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

  • What is Post-Disaster Needs Assessment (PDNA)?

    pdna

    Post-Disaster Needs Assessment (PDNA) is now being done simultaneously in Assam, Himachal Pradesh, Gujarat, Karnataka, Jharkhand, Maharashtra, Odisha and Meghalaya.

    Why in news?

    • PDNA is now being used to evaluate the financial and social cost of local disasters in eight states in India.
    • These states all experienced severe flooding in the last few months.
    • The results of these assessments are likely to come out next month.

    What is PDNA?

    • PDNA is an internationally accepted methodology for determining the physical damages, economic losses, and costs of meeting recovery needs after a natural disaster through a government-led process.
    • It is an international framework for assessing losses and damages in the aftermath of a disaster.
    • The framework helps get recovery and reconstruction efforts right following a disaster.
    • Globally, of the 55 PDNAs conducted worldwide since 2008, only two droughts — one in Malawi and the other Marshall Islands in 2016 — were of slow-onset disasters.

    Components of PDNA

    • PDNA includes a calculation of the disaster’s impact on Gross Domestic Product, the balance of payment and fiscal budget.
    • Secondly, how this affects the flow of revenue to multiple sectors is evaluated.
    • For example, the number of farmers’ income affected per damaged acre of land and the livelihoods lost.
    • Overall, a quantitative assessment is additionally done on the social and environmental impact of the disaster.

    History of PDNA in India

    • This is not the first time PDNA has been conducted in India.
    • It was first adopted during the Kerala floods of 2018 and again during the cyclone in Odisha in 2019, both unprecedented disasters.
    • Until now, the assessment was only limited to massive disasters that required international funding from the World Bank, the Asian Development Bank and the United Nations.

    15th Finance Commission provision

    • The 15th finance commission report of 2021, for the first time, made a provision for recovery and reconstruction in the national disaster management budget, which is at the core of the PDNA.
    • The states did not receive international funding to do the current ongoing PDNAs, as they are expected to take the money from the budget.

     

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  • Urban Challenge, Problems and Solutions

    Context

    • After flooding of major metropolitan cities of Bengaluru, Gurgaon and Delhi following heavy rainfall, the Centre has pointed to two cities – Davanagere and Agartala – as successful examples of cities that have curbed urban flooding.

    Why cities are  so important in India?

    • Drivers of Growth: Urbanisation has played and will continue to play a critical role in India’s growth story in the 21st century.
    • Cities are seen as GDP multipliers: By some estimates, Indian cities already contribute up to 70% of the country’s GDP. Yet, depending on which official estimates you use, India is just 26% or 31% urban. But there is growing evidence that India is more urban than is officially recognized.
    • Cities have more productivity: Well-functioning and diverse cities allow for the sharing and cross-pollination of ideas, which in turn drive greater productivity.

    Urban

    What are the Urban challenges?

    • Lack of Planning: current urban planning policies and practice have led to suboptimal use of land in Indian cities. This has multiple consequences. There is not enough floor space for accommodating migrants in search of economic opportunities; they make space for themselves in informal settlements. There is also not enough land in the public domain for developing adequate open spaces or augmenting infrastructure capacities.
    • Lack of Housing:The pandemic revealed that the cities’ economies rely on migrant populations in the formal and informal sectors. Workers in both markets move from rural to urban and urban to urban areas as they find better opportunities; they are mobile and need adequate rental options. Today, in most Indian cities, this demand is not met and leads to unaffordable options, pushing the poorer sections out to slums and other informal settlements.
    • Lack of Transport: Indian cities are infamous for their road congestion; three of them rank in the 10 most congested in the world according to the 2020 TomTom Travel Index with Mumbai ranking second. The existing public transportation systems are already overcrowded and of poor quality.
    • Lack of Public health: Like other health crises, the COVID-19 pandemic revealed the need to ensure adequate healthcare services and sanitation infrastructure for a healthy population in cities. In the initial months of the outbreak, the focus of health services shifted entirely towards addressing the novel coronavirus, leaving other health issues unaddressed and shutting down routine care services.
    • Impact on Environment: The causes for low air quality are multiple; vehicular movement and on-road congestion are major contributors. A safe and clean environment is key to good public health.
    • Problems faced by vulnerable sections: The economic shock and work from home guidelines changed migration patterns; workers in cities returned to their home towns and villages. Slum dwellers, with limited access to adequate infrastructure, and migrant workers, disenfranchised from social protection systems or daily wagers, were more vulnerable to this shock. In the medium and long term, it is difficult to predict what the job market will be in cities.

