Daily Current Affairs - 10, 11 & 12 September 2026
Today’s Top Current Affairs for UPSC: Key national and international developments explained for Prelims and Mains, with quick revision points and practice questions.
What Is a ‘Region’? Understanding Regionalism in a Changing Global Order
The wars and strategic realignments in West Asia, Europe and the Indo-Pacific have revived a fundamental question in international relations: what actually makes a region?
A region is not simply a fixed geographical area. It can also be created and reshaped by shared identities, economic links, security interests, political institutions and great-power competition.
This matters because labels such as West Asia, Indo-Pacific, Europe, Arab world or Southeast Asia describe different kinds of regions. Some are strongly geographical; others derive much of their significance from culture, politics or strategic interaction.
Geography, Identity and Institutions
At its simplest, a region is a territorial space whose constituent areas are connected by certain geographical, cultural, political, economic or institutional characteristics.
Different disciplines therefore understand regions differently. Geography gives greater attention to space, scale and the relationship between societies and territory, while international relations is particularly interested in whether states within an area interact sufficiently to constitute a meaningful political or strategic unit.
For example, Africa can be understood primarily as a continental geographical region, whereas the Arab world is also constructed through linguistic and cultural connections. The Indo-Pacific, meanwhile, has acquired particular significance as a strategic conception linking the Indian and Pacific Oceans.
This means regions are not necessarily permanent. Their boundaries and political significance can change as trade routes, threats, identities and power relations change.
Regionalism and Great-Power Politics
Regionalism refers broadly to processes through which states and societies within a region develop cooperation, institutions, rules or a sense of common interest.
Nationalism and great-power politics have historically influenced this process. Nationalism links territory with political identity and sovereignty, while great powers can turn geographical areas into spheres of influence or strategic theatres.
Smaller and middle powers may consequently support regional institutions to preserve their autonomy.
ASEAN, established in 1967 during the Cold War, illustrates how regional cooperation can help Southeast Asian states manage external competition while promoting regional stability.
Similarly, the contemporary Indo-Pacific framework reflects the increasing strategic integration of the Indian and Pacific Oceans, including concerns about maritime security, economic connectivity and the regional balance of power.
A region is therefore partly constructed through political interaction rather than merely discovered on a map.
What Makes Regionalism Durable?
Effective regionalism usually depends on some combination of shared interests, political commitment, institutions, economic interdependence and accepted rules.
It can weaken when these foundations erode. Wars, unilateral military action, competing security alliances, protectionism and intensifying great-power rivalry can fragment previously established regional arrangements.
The changing security environment in West Asia, the Russia-Ukraine war in Europe, and evolving US-China competition in the Indo-Pacific demonstrate how security threats can redefine the political meaning of geographical space.
At the same time, institutions can themselves reshape regional identity. ASEAN, the European Union, African Union and other arrangements demonstrate how repeated political and economic cooperation can make a region more institutionally coherent.
This produces an important distinction:
Region = the geographical/social/political space
Regionalism = the political process or project of building cooperation within that space
Regionalisation = increasing interactions and integration that make the region more interconnected
BRICS and a Changing International Order
The debate is particularly relevant ahead of the 18th BRICS Summit in New Delhi on September 12–13, 2026. Since September 12 is still upcoming at the time of writing, the summit should be described as scheduled, not as already concluded. The Government of India says the summit will bring together member and partner countries to discuss intra-BRICS cooperation and global and regional issues.
BRICS is also useful for understanding the limits of the traditional idea of a region: it is not a geographically contiguous regional organisation. Its 11 members span several continents, demonstrating how contemporary international groupings can be organised around shared economic and geopolitical interests rather than territorial proximity. India's 2026 Chairship theme is “Building for Resilience, Innovation, Cooperation and Sustainability.”
Thus, today's international order contains both geographical regionalism and broader interest-based or transregional groupings.
Prelims Quick Revision
Region: territorial space connected by geographical, cultural, economic, political or institutional characteristics.
A region is not necessarily defined only by physical geography.
Regionalism: deliberate political/institutional cooperation among actors within a region.
Regionalisation: growing interaction and integration within a geographical area.
ASEAN: established in 1967; an important example of Southeast Asian regionalism.
Indo-Pacific: strategic conception linking the Indian and Pacific Ocean spaces.
