💥Join UPSC 2027,2028 Mentorship (July Batch) + XFactor Notes & Microthemes PDF
Talk to Mentor

Civilsdaily

Login

Subject: Geography

  • Massive Earthquake hits Myanmar and Thailand

    Why in the News?

    A powerful 7.7 magnitude earthquake struck Myanmar, with its epicentre near Mandalay, the country’s second-largest city.

    Massive Earthquake hits Myanmar and Thailand

    What caused the Earthquake in Myanmar?

    • Myanmar is situated between the Indian Plate and the Eurasian Plate, which makes the region seismically active.
      • The Sagaing Fault, running from north to south through Myanmar, marks the boundary of these plates.
      • It is an active fault line that has caused significant earthquakes in the past, including a 7.9 magnitude earthquake in 1912 and a 6.9 magnitude earthquake in 2016.
    • The Indian Plate was moving northward along the Sagaing Fault relative to the Eurasian Plate. The friction and stress built up along this fault led to a sudden release of energy, resulting in the earthquake.
    • The earthquake’s epicentres was located 17.2 km from Mandalay, Myanmar’s second-largest city, at a depth of just 10 km.

    Why are Shallow Earthquakes more destructive?

    • Proximity to the Surface: Shallow earthquakes (less than 70 km deep) cause intense shaking. For example, the Myanmar earthquake occurred at 10 km, leading to rapid, forceful seismic waves and extensive damage.
    • Energy Release: Shallow earthquakes retain more energy in seismic waves, causing stronger surface shaking and greater destruction.
    • Higher Intensity: Shallow quakes produce higher intensity shaking, resulting in more structural damage compared to deeper quakes, where seismic waves lose energy.
    • Aftershocks: Shallow earthquakes often lead to more intense aftershocks, further damaging already weakened structures. The Myanmar earthquake had aftershocks, including one with magnitude 6.4.

    Back2Basics: Earthquake and Related Terminologies

    • Earthquake is a sudden shaking of the ground caused by energy release from tectonic plate movements or volcanic activity, generating seismic waves.
    • Key Terminologies:
      • Focus (Hypocenter): The point inside the Earth where the earthquake originates, deep beneath the surface.
      • Epicenter: The point on the Earth’s surface directly above the focus, usually the most affected area.
      • Seismic Waves: Waves that carry the energy released during an earthquake and cause ground shaking.
      • Fault: A crack or fracture in the Earth’s crust where movement occurs, often causing earthquakes.
      • Magnitude: A measure of the earthquake’s size or energy, commonly measured on the Richter scale.
      • Intensity: The strength of shaking at specific locations, measured by the Modified Mercalli Intensity (MMI) scale.

    Types of Earthquake Waves:

    • Body Waves: Travel through the Earth’s interior, detected first by seismographs.
      • Primary Waves (P-Waves): Fastest, compression waves that move through solids and liquids.
      • Secondary Waves (S-Waves): Shear waves, slower than P-waves, that move through solids only.
    • Surface Waves: Travel along the Earth’s surface, slower but cause more damage.
      • Love Waves: Move side-to-side horizontally, causing significant damage.
      • Rayleigh Waves: Cause elliptical ground motion, similar to ocean waves, very destructive.

     

    [UPSC 2021] Consider the following statements:

    1. In a seismograph, P waves are recorded earlier than S waves.

    2. In P waves, the individual particles vibrate to and fro in the direction of waves propagation whereas in S waves, the particles vibrate up and down at right angles to the direction of wave propagation.

    Which of the statements given above is/are correct?

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

     

  • 50 Years of Farakka Barrage

    Why in the News?

    It was nearly 50 years ago, that India had completed the construction of the Farakka Barrage.