    Urban

    What can be done to address the urban challenges?

    • Future planning is necessary: Manage the spatial growth of cities and allow them to build more planned road networks for future horizontal expansion and revoke faulty policies that constrain the use of floor space to build vertically.
    • Housing for all scheme is important: Focus on providing public housing for the poor; India can learn from successful models in Singapore or Hong Kong and understand the strategic challenges of other international examples such as Mexico. India can also work toenable efficient rental markets
    • Holistic transport should be focused: Integrate formal and informal modes of transportation into holistic transportation strategies to ensure seamless mobility, as well as first and last mile connectivity.
    • Increasing funds to Cities: Decentralise fiscal powers to the local level and train city authorities so that they can make more strategic decisions in health expenditures or public health infrastructure, as well as gain the capacity to raise their own resources.
    • Need of a healthy Environment: Increase the number of open spaces in the public domain, maintain them and monitor their use. Prepare for disasters with robust framework of physical infrastructures, road networks and large open spaces. Build adequate infrastructure to support the sustainable development of emerging Tier-2 and Tier 3 towns.
    • More attention to vulnerable: Develop more systematic identification mechanisms of the urban poor to ameliorate the delivery of public services and social protection. Collect accurate data on migrant population and capture their socio-economic diversity to better address their needs. Monitor access to services, housing and jobs of the vulnerable communities in real time.

    Urban

    Conclusion

    • Urban infrastructure is crumbling day by day. In the next 25 years, cities will have more population than rural areas. Indian cities need urgent reform in order to unlock their economic potential and transform quality of life.

    Mains Question

    Q.Discuss the urban infrastructure challenges? What are the governments scheme and actions to address the urbanization challenges?

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  • Nord Stream Pipeline Leakage: A climate Catastrophe

    Nord StreamContext

    • Four leakages were reported at different points in the Nord Stream pipelines, linking Russia and Europe, since September 26. Two of the leaks were in Swedish waters while the other two were reported from Danish waters. The European Union said they suspected “sabotage” behind the leaks.

    What is Nord Stream Pipeline?

    • Nord Stream 1:
    • Nord Stream 1 is the biggest pipeline transporting natural gas between Russia and Europe via Germany.It is a system of offshore natural gas pipelines running under the Baltic Sea from Russia to Germany.
    • Nord Stream 1 is a 1,224 km underwater gas pipeline that runs from Vyborg in northwest Russia to Lubmin in northeastern Germany via the Baltic Sea.
    • Nord Stream 2:
    • Russian threats to choke this gas supply to Europe present an economic threat to Germany.
    • To expand options and double the supply from Russia, Germany decided to build Nord Stream 2.
    • The construction of the $11 billion-worth Nord Stream 2 was completed in 2021 but never began commercial operations.

    Nord StreamWhy the Nord Stream pipeline is so important?

    • For Germany: Energy prices in Germany, Europe’s largest economy, are among the lowest in the continent because of the cheap gas supplies via Nord Stream 1. This also makes German manufactured goods more competitive in the international market.
    • For European Union: In 2021, Russia supplied nearly 40 per cent of the EU’s natural gas needs through this pipeline. The flows through Nord Stream play a vital role in filling up the national storage tanks of EU. It is crucial to provide the required heating in the upcoming winter.
    • For Russia: Russia is using the supplies via the crucial pipeline as a bargain to navigate its economy through sanctions from the western countries.

    What is the current status of Nord Stream Pipeline?

