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GS Paper: GS3-19.Disaster and Disaster Management.

  • [5th October 2024] The Hindu Op-ed: Kerala urgently needs to identify risk zones

    PYQ Relevance:

    Q). 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. (UPSC CSE 2021)
    Q). Describe the various causes and the effects of landslides. Mention the important components of the National Landslide Risk Management Strategy. (UPSC CSE 2021)
    Q). Discuss the recent measures initiated in disaster management by the Government of India departing from the earlier reactive approach. (UPSC CSE 2020)
    Q). Disaster preparedness is the first step in any disaster management process. Explain how hazard zonation mapping will help disaster mitigation in the case of landslides. (UPSC CSE 2019)

    Prelims:

    The 2004 Tsunami made people realize that mangroves can serve as a reliable safety hedge against coastal calamities. How do mangroves function as a safety hedge? (UPSC CSE 2011)
    a) The mangrove swamps separate the human settlements from the sea by a wide zone in which people neither live nor venture out
    b) The mangroves provide both food and medicines which people are in need of after any natural disaster
    c) The mangrove trees are tall with dense canopies and serve as an excellent shelter during a cyclone or tsunami
    d) The mangrove trees do not get uprooted by storms and tides because of their extensive roots.

    Mentor’s Comment:  Today’s editorial discusses the limitations in our present governance and management concerning Natural Disasters. The recent landslide event in Kerala is considered one of the deadliest landslides in India’s history, raising urgent concerns about the effectiveness of disaster management strategies in the region, which has a history of similar incidents over the past four decades. Previously, we saw the limitations based on the Disaster Management Act. Now, this article will help you to build a better consensus around the same theme.

    _

    Let’s learn!

    Why in the News?

    On July 30, 2024, the Wayanad district in Kerala experienced devastating landslides that resulted in significant loss of life and property.

    • The Chief Minister (Kerala) emphasized the need for a reevaluation of disaster preparedness and response approaches, highlighting the helplessness against natural calamities across the state.

    Kerala is no longer relatively disaster-free:

    • The state of Kerala which is bordered by the Arabian Sea and Western Ghats, was once viewed as disaster-free, which influenced its development patterns.
    • The frequency and intensity of disasters have surged in recent decades. Over 250 km of Kerala’s coastline is affected by erosion.
      • Further, the high population density in the Western Ghats exceeded its vulnerability to disasters.
      • Lowlands like Vembanad Lake, frequently experience flooding during monsoons.
    • The 2018 floods were labeled the “floods of the century” by the World Meteorological Organization.
    • Infrastructure development has often ignored natural drainage and slope stability, leading to increased disaster risks.

    Why a Comprehensive inventory mapping is needed?

    • Physical Geography of the Region: Tectonic activity generally correlates with landslide occurrences.
      • For example, the Wayanad region is characterized by deep gorges and ravines, which is prone to landslides.
    • Climate Change Impact: Rapid warming of the Arabian Sea increases risks of extreme weather events like floods and cyclones. For example, the Cyclone Ockhi in 2017.
    • Research Gaps: Current understanding of landslide causative factors is limited; a nuanced approach is necessary for effective disaster mitigation.
    • Monitoring Mechanisms: Establishing monitoring systems for rainfall and tremors can provide timely warnings to prevent loss of life.
    • Shrinking Safe Space: The “safe operating space” for communities in Kerala is diminishing due to increasing natural disasters.