    About Farakka Barrage

    • The Farakka Barrage is located on the Ganges River in Murshidabad District, West Bengal, India, about 18 km from the Bangladesh border.
    • The barrage measures 2,304 meters (7,559 feet) in length.
    • Its construction began in 1962 and was completed in 1970 at a cost of 1 billion dollars. It became operational on April 21, 1975.
    • The Feeder Canal is approximately 42 km long, connecting the barrage to the Hooghly River.
    • Purpose:
      • It diverts water to the Hooghly River to maintain the navigability of Kolkata Port and to flush out sediment from the river.
      • It diverts 1,800 cubic meters per second of water from the Ganges.
    • Construction Details:
      • Built by Hindustan Construction Company, it consists of 109 gates, with 108 over the river and one over low-lying land as a precaution.
      • Supports the Farakka Super Thermal Power Station.
    • The 1996 Ganges Water Sharing Treaty ensured fair water distribution:
      • 70,000 cusecs or less: 50% to both India and Bangladesh.
      • 70,000 – 75,000 cusecs: India gets 35,000 cusecs, Bangladesh the balance.
      • 75,000 cusecs or more: India receives 40,000 cusecs, Bangladesh gets the remainder.

    Significance in India-Bangladesh Water Sharing:

    • The Farakka Barrage is crucial for irrigation in West Bengal, supporting agriculture during the dry season.
    • Bangladesh, particularly Mongla and Khulna, depends on the Ganges for water.
    • The diverted water has led to water scarcity, impacting agriculture, fisheries, and livelihoods in Bangladesh, causing diplomatic tensions.
    • This treaty ensures equitable distribution and guarantees a minimum flow for Bangladesh.
    • Issues: 
      • Water diversion has led to salinization and soil degradation in Bangladesh, affecting agriculture and freshwater supplies.
      • Biodiversity loss and damage to the Sundarbans mangrove forests have been significant environmental impacts.
    [UPSC 1997] The canal-carrying capacity of Farakka is:

    (a) 40,000 cusecs (b) 60,000 cusecs (c) 80,000 cusecs (d) 100,000 cusecs

     

  • Himalayan tragedy: On avalanches in the Himalayan States

    Why in the News?

    Earlier this week, the Indian Army and Indo-Tibetan Border Police rescued 23 workers trapped under snow and ice after an avalanche in Mana village, Uttarakhand.

    What were the key challenges faced by the rescue teams during the avalanche operation in Mana Village?

    • Harsh Weather Conditions: The rescue teams operated under heavy snowfall and extreme cold at an elevation of 10,500 feet above mean sea level.
    • Blocked Access Routes: Snow-blocked roads required the use of helicopters for evacuation, complicating logistics and delaying rescue efforts.
    • Physical Exhaustion: Rescuers worked in near-continuous 60-hour shifts, demanding immense physical and mental stamina.
    • Buried Structures: Containers housing workers were buried under several feet of snow, ice, and rock, making detection and extraction challenging.
    • Limited Visibility and Navigation: Poor weather conditions hindered visibility, requiring the use of advanced technology like drone-based detection systems.

    Why is Mana village particularly vulnerable to avalanches and other natural disasters?

    • High-Altitude Location: Situated at 10,500 feet above sea level in the upper Himalayas, the village experiences heavy snowfall and extreme weather, increasing the risk of avalanches. Example: The recent avalanche buried containers under several feet of snow, making rescue operations challenging.
    • Geological Instability: The Himalayan region is tectonically active, making the terrain prone to landslides, avalanches, and other natural hazards. Example: Frequent landslides during the monsoon season disrupt roads and infrastructure in Uttarakhand.
    • Seasonal Climate Extremes: Harsh winters with severe snow accumulation create unstable snowpacks that can trigger avalanches. Example: Villagers traditionally migrate to lower areas like Gopeshwar during winter to avoid extreme weather risks.
    • Construction and Human Activity: Ongoing infrastructure projects, such as road-building by the Border Roads Organisation (BRO), disturb the fragile environment and increase disaster risks. Example: Workers were caught in an avalanche while working on a BRO construction site.
    • Proximity to Glacial Zones: Close to glacial areas where melting ice and shifting snowpacks heighten the probability of snow slides. Example: Melting glaciers in the region have previously triggered flash floods, like the 2021 Chamoli disaster.

    What lessons can be learned from other hazardous environments? 