    • Nord stream pipeline is the largest single supply route for Russian gas to Europe. The Russian state owned gas company Gazprom has a majority ownership in the pipeline.
    • While it was running at just 20% of its capacity since the Russia-Ukraine conflict began, the company, in early September fully cut gas flows from the pipeline on the pretext of maintenance.
    • According to Bloomberg, while 40% of Europe’s pipeline gas came from Russia before Russia Ukraine the war, the number now stands at just 9%.
    • Even though both pipelines were not running commercially, they had millions of cubic metres of gas stored in them.

    The recent leakage in the pipeline

    • Commercial Methane: Measuring satellite firm GHGSat says, that a conservative estimate based on available data suggested that the leaks together were releasing ‘more than500 metric tonnes of methane per hour’ when first breached, with the flow decreasing over time.
    • Biggest methane leakage ever: According to UNEP The leakage from the Nord Stream natural gas pipeline system under the Baltic Sea have led to perhaps the single biggest release of methane ever recorded.
    • Amount of leakage: The rate of leakage at one of the four points of rupture in the pipeline was 22,920 kg per hour. That is equal to burning about 286,000 kg of coal every hour, according to scientists.

    Nord StreamWhat will be the Impact of methane leakage?

    • Possibility of more leakage: With the timeframe for repairs being uncertain, the pipelines were unlikely to provide any gas to Europe in the forthcoming winter months, even if the political will to resume supply was found.
    • Commercial damage: European gas prices spiked after reports of the leaks emerged; European Benchmark prices rose 12% on Tuesday, while Dutch and British Prices continued to rise.
    • Ozone formation: Methane is the primary contributor to the formation of ground-level ozone, a hazardous air pollutant and greenhouse gas, exposure to which causes 1 million premature deaths every year.
    • Green House gas: Methane is also a powerful greenhouse gas. Over a 20-year period, it is 80 times more potent at warming than carbon dioxide.
    • Global warming: Methane has accounted for roughly 30 per cent of global warming since pre-industrial times and is proliferating faster than at any other time since record keeping began in the 1980s.
    • Emission have already increased during the lockdown: According to data from the United States National Oceanic and Atmospheric Administration, even as carbon dioxide emissions decelerated during the pandemic-related lockdowns of 2020, atmospheric methane shot up.

    Nord Stream

    Why is it important to reduce methane emission?

    • Short lifespan: Carbon dioxide remains in the atmosphere for hundreds to thousands of years. But it takes only about a decade for methane to break down. So, reducing methane emissions now would have an impact in the near term and is critical for helping keep the world on a path to 1.5°C.
    • Human caused methane emissions: Human-caused methane emissions could be reduced by as much as 45 per cent within the decade. This would avert nearly 0.3°C of global warming by 2045, helping to limit global temperature rise to 1.5˚C and putting the planet on track to achieve the Paris Agreement targets.
    • Prevent premature deaths: Every year, the subsequent reduction in ground-level ozone would also prevent 260,000 premature deaths, 775,000 asthma-related hospital visits, 73 billion hours of lost labour from extreme heat and 25 million tonnes of crop losses.
    • Reducing the Agriculture emission: Agriculture and allied activities remains the biggest contributor of methane emission. The UN’s Koronivia Joint Work on Agriculture initiative is supporting the transformation of agricultural and food systems, focusing on how to maintain productivity amid a changing climate. Representatives are also working to mainstream agriculture into the UN Framework Convention on Climate Change.

    Conclusion

    • Nord stream pipeline leakages will further exacerbate the ozone formation, Green House Gas emissions global warming and thereby climate change. In the spirit of Paris climate change agreement nations must act together to rein in the menace of GHG emissions.

    Mains Questions

    Q.Methane emission into atmosphere is done more by human activities than natural causes. In the spirit of Paris climate change agreement nations must act together to rein in the menace of GHG emissions. Explain

     

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  • Transboundary Flood Disasters

    Transboundary Flood Disasters

    Context

    • Pakistan experiencing devastation, with a spread of diseases and severe shortage of potable water after intense flooding. In June this year Assam experienced one of its worst floods in which it affected over 30 districts. Assam and Bihar frequently suffer from transboundary flood disasters.

    What is transboundary flood?

    • Floods that are originate in upper riparian state crosses the international boundary and also affects the lower riparian state. For example, river Brahmaputra causes flood both in China and India simultaneously.

