like young, chaotic galaxies and studies by Hawking and Penrose supported the Big Bang.
      • Current View: The Big Bang theory became more accepted, but Hoyle and Narlikar’s ideas are still respected for their scientific value.
    [UPSC 2018] Consider the following phenomena:

    1. Light is affected by gravity.

    2. The Universe is constantly expanding.

    3. Matter warps its surrounding space-time.

    Which of the above is/are the prediction/predictions of Albert Einstein’s General Theory of Relativity, often discussed in media?

    Options: (a) 1 and 2 only (b) 3 only (c) 1 and 3 only (d) 1, 2 and 3*

     

  • RBI revises rules for investment in Alternative Investment Funds (AIFs)

    Why in the News?

    The RBI has released revised draft guidelines for investments made by Regulated Entities (REs) in Alternative Investment Funds (AIFs) to ensure better regulatory oversight, prevent misuse of funds, and align with the rules already set by SEBI.

    What are Alternative Investment Funds (AIFs)?

    • Definition: They are unique investment vehicles that are privately pooled and invested in alternative asset classes such as venture capital, private equity, hedge funds, commodities, real estate, and derivatives.
    • Regulation: They are governed by SEBI under the SEBI (Alternative Investment Funds) Regulations, 2012.
    • Working: It can be formed as a trust, company, Limited Liability Partnership (LLP), or any other SEBI-permitted structure.
    • Legal Structure: They can be set up as trusts, companies, Limited Liability Partnership (LLP), or other legally permitted forms.
    • Investor Base:
      • AIFs are meant for High Net-Worth Individuals (HNIs) and institutional investors, NOT small retail investors.
      • Resident Indians, NRIs, and foreign nationals can invest.
    • Minimum Investment Requirement:
      • The minimum investment size is â‚č1 crore (SEBI, May 2024), except for accredited investors as defined by SEBI.
      • For employees or directors of the AIF or its manager, the minimum investment is â‚č25 lakh.
      • An AIF must have a minimum corpus of â‚č20 crore (â‚č10 crore for Angel Funds).

    Types of AIFs: 

    1. Category I: These funds invest in early-stage unlisted companies in the form of equity or debt (venture capital). These alternative asset funds can also invest in infrastructure-based projects or social ventures.
    2. Category II: These types of funds invest in equity or debt of unlisted companies that are in the mid or late stage of growth and are known as private equity or pre-IPO, respectively.
    3. Category III: This category of funds invests in the shares of listed companies. These alternative strategy funds can be for any period, long only or a combination of long and short.
    [UPSC 2014] What does Venture Capital mean?

    Options: (a) A short-term capital provided to industries. (b) A long-term start-up capital provided to new entrepreneurs* (c) Funds provided to industries at times of incurring losses. (d) Funds provided for replacement and renovation of industries.

     

  • Potato Cultivation in India

    Why in the News?

    India is likely to become the world’s largest potato producer, overtaking China, by 2050, according to experts from the International Potato Center (CIP) based in Peru.

    Back2Basics: International Potato Center (CIP)

    • The CIP is a research-for-development organisation founded in 1971, focused on improving potato, sweet potato, and Andean root and tuber crops.
    • Headquartered in Lima, Peru, CIP operates in over 20 countries across Africa, Asia, and Latin America.
    • It maintains the world’s largest Potato Gene Bank, safeguarding biodiversity for future use in research and breeding.

    Potato Cultivation in India:

    • About: Potato (Solanum tuberosum) is known as the “King of Vegetables” and is India’s fourth most important food crop after rice, wheat, and maize.
    • Origin: Introduced to India by Portuguese traders in the 17th century.
    • Geographic Spread: Grown in 23 states, but 85% of production comes from the Indo-Gangetic plains in North India.
    • Top Producing States:
      • Uttar Pradesh: ~30% of total output
      • West Bengal: ~23.5%
      • Bihar: ~17%
      • Other contributors: Punjab, Gujarat, Madhya Pradesh
    • Climate Needs: Potato is a cool-season crop.
      • Ideal growth temp: 24°C
      • Ideal tuber formation temp: 20°C
    • Soil Requirements: Prefers well-drained, fertile soils with moisture retention.
    • Planting Seasons:
      • Himachal Pradesh, Uttarakhand: Spring (Jan–Feb), Summer (May)
      • Punjab, Haryana, UP, Bihar, Bengal: Main crop in October
      • MP, Maharashtra, Karnataka: Both kharif and rabi seasons
    • Seed Management: Use disease-free, sprouted seeds (30–50g);
    • Popular varieties: Kufri Jyoti, Kufri Bahar, Kufri Pukhraj, and Kufri Chandramukhi.
    • Fertilization & Irrigation: Apply balanced nutrients, especially phosphorus and potassium; drip irrigation is recommended.
    • Harvesting: Ready in 90–120 days, harvested manually or mechanically.