    • Enhanced Shelter Design for Safety: Use reinforced, insulated shelters designed to withstand extreme weather and heavy snow loads, similar to Antarctic research stations. Example: Antarctic research bases like the Amundsen-Scott Station use elevated, modular designs to prevent snow burial and provide long-term safety.
    • Advanced Early Warning Systems: Implement real-time monitoring using satellite imaging, drones, and weather forecasting to detect potential avalanches and other hazards. Example: Switzerland’s avalanche warning system uses advanced sensors and weather models to alert communities and workers in mountainous areas.
    • Comprehensive Safety Protocols and Training: Provide specialized safety training, emergency drills, and evacuation plans to workers in high-risk zones. Example: Oil platforms in the Arctic conduct regular safety drills and have rapid-response systems for extreme weather emergencies.

    How could better infrastructure and safety measures reduce the risks faced by workers in high-altitude, disaster-prone areas? (Way forward)

    • Improved Worker Shelters and Living Conditions: Construct insulated, avalanche-resistant shelters with emergency exits and heating systems to protect workers from harsh weather. Example: The Siachen Glacier military base uses reinforced prefabricated shelters designed to withstand extreme snow and sub-zero temperatures.
    • Deployment of Real-Time Monitoring and Early Warning Systems: Use geospatial technology, drones, and automated weather stations to track snow accumulation and predict avalanches. Example: Japan’s snow monitoring system uses remote sensors to provide early warnings, reducing avalanche risks in mountainous areas.
    • Enhanced Emergency Response Infrastructure: Establish permanent rescue facilities with specialized equipment (e.g., thermal detectors and rapid evacuation routes) for quicker disaster response. Example: The Alps region in Europe maintains well-equipped avalanche rescue stations, ensuring faster response times and reducing casualties.

    Mains PYQ:

    Q Differentiate the causes of landslides in the Himalayan region and Western Ghats. (UPSC IAS/2021)

  • Delhi Earthquake

    Why in the News?

    A magnitude 4 earthquake struck New Delhi with epicentre near Dhaula Kuan. The quake was shallow (5 km depth), highlighting Delhi’s seismic vulnerability due to its location in Zone IV of India’s earthquake hazard map.

    Possible Causes of the Earthquake

    • Tectonic Activity along the Delhi-Hardwar Ridge:
      • Delhi sits on the Delhi-Hardwar Ridge, an active seismic fault.
      • Continuous collision of the Indian and Eurasian plates builds tectonic stress, leading to earthquakes when stress is released.
    • Groundwater Extraction as a Seismic Trigger: Excessive exploitation alters rock pressure, potentially inducing fault movements.
    • Anthropogenic (Human-Induced) Activity:
      • Urbanization, metro construction, and large-scale infrastructure projects alter subsurface stress.
      • Vibrations from construction activities can contribute to localized seismic instability.

    About the Aravalli-Delhi Fold Belt

    • The Aravalli-Delhi Fold Belt is a major geological formation that extends from southern Rajasthan to Haryana and Delhi.
      • It consists of ancient folded rock formations that have undergone millions of years of geological transformation.
    • This region has several pre-existing faults, meaning seismic activity can occur without direct tectonic subduction.
    • Although historically more active, tectonic movements in the belt have slowed over time.
    • These earthquakes occur due to fault reactivation and local stress accumulation rather than large-scale tectonic shifts.
      • Himalayan earthquakes are caused by subduction, where the Indian plate moves under the Eurasian plate.

    PYQ:

    [2021] Discuss about the vulnerability of India to earthquake related hazards. Give examples including the salient features of major disasters caused by earthquakes in different parts of India during the last three decades.

    [2015] The frequency of earthquakes appears to have increased in the Indian subcontinent. However, India’s preparedness for mitigating their impact has significant gaps. Discuss various aspects.

     

  • [13th February 2025] The Hindu Op-ed: Nuclear energy — dangerous concessions on liability

    PYQ Relevance:

    Q) Give an account of the growth and development of nuclear science and technology in India. What is the advantage of a fast breeder reactor programme in India? (UPSC CSE 2017)

     

    Mentor’s Comment: UPSC mains have always focused on nuclear science and technology (2017), and atomic energy (2013).

    In the Union Budget speech on February 1, Finance Minister Nirmala Sitharaman announced plans to amend the Atomic Energy Act and the Civil Liability for Nuclear Damage (CLND) Act. This move is likely to be welcomed by the U.S., where past governments have opposed India’s law because it holds nuclear manufacturers partly responsible for accidents. However, in India, removing supplier liability could be a major concern, as it might weaken nuclear safety measures.