    Transboundary Flood DisastersHow the transboundary floods are difficult to manage than normal floods?

    • Flooding is still considered to be a natural phenomenon that cannot be entirely prevented. But it is compounded by the lack of transparency in the sharing of hydrological information and also information relating to activities (such as by one riparian state) that are transboundary in their effect (affecting other riparian states), thus serving as an obstacle in understanding the magnitude of flooding.

    Transboundary Flood DisastersWhat is a riparian state?

    • A riparian state is state (or country) located alongside a river.

    What are the International laws governing transboundary waters?

    There are at two international treaties that governs the transboundary water

    • UNWC:
    • United Nations Convention on the Law of the Non-Navigational Use of International Watercourses (UNWC) 1997.UNWC contains a direct reference to floods, which covers harmful conditions and the emergency situations.
    • Article 27 of the Convention says, Watercourse States shall individually and, where appropriate, jointly, take all appropriate measures to prevent or mitigate conditions that may be harmful to other watercourse States, whether resulting from natural causes or human conduct or desertification.
    • Environmental Impact Assessment:
    • The International Court of Justice (ICJ), in the Pulp Mills on the River Uruguay (Argentina vs Uruguay) case of 2010, upheld that conducting a transboundary environmental impact assessment (TEIA) of a planned measure or projects on the shared water course is part of customary international law.
    • In fact, the ICJ noted that the acting state must notify the affected party of the results of TEIA for assessment of its own damages that are likely to occur.
    • UNECE: United Nations Economic Commission for Europe (UNECE) on the Protection and Use of Transboundary Watercourses and International Lakes 1992 (Water Convention).

    Transboundary Flood DisastersHow India manages transboundary flood?

    • Note:Neither India nor China are signatory to UNWC or UNCEC.
    • River Brahmaputra: India has signed the memorandum of understanding (MoU) with China in 2013 with a view to sharing hydrological information during the flood season (June to September). The MoU does not allow India access to urbanisation and deforestation activities on the Chinese side of the river basin.
    • Rivers Gandak and kosi: Floods are also a recurrent problem in the Kosi and Gandak river basins that are shared by India and Nepal.
    • The India-Nepal Kosi agreement 1954: Agreement aimed at reducing devastating flooding in the river basin. The treaty-based joint bodies have also tried to refine the early warning systems for flood forecasting.

    What are the suggestions?

    • Signing the treaty: Expert suggests, India by becoming a party to either the UNWC and the Water Convention could lay the groundwork for a bilateral treaty on the Brahmaputra but subject to the reservation that it should not insist on the insertion of a dispute settlement mechanism provision.
    • Information exchange: In contravention of procedural customary international law obligation, India considers data on transboundary rivers as classified information, which is one of the key challenges in developing cross-border flood warning systems. India needs to share the hydrological and river information for its own sake.

    Conclusion

    • Climate change has accelerated the frequency and intensity of floods across the world. with Changing climate India should also change its strategy to protect its people, to preserve the soil and to save its resources from the scourge of floods.

    Mains Questions

    Q.Climate change has created a more difficult challenge in flood management. In this context, what measures can be taken to deal with frequent transboundary floods in India. Discuss.

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  • Urban floods mitigation

    floods
    Context

    • Bengaluru floods are alarming us to go for robust disaster management strategies.

    What is flood?

    • Floods are the most frequent type of natural disaster and occur when an overflow of water submerges land that is usually dry. Floods are often caused by heavy rainfall, rapid snowmelt or a storm surge from a tropical cyclone or tsunami in coastal areas.

    Causes of frequent urban floods

    Natural

    • Meteorological Factors:Heavy rainfall, cyclonic storms and thunderstorms causes water to flow quickly through paved urban areas and impound in low lying areas.
    • Hydrological Factors: Overbank flow channel networks, occurrence of high tides impeding the drainage in coastal cities.
    • Climate Change: Climate change due to various anthropogenic events has led to extreme weather events.