Great-power rivalry can both stimulate and undermine regionalism.
Durable regionalism generally requires shared interests, institutions and political commitment.
BRICS demonstrates that an influential international grouping need not constitute a geographically contiguous region.
India will host the 18th BRICS Summit in New Delhi on September 12–13, 2026.
BRICS currently has 11 members, according to the Government of India.
India's BRICS 2026 theme: Building for Resilience, Innovation, Cooperation and Sustainability.
Possible Mains Question
A region is not merely a geographical expression but can also be a political and institutional construction. Explain. In the context of contemporary developments in West Asia, Europe and the Indo-Pacific, discuss how great-power politics can both encourage and undermine regionalism.
Proposed Article 371(K) for Ladakh: Constitutional Safeguards, Elected Governance and the Sixth Schedule Debate
The Centre has proposed exploring a new Article 371(K) to provide special constitutional safeguards for Ladakh, following talks between the Ministry of Home Affairs (MHA) and representatives of the Leh Apex Body (LAB) and Kargil Democratic Alliance (KDA).
However, the most important point is that Article 371(K) does not yet exist in the Constitution and no final draft has been released. The proposal remains under negotiation, and crucial questions concerning executive, financial, planning and law-and-order powers are unresolved.
Why Is Ladakh Seeking Constitutional Protection?
Ladakh became a Union Territory without a legislature following the reorganisation of the former State of Jammu and Kashmir in 2019. Local groups subsequently raised concerns about political representation, land, employment, natural resources, environmental protection and preservation of Ladakh's cultural identity.
LAB and KDA have sought greater democratic control, alongside constitutional safeguards. Under the proposal discussed with the Centre, a directly elected UT-level governing body could receive legislative powers over subjects such as land, culture and language, forests, environment and natural resources. But the precise distribution of powers remains undecided.
This is why the development should currently be described as a proposal, not as a constitutional amendment already adopted.
Article 371(K) vs Sixth Schedule
Ladakh's earlier demands prominently included protection under the Sixth Schedule.
Under Article 244(2), the Sixth Schedule provides special governance arrangements for specified tribal areas in Assam, Meghalaya, Tripura and Mizoram. It establishes Autonomous Districts and Autonomous Regions, with District and Regional Councils exercising constitutionally specified legislative, administrative and, in some areas, judicial functions.
The emerging Article 371(K) model appears structurally different.
Sixth Schedule → autonomous institutions primarily at district/regional level
Proposed Article 371(K) → a Ladakh-specific, directly elected body at the Union Territory level
The comparison cannot yet be taken further with certainty because there is no final Article 371(K) text. Whether the proposed body will receive executive authority, independent budgetary powers, control over planning, or powers concerning police and public order remains a matter for negotiations.
What Are Articles 371 to 371-J?
Part XXI of the Constitution contains Temporary, Transitional and Special Provisions. Articles 371 to 371-J create different arrangements for particular States rather than establishing one uniform model.
For example, Article 371A protects specified Naga religious and social practices, customary law and procedures, administration of civil and criminal justice involving Naga customary law, and ownership and transfer of land and its resources; relevant Acts of Parliament do not apply to Nagaland on these matters unless its Legislative Assembly so decides.
Article 371G provides broadly comparable protections concerning Mizo religious/social practices, customary law and land. Other provisions establish different arrangements for states including Maharashtra, Gujarat, Assam, Manipur, Andhra Pradesh/Telangana, Sikkim, Arunachal Pradesh, Goa and Karnataka.
A Ladakh-specific Article 371(K) would therefore be unusual because Ladakh is a Union Territory, whereas the existing Article 371-series provisions concern States.
Article 240 and Ladakh
Another important constitutional provision is Article 240, which empowers the President to make regulations for the peace, progress and good government of specified Union Territories.
The reported negotiations envisage giving the proposed elected Ladakh body legislative authority over certain matters presently falling within the UT's governance framework.
This raises the central constitutional question: how much meaningful legislative and executive autonomy can be created for Ladakh while it remains a Union Territory without a conventional Legislative Assembly?
The answer will depend on the final constitutional text. A new Article 371(K) would require constitutional change through Parliament; until such legislation is introduced and enacted, its precise scope should not be assumed.