     

    Today’s editorial talks about the Atomic Energy Act and the Civil Liability for Nuclear Damage (CLND) Act. This content will help in GS papers 2 and 3 in mains answer writing.

    _

    Let’s learn!

    Why in the News?

    The mention of plans to amend the Civil Liability for Nuclear Damage Act in the Union Budget is a serious issue that needs attention.

    What is the Atomic Energy Act?

    • The Atomic Energy Act, 1962 is an Indian law that regulates the development, production, and use of nuclear energy for peaceful purposes while ensuring national security. It gives the government exclusive control over nuclear materials, plants, and research and allows the establishment of nuclear power projects. The Act also covers radiation safety, uranium mining, reactor operations, and waste disposal to prevent misuse and ensure public safety.

    What is the Civil Liability for Nuclear Damage Act? 

    • The Civil Liability for Nuclear Damage (CLND) Act, 2010 is an Indian law that defines liability in case of a nuclear accident. It ensures compensation for victims while holding nuclear plant operators accountable.

    Key Features:

    • Operator Liability: The primary financial responsibility for any nuclear accident rests with the plant operator (NPCIL in India), not the supplier.
    • Right of Recourse: Unlike many other countries, India allows operators to seek compensation from suppliers if defective equipment or services cause an accident (Section 17).
    • Liability Cap: Operator liability is capped at ₹1,500 crore (~$180 million), with the government covering additional costs if needed.
    • Exclusion from Global Regimes: India has not joined international nuclear liability agreements like the Convention on Supplementary Compensation (CSC), meaning financial responsibility remains domestic.

    What are the safety and liability concerns related to nuclear energy?

    • Risk of Catastrophic Accidents: Nuclear plant failures can lead to massive radiation leaks, environmental destruction, and long-term health impacts.Example: The Fukushima Daiichi disaster (2011, Japan) resulted from a tsunami, causing multiple reactor meltdowns and widespread radioactive contamination.
    • Design Flaws and Negligence: Suppliers may overlook or downplay safety risks in reactor designs, leading to vulnerabilities. Example: The Three Mile Island accident (1979, USA) occurred due to a known reactor design flaw that the supplier failed to address.
    • Limited Liability for Suppliers: In many countries, nuclear suppliers are indemnified, placing financial liability entirely on plant operators and governments.Example: General Electric (GE), which designed the Fukushima reactors, faced no financial consequences due to Japan’s liability laws.
    • Insufficient Compensation for Victims: Liability caps limit compensation for victims, despite the high costs of nuclear disasters. Example: India’s Civil Liability for Nuclear Damage (CLND) Act caps liability at ₹1,500 crore, whereas Fukushima’s cleanup costs are estimated at ₹20-46 lakh crore.
    • Radioactive Waste and Long-Term Risks: Safe disposal of nuclear waste remains a major challenge, with risks of leaks and contamination lasting thousands of years.Example: The Chernobyl disaster (1986, USSR) left a radioactive exclusion zone that remains uninhabitable nearly 40 years later.

    How does India’s approach to nuclear liability differ from global standards?

    • Operator Liability with Limited Supplier Responsibility: India’s Civil Liability for Nuclear Damage (CLND) Act, 2010, places primary liability on the operator (NPCIL), but allows it to seek compensation from suppliers in case of defective equipment or services (Right of Recourse, Section 17).
      • Global Standard: Most countries fully indemnify suppliers, meaning they bear no financial responsibility after supplying reactors.
      • Example: In Japan, General Electric (GE) faced no liability for the Fukushima disaster (2011), while in India, foreign suppliers fear financial risks if an accident occurs.
    • Liability Cap vs. Unlimited Liability in Some Countries: India caps operator liability at ₹1,500 crore (~$180 million), with additional compensation coming from the government if needed.
      • Global Standard: Some countries, like Germany, impose unlimited liability on operators to ensure full compensation. The U.S. Price-Anderson Act establishes a large industry-backed fund for damages beyond a certain limit.
      • Example: After the Chernobyl disaster (1986, USSR), the Soviet government bore the entire cost (~$235 billion), whereas an Indian accident beyond ₹1,500 crore would shift the financial burden to taxpayers.
    • India is Not Part of Global Nuclear Liability Regimes: India has not signed the Convention on Supplementary Compensation for Nuclear Damage (CSC), which standardizes liability norms and creates an international compensation pool.
      • Global Standard: Most nuclear-powered nations, including the U.S. and Japan, are CSC members, ensuring global financial support for nuclear accidents.
      • Example: If a nuclear accident occurs in France, CSC members contribute to compensation, but in India, all financial burdens remain domestic.