    Need for a Paradigm Shift (Way Forward):

    • Need to work on Disaster Risk Zones: Develop disaster risk zones based on physical and social criteria within a social-ecological framework, aligned with watershed boundaries.
      • Strengthening the disaster risk governance and invest them in risk reduction to enhance resilience and preparedness would be helpful.
    • Comprehensive Approach: Emphasize all aspects of the disaster cycle: preparedness, resilience, risk reduction, mitigation, reconstruction, recovery, response, and relief.
      • The Sendai’s global framework highlights the State’s primary role in disaster risk reduction while advocating for shared responsibility with local governments, private sectors, and communities.
    • Quadruple Helix Model: Utilize a collaborative model involving community organizations, academia, government, and industry for effective disaster risk management.
      • Engage communities in creating disaster risk maps through a community-based disaster risk management approach.

    https://www.thehindu.com/opinion/op-ed/once-landslide-susceptibility-maps-surrounding-population-centres-are-ready-monitoring-the-triggering-mechanism-would-ensure-that-timely-warnings-are-provided/article68717843.ece

  • Massive Greenland Landslide

    Why in the News?

    • In September 2023, seismic stations across the world detected an unusual signal which persisted for 9 days.
      • It was caused by a massive landslide in Greenland’s Dickson Fjord (i.e narrow sea inlet with steep sides or cliffs, created by a glacier).

    About the Massive Greenland Landslide

    • The landslide involved a colossal volume of 25 million cubic metres of rock and ice, equivalent to filling 10,000 Olympic-sized swimming pools.
    • The landslide involved 25 million cubic meters of rock and ice, which is enough to fill 10,000 Olympic-sized swimming pools.
    • This event caused a mega-tsunami with waves as high as 200 meters, which significantly impacted the area.
    • The seismic waves created by the landslide lasted for 9 consecutive days.
    • The loss of such a large amount of glacier ice highlights how global warming is speeding up damage to these fragile environments.

    Causes of the Greenland Landslide

    • The main reason for the landslide was global warming, which caused the glaciers in Greenland to melt and shrink over recent decades.
      • The Hvide Stovhorn peak glacier had been holding up the mountain slopes, but as it thinned, the rock above it became unstable and eventually collapsed.
    • The permafrost (frozen ground) on the mountain’s steep slopes started melting because of rising temperatures, making the slopes unstable.
    • When the rocks and ice fell into the fjord, it triggered a submarine landslide (a landslide under water), which made the event even bigger and caused a mega-tsunami.

    Back2Basics: Seismic Waves

    Type  Sub-Type Wave Characteristics Speed Medium of Travel Movement Impact
    Body Waves P-Waves (Primary Waves) • Longitudinal/compressional waves.
    • Fastest seismic waves.    		 Fastest (First to arrive) Solids and liquids Particles move back and forth in the direction of wave travel. First waves to be detected during an earthquake, cause less damage.
    S-Waves (Secondary Waves) • Transverse/shear waves.
    • Slower than P-waves.    		 Slower than P-Waves Solids only Particles move perpendicular to the wave’s direction. Follow P-waves, more ground shaking, cause more damage than P-waves.
    Surface Waves Love Waves • Transverse horizontal motion.
    • Faster than Rayleigh waves.    		 Slower than S-Waves Earth’s surface Particles move side to side, horizontally. Cause significant structural damage.
    Rayleigh Waves • Rolling motion.
    • Slowest seismic waves.    		 Slowest of all seismic waves Earth’s surface Particles move in an elliptical motion (both vertical and horizontal). Cause vertical and horizontal ground movement, highly destructive.

     

    PYQ:

    [2021] Describe the various causes and the effects of landslides. Mention the important components of the National Landslide Risk Management Strategy.

  • Typhoon Yagi

    Why in the News?

    India has launched Operation Sadbhav to provide humanitarian assistance to Southeast Asian countries affected by Typhoon Yagi, including Vietnam, Laos and Myanmar.

    Typhoon Yagi: Origin and Impact 

    • Typhoon Yagi began as a tropical storm in the western Philippine Sea on September 1, 2024.
      • Yagi, which means goat or the constellation of Capricornus in Japanese.
    • It made landfall in the Philippines but intensified again due to warm waters in the South China Sea, reaching Category 3 winds by September 4.
    • Yagi further strengthened to a Category 5 typhoon with peak winds of 260 kmph, making it one of only four Category 5 storms recorded in the South China Sea.
    • Although downgraded to a tropical depression, it continued to bring heavy rains and floods to Myanmar and other areas.