    Anthropological

    • Unplanned Urbanization:Unplanned Urbanization is the key cause of urban flooding. A major concern is blocking of natural drainage pathways through construction activity and encroachment on catchment areas, riverbeds and lakebeds.
    • Destruction of lakes: A major issue in India cities. Lakes can store the excess water and regulate the flow of water. However, pollution of natural urban water bodies and converting them for development purposes has increased risk of floods.
    • Unauthorised colonies and excess construction: Reduced infiltration due paving of surfaces which decreases ground absorption and increases the speed and amount of surface flow
    • Poor Solid Waste Management System: Improper waste management system and clogging of storm-water drains because of silting, accumulation of non-biodegradable wastes and construction debris.
    • Drainage System:Old and ill maintained drainage system is another factor making cities in India vulnerable to flooding.
    • Irresponsible steps: Lack of attention to natural hydrological system and lack of flood control measures.

    floodsImpact of the devastation due to floods:

    • On economy: Damage to infrastructure, roads and settlements, industrial production, basic supplies, post disaster rehabilitation difficulties etc.
    • On human population and wildlife:Trauma, loss of life, injuries and disease outbreak, contamination of water etc.
    • On environment:Loss of habitat, tree and forest cover, biodiversity loss and large scale greenery recovery failure.
    • On transport and communication: Increased traffic congestion, disruption in rail services, disruption in communication- on telephone, internet cables causing massive public inconvenience.

    Solutions for effective flood management

    • Improved flood warning systems: effective flood warning systems can help take timely action during natural calamities and can save lives. Pre-planning can significantly reduce the effects of floods, giving people time to migrate to safer locations and stock up essentials.
    • Building flood-resilient housing systems: concreting floors can be very useful during floods. Houses should be water proofed and electric sockets should be placed at higher levels up the walls to reduce the chances of shocks.
    • Constructing buildings above flood levels: buildings should be constructed a metre above from the ground to prevent flood damage and evacuation during floods.
    • Resilience to Climate change: drastic climate changes have increased the frequency of natural disasters in many parts of the world. Governments should bring about environment-friendly policy level changes and eliminate the ones hazardous to the environment to tackle the problem of global warming.
    • Create wetlands and encourage reforestation: creating more and more wetlands can help soak up excessive moisture since wetlands act as sponges. Wooded areas can also slow down heavy water flow, minimizing the effects of floods. Reforesting upstream regions can significantly reduce the effects of flood damage.
    • Improve soil conditions: improper soil management, animal hooves, and machinery can make soil compacted. As a result, instead of holding water in and absorbing moisture, the water runs off immediately. Properly drained soil can absorb large amounts of rainwater and can prevent it from flowing into the rivers.
    • Installing flood barriers: these are flood gates designed to prevent the area behind the barrier from flooding. They can also be kept around buildings to keep floodwaters outside the boundary created.
    • Development of GIS– Geographical Information System (GIS) based National Database: for disaster management. GIS is an effective tool for emergency responders to access information in terms of crucial parameters for disaster-affected areas.
    • Developing a Federal flood management plan: with responsibilities of union and state clearly defined.
    • Creation of 2nd flood commission: (Rashtriya Barh Aayog, created in 1976) to study the flood situation in India under rising challenges of climate change and propose a national-level flood resilience and management plan.

    Way forward

    • Resilience of people: The rapid transformation in rainfall characteristics and flooding patterns demand building people’s resilience.
    • Reconsider projects: Construction projects that impede the movement of water and sediment across the floodplain must be reconsidered.
    • Use of technology: At the same time, climate-imposed exigencies demand new paradigms of early-warning and response systems and securing livelihoods and economies.

    Conclusion

    • We can learn to live with nature, we can regulate human conduct through the state and we can strategically design where we build. We need to urgently rebuild our cities such that they have the sponginess to absorb and release water without causing so much misery and so much damage to the most vulnerable of our citizens.

    Mains question

    Q. We need to urgently rebuild our cities such that they have the sponginess to absorb and release water. Discuss the statement in context of urban flood management strategy in India.

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  • What are Tetrapods?

    In Mumbai, the unusual vibrations (like earthquakes), coinciding with high-tide times, were the result of the relocation of tetrapods as part of the ongoing Coastal Road Project (MCRP).