    Global Comparison and Future Outlook:

    • Global Rank: India is the second-largest producer after China.
    • Production Volume: Over 50 million tonnes/year currently; projected to reach 100 million tonnes by 2050 (CIP experts).
    • Growth Drivers: Expansion is due to large cultivation area, strong domestic demand, and government support.
    • Tuber Crop Potential: Promoting crops like sweet potato can improve nutrition, livelihoods, and climate resilience.

    Policy measure for Potato Farmers: Operation Greens

    • It is a scheme launched by the GoI in 2018, modelled after Operation Flood, with the aim to stabilize the supply and prices of Tomato, Onion, and Potato (TOP) crops.
    • The scheme is implemented by the Ministry of Food Processing Industries (MoFPI) and was initially allocated a budget of â‚č500 crore.
    • Objectives:
      • Stabilize the supply and prices of potatoes (along with tomato and onion) to protect both farmers and consumers from extreme price fluctuations.
      • Reduce post-harvest losses of potatoes by improving storage, processing, and logistics infrastructure

     

    [UPSC 2014] In India, cluster bean (Guar) is traditionally used as a vegetable or animal feed, but recently the cultivation of this has assumed significance.

    Which one of the following statements is correct in this context?

    Options: (a) The oil extracted from seeds is used in the manufacture of biodegradable plastics. (b) The gum made from its seeds is used in the extraction of shale gas.* (c) The leaf extract of this plant has the properties of antihistamines. (d) It is a source of high quality biodiesel.

     

  • [pib] What is Operation Olivia?

    Why in the News?

    As of February 2025, the Indian Coast Guard (ICG) protected a record 6.98 lakh Olive Ridley turtles during their mass nesting at the Rushikulya river mouth in Odisha.

    About Operation Olivia:

    • Launch: Operation Olivia is an annual conservation mission by the Indian Coast Guard, started in the early 1980s.
    • Main Objective: It aims to protect Olive Ridley turtles during their nesting season, from November to May.
    • Primary Locations: The operation focuses on Odisha’s coast, especially Gahirmatha Beach, Devi River mouth, and Rushikulya River mouth.
    • Turtle Nesting Scale: Over 8 lakh turtles arrive annually at these sites to nest.
    • Surveillance Efforts: The Coast Guard has conducted more than 5,387 surface patrols and 1,768 aerial missions.
    • Community Engagement: Fishermen are encouraged to use Turtle Excluder Devices (TEDs) that allow turtles to escape fishing nets.

    About Olive Ridley Turtles:

    • Appearance: Named for their olive-green shell, or carapace.
    • Diet: They are Omnivores, though feeding mainly on jellyfish, crustaceans, and molluscs.
    • Nesting Behaviour: Known for Arribada, a phenomenon where thousands of females come ashore simultaneously to lay eggs.
    • Habitat Range: Found in warm waters of the Pacific, Atlantic, and Indian Oceans.
    • Major Nesting Sites in India:
      • Gahirmatha Marine Sanctuary, Odisha (largest site)
      • Devi River mouth (discovered in 1981)
      • Rushikulya River mouth (discovered in 1994)
    • Protection Status:
      • IUCN Red List: Listed as Vulnerable.
      • CITES: Included in Appendix I, banning international trade.
      • Wildlife Protection Act, 1972: Listed under Schedule I, offering the highest legal protection in India.
    [UPSC 2002] The sea coast of which one of the following states has become famous as a nesting place for the giant Olive Ridley turtles from South America?

    Options: (a) Goa (b) Gujarat (c) Odisha* (d) Tamil Nadu

     

  • NASA’s GRAIL Mission

    Why in the News?

    Scientists now believe the Moon’s near side looks different from its far side due to its internal structure and volcanic past, revealed by NASA’s Gravity Recovery and Interior Laboratory (GRAIL) mission.