    What are Typhoons?

    • A Typhoon is a type of tropical cyclone that forms in the northwestern part of the Pacific Ocean, particularly affecting East Asia, Southeast Asia, and parts of Oceania.
    • They are characterized by strong winds, heavy rain, and can cause severe flooding, storm surges, and damage to infrastructure.

    Key Features of Typhoons:

    • Formation Region: Typhoons form in the Northwestern Pacific Ocean, primarily between 100°E and 180°E.
    • Wind Speed: To be classified as a typhoon, sustained winds must exceed 119 km/h.
    • Structure: Like hurricanes, typhoons have a central eye (calm area) surrounded by a violent eyewall where the strongest winds and heaviest rains occur.
    • Season: Typhoons typically occur from May to October, with a peak from August to September.

    Global Terminology:

    • Typhoon: Northwest Pacific Ocean.
    • Hurricane: North Atlantic, Central and Eastern North Pacific Oceans.
    • Cyclone: South Pacific and Indian Ocean.

     

    PYQ:

    [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 10ºC lesser than that of the surroundings.

    Which of the statements given above is/are correct?

    (a) 1 only

    (b) 2 and 3 only

    (c) 2 only

    (d) 1 and 3 only

  • Union Cabinet approves ‘Mission Mausam’

    Why in the News?

    The Union Cabinet has approved ‘Mission Mausam’ with a budget of ₹2,000 crore over two years.

    About Mission Mausam

    • Mission Mausam focuses on strengthening R&D in weather surveillance, forecasting, and atmospheric sciences.
    • The Ministry of Earth Sciences (MoES) will be the nodal body responsible for implementing the mission.
    • It aims to set a new benchmark for high-precision weather forecasting and management.
    • Three institutes under the MoES will lead the implementation of Mission Mausam:
    1. India Meteorological Department (IMD)
    2. Indian Institute of Tropical Meteorology (IITM)
    3. National Centre for Medium-Range Weather Forecasting (NCMRWF)

    Critical Components of the Mission: 

    • Next-generation radars and satellite systems equipped with advanced sensors.
    • Deployment of high-performance supercomputers to enhance computational capabilities.
    • Development of improved earth system AI models and a GIS-based automated Decision Support System for real-time data dissemination.

    Benefits and Applications

    • Mission Mausam is expected to benefit key sectors, including:
      • Agriculture, through improved weather prediction for farming activities.
      • Disaster management, with better preparedness for natural calamities.
      • Defence, aviation, and shipping, through enhanced forecasting for operational safety.
      • Energy, water resources, power, and tourism sectors.
    • The mission will also enhance data-driven decision-making for urban planning, transport, offshore operations, and environmental monitoring.

    PYQ:

    [2022] Discuss the meaning of colour-coded weather warnings for cyclone prone areas given by India Meteorological Department.

  • On uncommon cyclones in the Arabian Sea

    Why in the News?

    A rare August cyclone, named ‘Asna’, currently positioned off the Kutch coast is even more remarkable for having originated over land.

    Why was there a lot of excitement over Asna?

    • “Asna” is notable because it’s the first cyclone in August in the North Indian Ocean since 1981. August is typically not part of the cyclone season in this region.
    • The cyclone began as a land-born depression that intensified as it moved over the warm waters of the Arabian Sea. It formed from a rare strong low-pressure system that grew unusually powerful over land.
    • Asna’s formation is linked to the broader context of rapid warming over the Arabian Sea, influenced by climate change. The northward shift of the low-level jet stream due to warming over West Asia contributed to its development.

    Why does the North Indian Ocean have two cyclone seasons?