    What are the reasons behind the government’s plan to amend the Atomic Energy Act and the Civil Liability for Nuclear Damage (CLND) Act?

    • Attracting Foreign Investment and Suppliers – The existing CLND Act allows India’s nuclear operator (NPCIL) to seek compensation from foreign suppliers in case of faulty equipment, discouraging companies from supplying reactors. Amendments could limit supplier liability, making India a more attractive market for nuclear investments from countries like the U.S., France, and Russia.
    • Expanding Nuclear Energy Capacity – India aims to increase its nuclear power generation to meet rising energy demands and climate goals. Simplifying liability laws could accelerate agreements with international partners and facilitate the construction of new nuclear plants under deals such as the India-U.S. Civil Nuclear Agreement.

    What are the other implications of increasing nuclear energy reliance?

    • High Economic Costs and Project Delays: Nuclear power plants require massive upfront investments, long construction periods, and frequent cost overruns.
      • Example: The AP1000 reactors in Georgia, USA, were initially estimated at $14 billion but were completed at $36.8 billion—a 250% cost overrun. Similarly, India’s Kudankulam Nuclear Power Plant faced significant delays and cost escalations.
    • Nuclear Waste Management and Environmental Risks: Nuclear energy produces radioactive waste that remains hazardous for thousands of years, requiring secure disposal and long-term monitoring.
      • Example: The Fukushima disaster (2011) led to the release of radioactive material, contaminating land and water, with cleanup costs estimated between ¥35-80 trillion (~₹20-46 lakh crore). India lacks permanent storage facilities for high-level nuclear waste.
    • Geopolitical and Security Concerns: Expanding nuclear energy means higher dependence on foreign suppliers, leading to strategic vulnerabilities and potential external influence.
      • Example: India’s civil nuclear deal with the U.S. (2008) opened doors for technology transfer, but suppliers now demand liability protection before delivering reactors, creating diplomatic pressure.

    Way forward:

    • Strengthen Liability and Safety Frameworks: The government should Amend the Civil Liability for Nuclear Damage (CLND) Act to ensure fair risk-sharing between operators and suppliers.
      • Need to invest in advanced reactor safety technologies (e.g., Small Modular Reactors – SMRs) and strengthen independent regulatory oversight.
    • Develop Robust Waste Management and Indigenous Capabilities: The government should establish permanent disposal sites for high-level nuclear waste with stringent monitoring.
      • Need to enhance domestic nuclear technology (e.g., Thorium-based reactors) to reduce reliance on foreign suppliers and improve energy security.

  • In news: Darien Gap

    Why in the News?

    The illegal journey into the US often involves dangerous crossings through multiple countries, including the treacherous Darien Gap – a vast, roadless jungle that connects Colombia and Panama.

    In news: Darien Gap

    What is the Darien Gap?

    • The Darien Gap is a 97-km stretch of dense rainforest, swamps, and mountains that forms the only break in the Pan-American Highway, which otherwise runs from Alaska to Argentina.
    • Due to its extreme terrain, harsh climate, and lack of infrastructure, the region has remained largely impenetrable.
    • However, in recent years, it has become a major migration route, as thousands of people attempt to cross it in hopes of reaching North America.
    • Geographical Features:
      • Location: Forms the border between Panama and Colombia.
      • Terrain: Consists of steep mountains, muddy swamps, fast-flowing rivers, and dense rainforests, making travel extremely difficult.
      • Climate: Has a hot, humid, and rainy environment with limited access to food and water.