Prelims Quick Revision
Ladakh: Union Territory without a legislature since the 2019 J&K reorganisation.
Article 371(K): presently only a proposal; it is not yet part of the Constitution.
No final draft detailing Article 371(K)'s powers has yet been released.
Proposed model: directly elected UT-level governing body with legislative authority over specified subjects.
Issues discussed include land, culture/language, forests, environment and natural resources.
Part XXI: Temporary, Transitional and Special Provisions.
Existing special provisions run from Articles 371 to 371-J.
Sixth Schedule: linked to Articles 244(2) and 275(1).
Sixth Schedule currently covers specified tribal areas in Assam, Meghalaya, Tripura and Mizoram.
Article 240: President's regulation-making power for specified Union Territories.
Existing Article 371-series provisions apply to particular States; a Ladakh provision would therefore represent a distinctive constitutional arrangement for a UT.
Do not confuse Article 371 special provisions with the Sixth Schedule—they are separate constitutional mechanisms.
Marital Rape Exception Before Supreme Court: Marriage, Consent and Individual Autonomy
The Supreme Court is preparing for final hearings on the constitutional validity of India's marital rape exception, while raising an important preliminary question: can a husband be prosecuted for rape for non-consensual sex with his adult wife when the penal law currently expressly excludes such acts from the offence of rape?
On September 9, a Bench comprising Chief Justice of India Surya Kant and Justices Joymalya Bagchi and V. Mohana acknowledged that marriage does not extinguish an individual's autonomy, but said the Court must examine the legal consequences of the existing statutory exception before permitting a rape prosecution. Final hearings are to begin after three weeks.
What Does the Current Law Say?
Under the Bharatiya Nyaya Sanhita (BNS), 2023, Section 63 defines rape and defines consent as an “unequivocal voluntary agreement” communicated through words, gestures or verbal/non-verbal communication.
But Exception 2 to Section 63 states that sexual intercourse or sexual acts by a man with his own wife, if the wife is not under 18 years of age, is not rape.
This broadly carries forward the marital exception that existed under Exception 2 to Section 375 of the IPC.
Therefore, the present constitutional dispute is not about whether consent matters within marriage as a social or ethical principle. The legal question is whether this marital classification in the rape law can survive constitutional scrutiny, particularly under Articles 14 and 21.
The Constitutional Conflict: Autonomy vs Existing Penal Law
Petitioners challenging the exception argue that marriage cannot amount to permanent consent to sexual activity. They contend that excluding married women from rape-law protection creates a distinction based purely on marital status and therefore raises questions under Article 14 (equality) and Article 21 (life, dignity, privacy and personal autonomy).
The other side raises a different constitutional issue: criminal liability must have a clear basis in existing penal law. The Court is consequently examining whether prosecution for rape can proceed while the statutory exception itself remains valid.
This distinction is crucial:
Non-consensual marital sex can violate a woman's autonomy and cause harm, while the separate legal question is whether it presently constitutes the specific criminal offence of rape under Section 63 BNS.
The Supreme Court has not yet delivered its final constitutional ruling.
What Have Courts Previously Said?
The litigation has reached the Supreme Court through multiple routes.
In 2022, the Delhi High Court delivered a split verdict on challenges to the marital rape exception, leaving the constitutional question unresolved.
Separately, the Karnataka High Court in 2022 allowed rape charges against a husband to proceed in a case involving allegations of forced sexual intercourse. That decision is now under challenge before the Supreme Court. The Supreme Court's official case records confirm the appeal arising from the Karnataka High Court judgment.
There is another important precedent. In Independent Thought v. Union of India (2017), the Supreme Court read down the old IPC marital exception so that sexual intercourse with a wife below 18 years could not receive the marital exemption.
And in a 2022 abortion-rights judgment, the Supreme Court held that for purposes of the Medical Termination of Pregnancy framework, the meaning of sexual assault or rape could include a husband's sexual assault upon his wife. The Court specifically clarified that this interpretation was for the MTP framework and did not itself abolish the IPC marital rape exception.
Why the Debate Goes Beyond Criminal Law
Historically, marital rape immunity was associated with the old common-law idea that marriage produced irrevocable sexual consent and with the broader doctrine of coverture, under which a married woman's independent legal identity was severely constrained.