    The North Indian Ocean has two distinct cyclone seasons due to the unique monsoonal circulation patterns in the region:

    • Pre-monsoon season (March-May): The Arabian Sea warms rapidly during this time as the sun crosses over to the Northern Hemisphere. The Bay of Bengal is relatively warmer and begins producing atmospheric convection and rainfall. This leads to cyclogenesis in both the Arabian Sea and the Bay of Bengal.
    • Post-monsoon season (October-December): This is the northeast monsoon season for India. The Arabian Sea cools due to the strong southwesterly winds and mixing of cold subsurface waters. However, the Bay of Bengal remains favourable for cyclogenesis. The post-monsoon season is the major cyclone season in the North Indian Ocean

    How is climate change affecting the region?

    • Warming of the Indian Ocean: Climate change is amplifying the warming of the Indian Ocean, with more heat being transferred from the Pacific Ocean and Southern Ocean. This increases the overall sea surface temperature (SST), crucial for cyclone formation.
    • Monsoon and cyclones: The warming affects the monsoon patterns and has the potential to change cyclone intensity. More heat and moisture from the warming seas lead to more energy available for cyclones.
    • Impact on global ocean circulation: The warming of the Indian Ocean is also affecting global ocean currents, impacting heat uptake by the Pacific Ocean and water sinking in the North Atlantic. The Indian Ocean is playing a central role in global climate change processes.

    Way forward: 

    • Strengthening Early Warning Systems: Enhance real-time monitoring and forecasting of cyclones, particularly in the pre- and post-monsoon seasons, using satellite data and advanced models.
    • Building Climate Resilience: Implement climate adaptation strategies, especially for coastal communities, by improving infrastructure and disaster preparedness to cope with increasing cyclone intensity due to climate change.

    Mains PYQ:

    Q Discuss the meaning of colour-coded weather warnings for cyclone prone areas given by India Meteorological Department. (UPSC IAS/2022)

     

  • [3rd September 2024] The Hindu Op-ed: The Disaster Management (Amendment) Bill is knotty

    [3rd September 2024] The Hindu Op-ed: The Disaster Management (Amendment) Bill is knotty

    PYQ Relevance:

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

    Q Describe various measures taken in India for Disaster Risk Reduction (DRR) before and after signing ‘Sendai Framework for DRR (2015-2030)’. How is this framework different from ‘Hyogo Framework for Action, 2005’? (UPSC IAS/2018)

    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)

    Q Disaster preparedness is the first step in any disaster management process. Explain how hazard zonation mapping will help disaster mitigation in the case of landslides. (UPSC IAS/2019)

    Mentor comment: On August 1, 2024, the Indian government introduced the Disaster Management (Amendment) Bill in the Lok Sabha, aiming to amend the Disaster Management Act of 2005. The Bill centralized disaster management further by granting statutory status to existing bodies like the National Crisis Management Committee and establishing an Urban Disaster Management Authority for major cities. While it seeks to empower the National and State Disaster Management Authorities to prepare disaster plans and create a national disaster database, critics argue it complicates the disaster response framework and could delay actions during emergencies, undermining the Act’s original intent.

    _

    Let’s learn!

    Why in the News?

    The Disaster Management (Amendment) Bill 2024 introduced recently complicates the disaster response framework and could delay actions during emergencies, undermining the Act’s original intent

    What are the key highlights/features of this Bill?