    What are tetrapods?

    • Tetra pod in Greek means four-legged.
    • These are four-legged concrete structures that are placed along coastlines to prevent erosion and water damage.
    • Tetrapods were first used in France in the late 1940s to protect the shore from the sea.
    • They are typically placed together to form an interlocking but porous barrier that dissipates the power of waves and currents.
    • These are large structures, sometimes weighing up to 10 tonnes, and interlocked tetra pods act as a barrier that remains stable against the rocks when buffeted by waves.
    • Tetrapods, each weighing about 2 tonnes, were placed along Marine Drive in the late 1990s to break and dissipate waves and maintain the reclaimed shoreline in South Mumbai.

    How do we know that the removal of the tetrapods was responsible?

    • The BMC has provided vibration monitoring instruments at the site to study the impact of the phenomenon.
    • While the corporation has not officially stated that the removal of the tetrapods caused the vibrations, it has agreed to re-install the structures.
    • They would be put back over the next two-three days during low tide.

     

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  • [pib] Coalition for Disaster Resilient Infrastructure (CDRI)

    The Union Cabinet has approved the categorization of the Coalition for Disaster Resilient Infrastructure (CDRI) as an ‘International Organization’.

    What is the news?

    • The cabinet also signed as the Headquarters Agreement (HQA) with CDRI for granting it the exemptions, immunities and privileges as contemplated under the United Nations (Privileges & Immunities) Act, 1947.
    • This will provide CDRI an independent and international legal persona so that it can efficiently and effectively carry out its functions internationally.

    What is CDRI?

    • The CDRI is an international coalition of countries, UN agencies, multilateral development banks, the private sector, and academic institutions that aim to promote disaster-resilient infrastructure.
    • Its objective is to promote research and knowledge sharing in the fields of infrastructure risk management, standards, financing, and recovery mechanisms.
    • It was launched by the Indian PM Narendra Modi at the 2019 UN Climate Action Summit in September 2019.
    • CDRI’s initial focus is on developing disaster-resilience in ecological, social, and economic infrastructure.
    • It aims to achieve substantial changes in member countries’ policy frameworks and future infrastructure investments, along with a major decrease in the economic losses suffered due to disasters.

    Its inception

    • PM Modi’s experience in dealing with the aftermath of the 2001 Gujarat earthquake” as the chief minister led him to the idea.
    • The CDRI was later conceptualized in the first and second edition of the International Workshop on Disaster Resilient Infrastructure (IWDRI) in 2018-19.
    • It was organized by the National Disaster Management Authority (NDMA), in partnership with the UN Office for Disaster Risk Reduction (UNDRR), the UN Development Programme, the World Bank, and the Global Commission on Adaptation.

    Its diplomatic significance

    • The CDRI is the second major coalition launched by India outside of the UN, the first being the International Solar Alliance.
    • Both of them are seen as India’s attempts to obtain a global leadership role in climate change matters and were termed as part of India’s stronger branding.
    • India can use the CDRI to provide a safer alternative to China’s Belt and Road Initiative (BRI) as well.

    Why designated as International Organization?

    • Deputing experts to other countries
    • Deploying funds globally and receive contributions from member countries
    • Making available technical expertise to assist countries
    • Imparting assistance to countries in adopting appropriate risk governance arrangements and strategies for resilient infrastructure
    • Aligning with the Sustainable Development Goals (SDGs), the Paris Climate Agreement and the Sendai Framework for Disaster Risk Reduction
    • Leveraging international engagement to foster disaster-resilient infrastructure at home; and,
    • Providing Indian scientific and technical institution as well as infrastructure developers an opportunity to interact with global experts.

    Try this PYQ:

    Q.Consider the following statements:

    1. Climate and Clean Air Coalition (CCAC) to Reduce Short Lived Climate Pollutants is a unique initiative of G20 group of countries
    2. The CCAC focuses on methane, black carbon and hydrofluorocarbons.

    Which of the above statements is/are correct?