Modern constitutional jurisprudence increasingly treats marriage as a relationship between individuals who continue to possess dignity, privacy, bodily integrity and decisional autonomy.
Those supporting removal of the exception therefore argue that marital status should not determine whether forced sexual intercourse constitutes rape.
Arguments against simply striking down the exception include concerns about judicial creation or expansion of criminal liability, evidentiary difficulties, possible misuse, and the view that redesigning the criminal-law framework governing marriage should be undertaken by Parliament.
The constitutional issue before the Court is consequently not simply “marriage versus criminalisation.” It involves reconciling individual autonomy and equality with legality, legislative competence and the principles governing penal statutes.
Prelims Quick Revision
Current law: Exception 2 to Section 63, Bharatiya Nyaya Sanhita, 2023 retains the marital rape exception where the wife is 18 years or older.
Section 63 BNS: defines rape and consent.
Article 14: equality before law and equal protection of laws.
Article 21: protection of life and personal liberty; constitutional jurisprudence encompasses dignity, privacy and autonomy.
Article 20(1): protects against conviction for an act that was not an offence when committed and against a greater retrospective penalty.
Independent Thought v. Union of India (2017): Supreme Court effectively raised the age threshold in the IPC marital exception to 18 years.
Delhi High Court (2022): delivered a split verdict on the constitutional challenge to the marital rape exception.
Karnataka High Court (2022): allowed prosecution of a husband for rape in the case now under challenge before the Supreme Court.
Supreme Court MTP judgment (2022): recognised marital sexual assault within the meaning of rape for purposes of the abortion-law framework; it did not generally criminalise marital rape under the IPC.
Countries including the UK, Canada, Australia and South Africa have removed marital rape immunity through judicial or legislative developments.
The Supreme Court has not yet struck down India's marital rape exception. The constitutional question remains pending.
Possible Mains Question
Marriage does not extinguish the bodily autonomy and dignity of either spouse, but criminal liability must also satisfy constitutional principles governing penal law. In this context, examine the constitutional debate surrounding India's marital rape exception with reference to Articles 14, 20 and 21 of the Constitution.
India’s New GDP Series: Producer Prices, Double Deflation and Why the Numbers Changed
India's new GDP series, with 2022-23 as the base year instead of 2011-12, has triggered debate over how economic growth is measured. The controversy intensified after real GDP grew 7.8% in Q1 of 2026-27, while critics argued that alternative calculations could produce much weaker growth.
The key point is that the official 7.8% figure and critics' estimates such as 2.6% are not directly comparable calculations if they combine numbers from different GDP series. MoSPI maintains that growth must be calculated using estimates constructed consistently within the same statistical series and methodology.
The debate nevertheless highlights two important improvements in India's national accounts: better measurement of the informal sector and the move towards double deflation.
Why Did the GDP Numbers Change?
GDP measures the value of final goods and services produced within a country's domestic territory. On the production side:
GDP = Gross Value Added (GVA) + product taxes − product subsidies
GVA is essentially the value of output minus the value of intermediate goods and services consumed in producing it.
A major change in the 2022-23 series concerns India's large unincorporated or informal sector. Earlier estimates often depended on benchmark surveys that were projected forward using indicators and proxies because comprehensive annual information was unavailable.
The new series can use annual information from the Annual Survey of Unincorporated Sector Enterprises (ASUSE) together with the Periodic Labour Force Survey (PLFS). MoSPI says this allows household and unincorporated economic activity to be measured more directly rather than relying heavily on older proxy-based extrapolation.
This is one reason estimates for earlier overlapping years changed when reconstructed under the new series. Such revisions should not automatically be interpreted as economic activity having suddenly disappeared; the measurement framework itself has changed.
What Is Double Deflation?
To calculate real GVA, statisticians must remove the effect of changing prices.
Suppose a manufacturer produces goods worth ₹150 but uses intermediate inputs worth ₹100:
Nominal GVA = ₹150 − ₹100 = ₹50
If the prices of outputs and inputs rise at different rates, using a single price index to deflate both can distort measured real value added.
Under double deflation:
Real output = nominal output ÷ output-price index
Real intermediate consumption = nominal inputs ÷ appropriate input-price index
Real GVA = real output − real intermediate consumption
MoSPI's new series adopts double deflation for various manufacturing industries, with output and intermediate consumption deflated separately. The Ministry describes this as a more conceptually robust method where suitable price information is available.