    • Statutory Recognition for Existing Bodies: Grants statutory status to pre-existing organizations such as the National Crisis Management Committee (NCMC) and the High-Level Committee (HLC), enhancing their roles in managing major disasters.
    • Regulatory Powers: Empowers the NDMA to make regulations under the Act with prior approval from the central government, allowing for greater flexibility in disaster management.
    • Disaster Database: Mandates the creation of a disaster database at both national and state levels, which will include information on disaster assessments, fund allocations, expenditures, preparedness and mitigation plans, and risk registers.
    • Empowerment of National and State Authorities: The Bill empowers the National Disaster Management Authority (NDMA) and State Disaster Management Authorities (SDMAs) to directly prepare disaster management plans, replacing the previous role of the National and State Executive Committees.
      • It also establishes UDMAs (Urban Disaster Management Authorities) for state capitals and large cities with municipal corporations, excluding Delhi and Chandigarh.
    • State Disaster Response Force (SDRF): Provides for the constitution of SDRFs by state governments, which will be responsible for disaster response at the state level. The Bill allows states to define the functions and terms of service for these forces.
    • Focus on Disaster Risk Reduction (DRR): Expands the definition of disaster management to include disaster risk reduction, emphasizing proactive measures to reduce vulnerability and enhance preparedness.
    • Penalties for Non-compliance: Introduces provisions allowing the central and state governments to direct individuals to take necessary actions or refrain from actions to mitigate disaster impacts, with penalties for non-compliance capped at ₹10,000.

    Critics around the Disaster Management (Amendment) Bill, 2024:

    • Centralization of Decision-Making: The Bill dilutes the NDRF’s purpose by removing specific uses for the fund, which has historically led to delays in aid distribution during severe disasters, as seen in the delayed response to Tamil Nadu’s needs compared to Karnataka’s.
      • This centralization may hinder prompt action in urgent situations.
    • Restricted Definition of ‘Disaster’: The Bill does not classify ‘heatwaves’ as a notified disaster, despite their increasing frequency and severity in India. This restrictive approach limits the scope for addressing emerging climate-induced challenges effectively.

    Conclusion:

    There is a need to re-visit the Centre’s efforts in addressing the issue of financial preparedness when it comes to the management of and response to disasters. The decision should avoid the single most event of the Wayanad Disaster and needs to have a broader view. After all, a blame game will only move away from realizing the true spirit of cooperative federalism.

    https://www.thehindu.com/opinion/op-ed/the-disaster-management-amendment-bill-is-knotty/article68597815.ece

  • Land-Based Deep Depression causing extreme floods in Gujarat

    Why in the News?

    • Gujarat and parts of Rajasthan are facing severe flooding caused by a land-based deep depression.
      • The unusual formation of this deep depression over land was intensified by moisture influx from soils or the Bay of Bengal and the Arabian Sea.

    What is Land-Based Deep Depression?

    • A land-based deep depression is a type of cyclonic system characterized by a significant drop in atmospheric pressure leading to sustained wind and significant weather impact.
    • They form and intensify over land, which is relatively rare due to the limited availability of moisture.
    • Characteristics:
      • It forms over land or water.
      • Wind Speed ranges from 51 to 62 km/h, just below the threshold for a tropical cyclone (62-88 km/h).
      • Relies on moisture from soil and surrounding environments rather than oceanic sources.
      • It often has an unpredictable path and can cause significant rainfall and localized flooding.

    Implications of Land-Based Deep Depressions

    • These systems can bring prolonged and intense rainfall, leading to widespread flooding, especially in regions unaccustomed to high levels of precipitation.
    • Heavy rainfall can lead to significant soil erosion, affecting agricultural productivity and altering landscapes.
    • Prolonged flooding can cause waterlogging in agricultural fields, leading to soil salinization and reduced fertility.

    PYQ:

    [2012] Consider the following statements:

    1. The duration of the monsoon decreases from southern India to northern India.

    2. The amount of annual rainfall in the northern plains of India decreases from east to west.

    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

  • India, Russia sign working plan to handle emergencies

    Why in the News?

    India and Russia signed the working plan of the Joint Russian-Indian Commission on Cooperation in the Field of Emergency Management for 2025-2026.

    Background of the Cooperation:

    • The meeting held in Moscow aimed to strategize the execution of previous agreements between India and Russia, including:
      • The Inter-Governmental Agreement (IGA) for cooperation in the field of Emergency Management was signed in December 2010.
      • The regulation was established in 2013 to create the Indo-Russian Joint Commission for Cooperation in the prevention and elimination of emergency situations.
    • The first meeting of this commission was held in New Delhi in 2016.