    About the GRAIL Mission:

    • Launch: NASA launched the GRAIL mission in 2011 to study the moon’s internal structure.
    • Spacecraft Used: It used two spacecraft, Ebb and Flow, flying in tandem to detect gravity variations.
    • Objectives: The mission measured tiny changes in distance between the two spacecraft caused by differences in the moon’s gravitational field.
    • Scientific Outcome: The data revealed important details about the moon’s crust thickness, interior composition, and subsurface features.

    Key Findings: Reasons for the Moon’s Asymmetry

    • Tidal Deformation: The nearside bends more than the farside due to Earth’s gravity, a process called tidal deformation.
    • Internal Activity: The nearside is geologically warmer and more active, suggesting internal structural differences.
    • Volcanic History: Ancient volcanic activity on the nearside formed large basaltic plains, while the farside remained rugged and less active.
    • Heat Distribution: Elements like thorium and titanium accumulated on the nearside, making it 100–200°C hotter than the farside.
    • Crust Thickness: The nearside has a thinner crust, allowing magma to escape, while the farside’s thicker crust trapped heat and blocked eruptions.
    • Thermal Contrast: The thinner crust also allowed more heat-producing elements to concentrate, increasing the temperature gap between the two sides.

    Why do these findings matter?

    • Support for Lunar Missions: Insights from GRAIL help design better navigation and timing systems for future lunar operations.
    • Applications: GRAIL’s method can be applied to other moons like Enceladus and Ganymede, which may hold potential for life.
    [UPSC 2007] NASA’S Deep Impact space mission was employed to take detailed pictures of which comet nucleus?

    Options: (a)  Halley’s Comet (b) Hale-Bopp (c) Hyakutake (d) Tempel 1 *

     

  • Mahadayi Water Dispute

    Why in the News?

    A protest has erupted in Goa after a scientific paper on water availability and diversion in the Mahadayi basin reignited its long-standing dispute with Karnataka.

    Mahadayi Water Dispute

    About the Mahadayi River:

    • Origin: The Mahadayi River (Mhadei in Goa) originates in Bhimgad, Karnataka, in the Western Ghats.
    • Length and Flow: It flows 81 km, passing through Karnataka (35 km), Goa (45 km), and Maharashtra (1 km) before reaching the Arabian Sea.
    • Basin Area: Covers 2,032 sq km—78% in Goa, 18% in Karnataka, and 4% in Maharashtra.
    • Significance: Forms the Mandovi River, essential for drinking water, agriculture, and navigation in Goa.
    • Tributaries: Kalasa Nala, Surla Nala, Haltar Nala, Poti Nala, Mahadayi Nala, Pansheer Nala, Bail Nala, Andher Nala and many more. It has a catchment area of 2032 sq.km.
    • Topography: Elevation ranges between < 0m and > 980m w.r.t Mean Sea Level, slope of the catchment varies up to 150%. Very high slope we observed in the Ghats (Braganja Ghats).
    • Waterfalls: Variations in the terrain has led to formation of various water falls such as the Doodhsagar falls,Vajra poha falls etc.
    • Ecology: Supports rich biodiversity, including the Salim Ali Bird Sanctuary.
    • Mineral Ores found: Iron, limestone, bauxite, quartz, limestone, sand, clay, lime shell, Manganese, Asbestos, Mica, Lead, Cadmium.

    Mahadayi Water Dispute:

    • Karnataka’s Project: Proposed the Kalasa-Banduri Nala to divert water to the Malaprabha basin.
    • Tribunal Setup: The Mahadayi Water Disputes Tribunal (2010) addressed disagreements.
    • 2018 Verdict:
      • Karnataka: 13.42 tmcft (1.72 from Kalasa, 2.18 from Bhandura).
      • Goa: 24 tmcft (plus 9.395 tmcft for existing use).
      • Maharashtra: 1.33 tmcft.
    • Concerns: Goa feared impacts on Mandovi navigation; the tribunal cited tidal flow ensures stability.
    • Legal Status: Both states have challenged the verdict in the Supreme Court.

    Controversy Over CSIR-NIO Report:

    • Study Findings: Claimed Karnataka’s diversions would have minimal impact on Goa’s water or estuarine navigation.
    • Institutions: Report authored by CSIR-NIO (Goa) and INCOIS (Hyderabad).
    • Recommendations: Suggested check dams and a Tillari-style agreement for shared water use and ecological balance.

    Tap to read more about Interstate Water Disputes in India.

    [UPSC 2013] Constitutional mechanisms to resolve the inter-state water disputes have failed to address and solve the problems. Is the failure due to structural or process inadequacy or both? Discuss.