Importantly, double deflation is not applied uniformly to every sector of the economy. Where appropriate price indices are unavailable, MoSPI uses other methods such as volume or single extrapolation.
Why Does the Producer Price Index Matter?
The new framework also makes use of the Producer Price Index (PPI). Unlike consumer inflation, which tracks prices faced by consumers, a PPI measures price changes from the producer's perspective.
MoSPI's latest clarification states that in manufacturing, item-level Output PPI is used to deflate output, while intermediate consumption is separately deflated using relevant input indices.
This can produce results different from CPI or older WPI-based calculations because consumer prices, producer output prices and input costs need not move together.
Consequently, even when commonly observed prices are rising, a particular sector's GVA implicit price deflator can behave differently. GVA is a residual—output minus intermediate consumption—so movements in input and output prices can generate counter-intuitive changes in the resulting deflator.
MoSPI specifically cautions that the GDP implicit price deflator should not be expected to move one-for-one with CPI or PPI.
Why Changing the Base Year Matters
A base year provides the reference structure used for measuring real economic activity.
As an economy changes, an old base year becomes progressively less representative. New industries emerge, consumption patterns change, digital and platform activities expand, production structures evolve, and better databases become available.
Moving from 2011-12 to 2022-23 allows India's national accounts to incorporate newer datasets and updated economic structures. MoSPI says ASUSE and PLFS also improve annual measurement of unincorporated businesses, self-employment and other household-sector economic activities.
But methodological improvement does not eliminate the need for scrutiny. Credibility depends on transparent methodology, timely publication of underlying datasets, comparable back-series, independent academic evaluation and continued improvement of informal-sector and services-sector statistics.
Prelims Quick Revision
New GDP base year: 2022-23; previous base year: 2011-12.
GDP: value of final goods and services produced within domestic territory during a specified period.
GDP = GVA + product taxes − product subsidies.
Nominal GDP: measured at current prices.
Real GDP: removes the effect of price changes.
GDP deflator: broad implicit measure of price changes derived from nominal and real GDP.
Double deflation: output and intermediate consumption are deflated separately before calculating real GVA.
New series uses double deflation for various manufacturing industries, not automatically for the entire economy.
PPI: Producer Price Index; measures price movements from the producer perspective.
Manufacturing output is now deflated using item-level Output PPI, with relevant indices used separately for intermediate inputs.
ASUSE: Annual Survey of Unincorporated Sector Enterprises.
PLFS: Periodic Labour Force Survey.
ASUSE + PLFS improve measurement of India's unincorporated/household sector.
GNP/GNI differs from GDP: GDP is based on domestic territory, whereas national income incorporates residents' income relationships with the rest of the world.
GDP estimates are routinely revised as more comprehensive data become available; revision by itself does not establish that an earlier estimate was erroneous.
Mercury Is Shrinking Faster Than Expected: What Planetary Contraction Reveals About Its Interior
A new study suggests that Mercury has contracted substantially more over its geological history than earlier estimates indicated. Researchers estimate that the planet's diameter may have decreased by as much as about 23 km, as its interior gradually cooled after Mercury formed roughly 4.5 billion years ago.
This does not mean Mercury is losing comparable amounts of mass. Rather, cooling causes its interior to contract, reducing the planet's volume and producing distinctive tectonic features on its surface.
Why Is Mercury Shrinking?
Mercury is unusual among the terrestrial planets because of its very large metallic core relative to the planet's size. As heat from its formation and internal evolution is gradually lost, the interior cools and contracts.
The rigid outer crust must accommodate this reduction in planetary volume. It does so partly through compressional tectonic deformation, producing faults and long cliff-like landforms known as lobate scarps.
A useful analogy is a fruit developing wrinkles as its interior contracts—although Mercury's actual process occurs through planetary cooling and rock deformation over geological timescales.
The latest research also indicates that impact-generated material covering Mercury's surface may have obscured part of this tectonic record, causing previous analyses to underestimate the total amount of contraction.
Lobate Scarps and Tectonics Without Plate Tectonics
Lobate scarps are curved or irregular cliff-like landforms produced largely by thrust faults, where crustal material is pushed over adjacent material as the crust is compressed.