    Geo-Political Significance:

    • Migration Crisis: Over 520,000 migrants crossed in 2023, with over 300,000 crossings in early 2024.
    • ‘Donkey Route’: Many migrants, including Indians, Venezuelans, Haitians, and Pakistanis, travel through Central American nations like Panama, Costa Rica, and Guatemala before reaching Mexico.
    • Criminal Activity: The region is controlled by smuggling networks, drug cartels, and armed groups, who demand money, rob migrants, or subject them to violence.
    • Humanitarian Concerns: Reports of sexual assaults, deaths, and disappearances are increasing, with overcrowded shelters and severe shortages of food, water, and medical aid.

    PYQ:

    [2015] The area known as ‘Golan Heights’ sometimes appears in the news in the context of the events is related to:

    (a) Central Asia

    (b) Middle East

    (c) South-East Asia

    (d) Central Africa

  • Asteroid 2024 YR4

    Why in the News?

    NASA has identified a newly discovered near-Earth asteroid, 2024 YR4, which has a slightly more than 1% chance of impacting Earth in 2032.

    Asteroid 2024 YR4

    Asteroid 2024 YR4 and its Geographical Features:

    • The asteroid was discovered in December 2024 by an observatory in Chile.
    • It measures between 40 to 100 meters across, making it roughly the size of a football field.
      • The exact size is uncertain because astronomers estimate an asteroid’s size based on its brightness.
    • On December 25, 2024, the asteroid passed within 800,000 kilometers of Earth, which is approximately twice the distance of the Moon.
    • It will fade from sight in April 2025 and will not be visible again until 2028, when it approaches Earth once more.
    • The asteroid is currently rated 3 on the Torino Scale, which measures the risk of impact on a scale from 0 to 10.

    Potential Destruction from 2024 YR4 Impact:

    • If 2024 YR4 collides with Earth, it is expected to release between 8 to 10 megatons of energy, equivalent to multiple nuclear explosions.
    • It injured 1,500 people and damaged thousands of buildings across several cities.
    • In comparison, the Apophis asteroid, discovered in 2004, was initially rated 4 but was later downgraded after further observations ruled out an impact threat.

    How often do Asteroids crash Into Earth?

    • Thousands of small asteroids burn up in Earth’s atmosphere daily due to friction.
    • The Chelyabinsk meteor (2013) exploded over Russia with 30 times the power of the Hiroshima bomb.
    • Asteroids around 40 meters can cause regional destruction if they hit Earth.
    • Large asteroids (1 km+ in size) can trigger global disasters, occurring about once every 260 million years.
    • The Chicxulub asteroid (66 million years ago) led to the extinction of dinosaurs.

    How Space Agencies prevent Asteroid Collisions?

    • NASA and global space agencies work on planetary defense to prevent impacts.
    • In 2022, NASA’s DART mission successfully changed asteroid Dimorphos’s trajectory using kinetic impact.
    • Scientists explore 3 key methods for asteroid deflection:
      • Kinetic Impact:  Using spacecraft to hit an asteroid and alter its path.
      • Gravity Tractors:  Using a spacecraft’s gravity to pull an asteroid off course.
      • Nuclear Explosions: As a last resort, detonating a nuclear device near an asteroid to deflect or destroy it.

     

    PYQ:

    [2011] What is the difference between asteroids and comets?

    1. Asteroids are small rocky planetoids, while comets are formed of frozen gases held together by rocky and metallic material.
    2. Asteroids are found mostly between the orbits of Jupiter and Mars, while comets are found mostly between Venus and Mercury.
    3. Comets show a perceptible glowing tail, while asteroids do not.

    Which of the statements given above is/are correct?

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

  • In news: Palar River

    Why in the News?

    The British-era Palar River Anaicut, a masonry check dam built in 1858, is undergoing a major restoration following severe structural damage caused by the 2021 floods.

    Supreme Court’s Directives:

    • The Supreme Court (SC) has directed that all restoration activities must adhere to environmental protection laws and sustainable development principles.
    • The WRD must ensure that the restored structure can withstand future floods and water releases.
    • The SC emphasized local farmers’ involvement in decision-making, considering the impact on irrigation and water availability.