    (a) 1 only

    (b) 2 only

    (c) Both 1 and 2

    (d) Neither 1 nor 2

     

    [wpdiscuz-feedback id=”g1rfo9e6dp” question=”Please leave a feedback on this” opened=”1″]Post your answers here.[/wpdiscuz-feedback]

     

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  • Why Assam gets flooded every year

    Disaster struck Dima Hasao, central Assam’s hill district, in mid-May after incessant heavy rainfall.

    Impacts of the disaster

    • The 170 km railway line connecting Lumding in the Brahmaputra Valley’s Hojai district and Badarpur in the Barak Valley’s Karimganj district was severely affected.
    • The Assam government and Railway Ministry’s assessments said the district suffered a loss of more than ₹1,000 crore, but ecologists say the damage could be irreversibly higher.

    How severe has the rain been in Assam?

    • Assam is used to floods, sometimes even four times a year, resultant landslides and erosion.
    • But the pre-monsoon showers this year have been particularly severe on Dima Hasao, one of three hill districts in the State.
    • Landslips have claimed four lives and damaged roads.
    • The impact has been most severe on the arterial railway, which was breached at 58 locations leaving the track hanging in several places.
    • The disruption of train services, unlikely to be restored soon, has cut off the flood-hit Barak Valley, parts of Manipur, Mizoram and Tripura.

    Why is the railway in focus post-disaster?

    • Dima Hasao straddles the Barail, a tertiary mountain range between the Brahmaputra and Barak River basins.
    • The district is on the Dauki fault (the prone-to-earthquakes geological fractures between two blocks of rocks) straddling Bangladesh and parts of the northeast.
    • British engineers were said to have factored in the fragility of the hills to build the railway line over 16 years by 1899.
    • The end result was an engineering marvel 221 km long over several bridges and through 37 tunnels, laid along the safer sections of the hills.

    A faulty experiment

    • A project to convert the metre gauge track to broad gauge was undertaken in 1996 but the work was completed only by March 2015 because of geotechnical constraints and extremist groups.
    • The broad-gauge track was realigned to be straighter, but a 2009-10 audit report revealed that the project had been undertaken without proper planning and visualisation of the soil strata behaviour.
    • The report gave the example of the disaster-prone Tunnel 10 on the realigned track that was pegged 8 meters below the bed of a nearby stream.

    Is only the railway at fault?

    • There is a general consensus that other factors have contributed to the situation Dima Hasao is in today.
    • Roads in the district, specifically the four-lane Saurashtra-Silchar (largest Barak Valley town) East-West Corridor, have been realigned or deviated from the old ones that were planned around rivers and largely weathered the conditions.
    • The arterial roads build over the past 20 years often cave in and get washed away by floods or blocked by landslides.
    • Shortened cycles of jhum or shifting cultivation on the hill slopes and unregulated mining have accentuated the “man-made disaster”.
    • Massive extraction of river stone, illegal mining of coal and smuggling of forest timbe has led to the disaster.
    • These activities have increased water current besides weakening either side of riverbanks.

    How vital are the rail and highway through Dima Hasao?

    • Meghalaya aside, Dima Hasao is the geographical link to a vast region comprising southern Assam’s Barak Valley, parts of Manipur, Mizoram and Tripura.
    • Moreover, this track is vital for India’s Look East policy that envisages shipping goods to and from Bangladesh’s Chittagong port via Tripura’s border points at Akhaura and Sabroom.
    • These are the last railway station near the Feni River that serves as the India-Bangladesh border.

     

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  • Devastation in Dima Hasao and its after-effects

    Disaster struck Dima Hasao, central Assam’s hill district, in mid-May after incessant heavy rainfall.

    Impacts of the disaster

    • The 170 km railway line connecting Lumding in the Brahmaputra Valley’s Hojai district and Badarpur in the Barak Valley’s Karimganj district was severely affected.
    • The Assam government and Railway Ministry’s assessments said the district suffered a loss of more than ₹1,000 crore, but ecologists say the damage could be irreversibly higher.

    How severe has the rain been in Assam?