They provide geological evidence of Mercury's global contraction.
This is particularly important because Mercury does not have Earth-like plate tectonics. Earth has multiple mobile lithospheric plates interacting at their boundaries; Mercury essentially has a single outer shell.
Yet Mercury still displays tectonic deformation.
This demonstrates an important planetary-science principle:
tectonic activity does not necessarily require plate tectonics.
A planet can experience crustal faulting and deformation because of processes such as global cooling and contraction, volcanic activity, impacts or internal stresses.
Why Studying Mercury Matters
The extent of contraction provides scientists with a way to test models of Mercury's thermal evolution and interior composition.
If Mercury contracted more than previously estimated, models may need to account for factors such as a hotter early interior, different rates of heat loss or different assumptions about the composition and evolution of its unusually large core.
Comparing Mercury with Earth, Mars, Venus and the Moon can therefore help scientists understand why rocky bodies that formed from broadly similar early Solar System material subsequently developed very different geological histories.
The finding should not, however, be interpreted as proof that Mars or the Moon are currently shrinking at the same rate; rather, it provides new constraints for comparing the thermal evolution of rocky worlds.
MESSENGER to BepiColombo
Our detailed understanding of Mercury's surface comes primarily from two NASA missions: Mariner 10, which conducted three Mercury flybys in 1974–75, and MESSENGER, the first spacecraft to orbit Mercury.
The new contraction analysis draws on the much more extensive surface observations made possible by MESSENGER.
A major new phase of exploration is now approaching. BepiColombo, a joint European Space Agency (ESA)-Japan Aerospace Exploration Agency (JAXA) mission, successfully separated its Mercury Transfer Module on September 3, 2026 after an eight-year journey.
Its two scientific spacecraft—ESA's Mercury Planetary Orbiter (MPO) and JAXA's Mercury Magnetospheric Orbiter (Mio)—are scheduled to enter Mercury orbit together on November 21, 2026, separate in December, and begin their main science phase in April 2027.
BepiColombo will investigate Mercury's surface, interior, magnetic field and surrounding space environment, providing new evidence with which to test models of its geological and thermal evolution.
Prelims Quick Revision
Mercury: smallest and innermost planet of the Solar System.
Mercury's contraction is primarily associated with long-term cooling of its interior.
Shrinking means a reduction in planetary radius/volume, not equivalent loss of planetary mass.
New research indicates Mercury's total contraction may have been underestimated.
Lobate scarps: cliff-like compressional tectonic features, commonly associated with thrust faulting.
Mercury does not possess Earth-like plate tectonics.
Mercury has an unusually large metallic core relative to its overall size.
Mariner 10: first spacecraft to visit Mercury.
MESSENGER: first spacecraft to orbit Mercury.
BepiColombo: joint ESA-JAXA mission.
BepiColombo consists principally of MPO (ESA) and Mio (JAXA) scientific orbiters.
Planned Mercury orbit insertion: November 21, 2026; science operations are expected from April 2027.
Planetary tectonic deformation does not necessarily require plate tectonics.
Bihar Floods Despite Rainfall Deficit: Why the Ganga, Sediment and Backwater Effect Matter
Bihar's 2026 floods demonstrate why seasonal rainfall within a state alone cannot determine its flood risk. Between June 1 and September 8, Bihar received about 601.1 mm of rainfall—27% below normal. Yet the Ganga rose to exceptional levels, while intense local rainfall and high upstream discharge aggravated flooding.
This is possible because Bihar lies in a vast interconnected river system. Water falling hundreds of kilometres upstream can ultimately produce flooding in Bihar even when Bihar itself has a seasonal rainfall deficit. IMD separately monitors rainfall at state, subdivision and river-basin scales—an important distinction when analysing floods.
Why Is Bihar So Vulnerable to Floods?
Bihar occupies the middle Gangetic plain, a low-gradient alluvial region crossed by the Ganga and numerous tributaries.
Northern rivers such as the Kosi, Gandak, Bagmati and Kamla originate in or receive substantial flows from the Himalayan region and Nepal. Southern and western river systems, along with the Ganga itself, connect Bihar to rainfall and discharge generated across a much larger basin.