    In news: Palar River

    About Palar River

    • The Palar River originates in the Nandi Hills of Karnataka, at an altitude of 1,400 meters above sea level.
    • It flows through Karnataka, Andhra Pradesh, and Tamil Nadu, covering a total length of 348 km before emptying into the Bay of Bengal near Vayalur, Tamil Nadu.
    • Important tributaries include Cheyyar, Ponnai, Malattar, and Kosasthalaiyar rivers.
    • The river has been a lifeline for agriculture, supporting ancient civilizations and irrigation networks in South India.
    • Geographical Features: 
      • It is rain-fed, experiencing seasonal variations—it remains dry for most of the year but carries heavy flows during monsoons.
      • Its basin consists of alluvial, red, and black soil, supporting paddy, sugarcane, and groundnut cultivation.
      • It is heavily dammed, leading to reduced flow, sand mining concerns, and groundwater depletion.
      • The Palar Anaicut and various reservoirs distribute water to agricultural lands in Tamil Nadu, ensuring water security for farmers.

    PYQ:

    [2016] Recently, which of the following States has explored the possibility of constructing an artificial inland port to be connected to sea by a long navigational channel?

    (a) Andhra Pradesh

    (b) Chhattisgarh

    (c) Karnataka

    (d) Rajasthan

  • The science is clear, crowd disasters are preventable

    Why in the News?

    This week in India, a tragic crowd crush at the Maha Kumbh claimed the lives of 30 people.

    What scientific evidence supports the prevention of crowd disasters?

    • Crowd Density Studies: Research indicates that crowd crushes become dangerous at densities of five persons per square meter, with serious risks emerging at seven persons per square meter or more. This evidence underscores the need for effective crowd management to prevent dangerous overcrowding.
    • Predictability of Crowd Behavior: Scientific studies have shown that crowd dynamics can be predicted and managed. By understanding how crowds behave in different environments, planners can implement strategies to avoid conditions that lead to crushes.
    • Historical Data on Past Incidents: Analysis of previous crowd disasters reveals common factors leading to fatalities, such as inadequate space and poor crowd control measures. Lessons learned from these incidents can inform better practices for future events.

    How can effective crowd management practices be implemented at large events?

    • Strategic Planning: Event organizers should create a comprehensive plan that includes crowd flow evaluation, risk assessment, and clearly marked exits and entrances. This planning should involve local officials to ensure safety measures are adequate.
    • Staggered Entry and Exit Times: To reduce peak crowd density, organizers can stagger arrival and departure times for attendees, allowing for a more manageable flow of people into and out of the venue.
    • Use of Barriers: Implementing physical barriers can help segment crowds into smaller groups, reducing the likelihood of dangerous surges. Barriers should be designed to allow for emergency exits if needed.
    • Crowd Monitoring Systems: Utilizing technology for real-time monitoring of crowd density and behaviour can help event staff respond quickly to potential dangers. Mass notification systems can alert staff about growing concerns, enabling timely interventions.
    • Staff Training and Communication: Ensuring that all staff and security personnel are trained in crowd management techniques is essential. Clear communication protocols should be established to relay information quickly during an event.

    What role do policies and regulations play in enhancing crowd safety?

    • Mandatory Safety Regulations: Governments should introduce regulations requiring event organizers to adhere to safety standards that limit crowd density and ensure adequate emergency planning. Such policies can hold organizers accountable for crowd safety.
    • Economic Incentives for Compliance: While event organizers often prioritize profit over safety, regulations can create incentives for them to implement safer practices, such as limiting ticket sales based on venue capacity.
    • Post-Incident Reviews and Accountability: Establishing a framework for reviewing crowd disasters can lead to improved regulations and practices in the future. Accountability measures can encourage compliance with safety standards among event planners and local authorities.
    • Public Awareness Campaigns: Governments can promote awareness about crowd safety among the public, educating attendees on how to behave in crowded situations and the importance of following safety protocols during events.

    What are the steps taken by the government?

    • National Disaster Management Authority (NDMA) Guidelines: The NDMA has formulated guidelines to ensure safe crowd management during mass gatherings. These guidelines include regulating traffic, using barricades, and ensuring adequate police presence to manage crowds effectively.
    • Capacity Evaluation: Before hosting large events, there is a requirement for proper evaluation of the venue’s capacity. This ensures that the infrastructure can handle the expected crowd size without leading to dangerous overcrowding.
    • Use of Technology: The government encourages the deployment of advanced technologies such as CCTV surveillance, drones for aerial monitoring, and public address systems to enhance crowd management and safety.
    • Traffic Management: Effective traffic management strategies are implemented, including displaying route maps, managing unauthorized parking, and controlling pedestrian flow around event venues to prevent bottlenecks.