    About the Joint Commission on the Cooperation in the Field of Emergency Management for 2025-2026

    • It is an initiative aimed at enhancing collaboration between India and Russia in the area of disaster management and emergency response.
    • The plan covers a two-year period from 2025 to 2026 and focuses on several key areas:
      • Use of Space Monitoring Technologies: To improve risk forecasting and emergency response capabilities.
      • Exchange of Experiences: On responding to large-scale disasters to enhance preparedness and response strategies.
      • Training of Specialists: In fire and rescue operations to build a robust capacity for emergency management.
    • The next meeting is scheduled to be held in India in 2026 to facilitate cooperation and strategic planning in emergency management.

    About the Indo-Russian Joint Commission for Cooperation 

    • Established in 2013, it seeks to formalize and enhance cooperation between India and Russia in the prevention and elimination of emergency situations.
    • It was formed under the framework of the Inter-Governmental Agreement (IGA) for Cooperation in the Field of Emergency Management, signed in December 2010.
    • The commission serves as a platform for India and Russia to collaborate on various aspects of disaster management, including:
      • Prevention and Preparedness: Developing strategies and sharing expertise to prevent and prepare for potential disasters.
      • Response and Recovery: Coordinating efforts to respond to emergencies and support recovery efforts following disasters.
      • Capacity Building: Enhancing the skills and knowledge of personnel involved in emergency management through joint training programs and knowledge exchange.
    • It facilitates a structured approach to managing disasters by leveraging the strengths and resources of both countries.

  • [pib] FloodWatch India Version 2.0 App

    Why in the News?

    The Union Ministry of Jal Shakti has launched Version 2.0 of the ‘FloodWatch India’ mobile application.

    About FloodWatch India Version 2.0

    • FloodWatch India Version 2.0 is a mobile application developed by Central Water Commission (CWC) under the Union Ministry of Jal Shakti.
    • The app provides real-time information and forecasts related to flood situations across India.
    • It now covers 592 flood monitoring stations, up from 200 in the previous version, offering a more comprehensive overview of flood conditions.
    • The app includes information on the storage positions of 150 major reservoirs in India, aiding in flood management.
    • Key features include:
      • It provides real-time river flow data and flood forecasts up to 7 days in advance.
      • Users can view state-wise and basin-wise flood forecasts and advisories.
      • The app uses satellite data analysis, mathematical modelling, and real-time monitoring to ensure accurate and timely flood information.
      • The app is available in English and Hindi and offers both readable and audio broadcast formats.

    PYQ:

    [2016] The frequency of urban floods due to high intensity rainfall is increasing over the years. Discussing the reasons for urban floods, highlight the mechanisms for preparedness to reduce the risk during such events.

  • What is the Nankai Trough?  

    Why on the News?

    Japanese authorities have warned its citizens of a ‘megaquake’ and large tsunamis along the Nankai Trough.

    What is the Nankai Trough?

    • The Nankai Trough is an extensive subduction zone, nearly 900 km long.
    • It is the place of collision of the Eurasian Plate over the Philippine Sea Plate.
    • This trough has a history of producing large earthquakes approximately every 100 to 150 years.
    • The most recent Nankai Trough quake happened in 1946 with magnitude 8.0 tremor and 6.9 metre tsunami, killing 1,330 people.

    Potential for a Megaquake: 

    • Japan’s researchers estimated in January 2022 that there is a roughly 70% chance of a magnitude 8-9 megaquake striking the Nankai Trough within next 30 years.
    • Such a quake could affect a vast region stretching from central Shizuoka, about 150 km south of Tokyo, to southwestern Miyazaki.

    PYQ:

    [2014] Explain the formation of thousands of islands in Indonesian and Philippines archipelagos.