    • Assam is used to floods, sometimes even four times a year, resultant landslides and erosion.
    • But the pre-monsoon showers this year have been particularly severe on Dima Hasao, one of three hill districts in the State.
    • Landslips have claimed four lives and damaged roads.
    • The impact has been most severe on the arterial railway, which was breached at 58 locations leaving the track hanging in several places.
    • The disruption of train services, unlikely to be restored soon, has cut off the flood-hit Barak Valley, parts of Manipur, Mizoram and Tripura.

    Why is the railway in focus post-disaster?

    • Dima Hasao straddles the Barail, a tertiary mountain range between the Brahmaputra and Barak River basins.
    • The district is on the Dauki fault (the prone-to-earthquakes geological fractures between two blocks of rocks) straddling Bangladesh and parts of the northeast.
    • British engineers were said to have factored in the fragility of the hills to build the railway line over 16 years by 1899.
    • The end result was an engineering marvel 221 km long over several bridges and through 37 tunnels, laid along the safer sections of the hills.

    A faulty experiment

    • A project to convert the metre gauge track to broad gauge was undertaken in 1996 but the work was completed only by March 2015 because of geotechnical constraints and extremist groups.
    • The broad-gauge track was realigned to be straighter, but a 2009-10 audit report revealed that the project had been undertaken without proper planning and visualisation of the soil strata behaviour.
    • The report gave the example of the disaster-prone Tunnel 10 on the realigned track that was pegged 8 meters below the bed of a nearby stream.

    Is only the railway at fault?

    • There is a general consensus that other factors have contributed to the situation Dima Hasao is in today.
    • Roads in the district, specifically the four-lane Saurashtra-Silchar (largest Barak Valley town) East-West Corridor, have been realigned or deviated from the old ones that were planned around rivers and largely weathered the conditions.
    • The arterial roads build over the past 20 years often cave in and get washed away by floods or blocked by landslides.
    • Shortened cycles of jhum or shifting cultivation on the hill slopes and unregulated mining have accentuated the “man-made disaster”.
    • Massive extraction of river stone, illegal mining of coal and smuggling of forest timbe has led to the disaster.
    • These activities have increased water current besides weakening either side of riverbanks.

    How vital are the rail and highway through Dima Hasao?

    • Meghalaya aside, Dima Hasao is the geographical link to a vast region comprising southern Assam’s Barak Valley, parts of Manipur, Mizoram and Tripura.
    • Moreover, this track is vital for India’s Look East policy that envisages shipping goods to and from Bangladesh’s Chittagong port via Tripura’s border points at Akhaura and Sabroom.
    • These are the last railway station near the Feni River that serves as the India-Bangladesh border.

     

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  • Recurring urban floods point to need for moving away from land-centric urbanism

    Context

    Flood in Chennai has revived memories of the devastating Chennai floods of 2015, a collective trauma that its residents are yet to outlive.

    Role of climate change

    • In August this year, as monsoon floods raged across the subcontinent, IPCC’s 6th Assessment Report (AR6) was published.
    • The report noted the increasing frequency of heavy precipitation events since the 1950s and inferred that they were being driven by human-induced climate change.
    • The climate crisis, is here.
    • It has made extreme rainfall events more severe and unpredictable than ever before.

    Role of poor planning and encroachment

    • In 2015, the National Green Tribunal in India formed a committee to report on the status of natural stormwater drains in Delhi.
    • On inspection, out of the 201 “drains” recorded in 1976, 44 were found to be “missing.
    • Geospatial imaging established that 376 km of natural storm drains — encroached on and paved over — had disappeared from Bengaluru.
    • In both cases, these “missing” waterways were either encroached and built over or connected to sewage drains.
    • Poor design and corruption significantly contribute to urban floods.
    • By violating environmental laws and municipal bye-laws, open spaces, wetlands and floodplains have been mercilessly built over, making cities impermeable and hostile to rainwater.

    Way forward

    • We need to move away from land-centric urbanisation and recognise cities as waterscapes.
    • We need to let urban rivers breathe by returning them to their floodplains.
    • The entire urban watershed needs to heal, and for that to happen, we need less concrete and more democracy and science at the grassroots.

    Conclusion

    Ever since concretisation became shorthand for urbanisation, rainfall in a changing climate no longer finds its way towards subterranean capillaries or surface water bodies.

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