    Way forward: 

    • Strengthen Regulatory Framework – Governments should enforce stricter crowd safety regulations, mandating capacity limits, emergency preparedness, and real-time crowd monitoring for all large events.
    • Enhance Technological Integration – Deploy AI-based crowd analytics, drone surveillance, and real-time alert systems to monitor crowd density and movement. Training event staff in using these technologies will improve response times and prevent disasters.

    Mains PYQ:

    Q Discuss the recent measures initiated in disaster management by the Government of India departing from the earlier reactive approach. (UPSC IAS/2020)

    Q How important are vulnerability and risk assessment for pre-disaster management? As an administrator, what are key areas that you would focus on in a Disaster Management System? (UPSC IAS/ 2013)

  • Why meteorologists are comparing Storm Eowyn to a bomb?

    Why in the News?

    Storm Éowyn has hit the British Isles with very strong winds, especially in Ireland and Scotland.

    What are the meteorological characteristics of Storm Eowyn?

    • Explosive Cyclogenesis: Storm Éowyn qualifies as a “bomb cyclone,” with air pressure at its center dropping 50 millibars within 24 hours, significantly exceeding the 24-millibar threshold for explosive cyclogenesis. This rapid deepening is a hallmark of severe winter storms in the region.
    • Wind Speeds: The storm produced wind gusts exceeding 100 mph, with a record gust of 114 mph reported at Mace Head on Ireland’s west coast. The Met Office issued red warnings for widespread gusts of 80-90 mph, particularly affecting Northern Ireland and central and southern Scotland.
    • Jet Stream Influence: A strong jet stream, with winds exceeding 200 mph, played a crucial role in the storm’s development. The temperature contrast between cold air from the eastern US and warmer air over the North Atlantic contributed to this intensity.

    What impacts it had on affected regions and what are the expected consequences?

    • Power Outages and Damage: Nearly one million properties across the British Isles experienced power outages due to downed trees and damaged infrastructure. Restoration efforts are expected to take several days, with some areas potentially facing up to ten days without power.
    • Transport Disruptions: The storm caused significant disruptions to road and rail services, with many routes blocked or cancelled due to hazardous conditions. Emergency services have been deployed to manage the aftermath.
    • Casualties: Tragically, at least one fatality was reported in Ireland when a tree fell on a vehicle due to the high winds. The overall impact of the storm has raised concerns about safety and emergency preparedness in affected regions.

    How does Storm Eowyn fit into broader climate change trends and patterns of extreme weather events?

    • Climate Change Considerations: While Storm Éowyn’s intensity raises questions about climate change’s role in extreme weather events, current research has not conclusively linked specific storm intensities or frequencies to climate change.
      • The Intergovernmental Panel on Climate Change (IPCC) reports low confidence in observed trends related to extratropical storms over the last century.
    • Future Storm Patterns: There are indications that future winter storms may become more frequent and clustered, leading to increased overall impacts. Additionally, as global temperatures rise, storms may exhibit more extreme wind speeds and rainfall due to a warmer atmosphere’s capacity to hold more moisture.
    • Potential for Sting Jets: There is speculation that Storm Éowyn may have developed “sting jets,” which can produce localized but extremely destructive winds. While their occurrence is difficult to predict, studies suggest that such phenomena may increase with future cyclones as atmospheric conditions evolve.

    Way forward: 

    • Strengthening Infrastructure & Emergency Preparedness – Governments should invest in resilient power grids, reinforced transportation networks, and improved early warning systems to mitigate the impact of extreme storms.
    • Climate Adaptation & Policy Measures – Policymakers should integrate climate resilience into urban planning, enforce stricter building codes, and invest in sustainable land management to reduce vulnerabilities.

    Mains PYQ:

    Q Discuss the concept of air mass and explain its role in macro-climatic changes.(UPSC IAS/2016)