The 2026 episode was unusual because the Ganga became the principal source of concern before the Nepal-fed rivers, according to Bihar officials. Upstream rainfall and discharge from areas including Uttar Pradesh contributed to the Ganga's rise.
At Gandhi Ghat, Patna, the river reportedly reached 50.58 metres, exceeding the previous 2016 highest flood level of 50.52 metres. CWC records confirm that 50.52 metres was the previous recorded HFL at Gandhi Ghat.
Backwater Effect and Sediment: The Geography Behind the Flood
The backwater effect occurs when high water levels in a main river obstruct the normal discharge of its tributaries.
Imagine a tributary trying to empty into the Ganga when the Ganga itself is already exceptionally high. Water cannot drain efficiently, causing levels to rise upstream in the tributary and surrounding floodplain.
Thus:
High Ganga level → slower tributary drainage → water backs up → wider inundation
Bihar's rivers also transport large quantities of sediment, particularly from the young and erosion-prone Himalayan system. Deposition can create sandbars, raise local channel beds, alter channels and reduce effective conveyance in particular reaches.
The Kosi is especially known for historical channel migration, while the Ganga and its tributaries create diara lands—dynamic riverine islands and low-lying alluvial tracts that may be fertile and inhabited but remain highly flood-prone.
This makes Bihar's flood problem simultaneously meteorological, hydrological and geomorphological.
Claims attributing the present episode primarily to Nepal therefore oversimplify the event. Nepal-origin rivers are central to Bihar's long-term flood geography, but the 2026 flood sequence was strongly influenced by the Ganga and upstream basin conditions elsewhere as well.
Why Flood Management Must Go Beyond Embankments
Embankments, drainage channels and other engineering works remain necessary, but they cannot eliminate flood risk across an active alluvial river system.
An integrated approach requires floodplain zoning, protection of natural drainage and wetlands, sediment and river-basin management, forecasting, resilient infrastructure, restrictions on high-risk construction, evacuation planning and interstate/international coordination.
India's Central Water Commission (CWC) operates flood forecasting and monitoring systems, while NDMA's SACHET system integrates warnings from agencies including CWC and IMD for geo-targeted dissemination.
The policy objective should therefore shift from attempting to completely control rivers towards reducing exposure and learning to manage unavoidable flood risk.
Prelims Quick Revision
Bihar lies in the Gangetic alluvial plain and is crossed by the Ganga and numerous tributaries.
Major north Bihar rivers include Kosi, Gandak, Bagmati and Kamla.
A seasonal rainfall deficit does not prevent floods; upstream rainfall, concentrated extreme rainfall and river discharge matter.
Bihar received about 601.1 mm rainfall between June 1 and September 8, 2026—27% below normal, according to the reported IMD-based figures.
Gandhi Ghat previous HFL: 50.52 m, recorded in 2016; CWC records confirm this benchmark.
Backwater effect: high water in a main river obstructs drainage from tributaries, potentially causing upstream flooding.
Diara: low-lying, shifting riverine/alluvial land associated with river channels and deposition.
Sediment load influences channel depth, morphology, migration and flood behaviour.
CWC: principal central agency involved in river monitoring and flood forecasting.
IMD: monitors rainfall at multiple spatial scales, including states and river basins.
Flood management requires both structural measures (embankments, drainage works, reservoirs where appropriate) and non-structural measures (forecasting, floodplain zoning, preparedness and land-use regulation).
Bihar's flood vulnerability is not simply a “Nepal releases water” problem; it must be understood at the river-basin scale.
Manipur NRC and the 1951 Baseline: Why the Proposed Cut-off Is Contentious
The Manipur government has said that 1951 would be the proposed base year for an updated National Register of Citizens (NRC) in the state. Home Minister Govindas Konthoujam also clarified that Manipur cannot implement an NRC independently without the Centre's approval, while efforts are underway to trace records from the 1951 NRC.
The demand has acquired greater significance amid concerns over migration, demographic change and political representation. However, 1951 is presently a proposed baseline, not an operational NRC cut-off backed by a final central framework.
Why Is 1951 Being Proposed?
Manipur historically had a permit system regulating entry by outsiders. This system was abolished in November 1950. In 1951, India's first post-Independence Census was conducted and a National Register of Citizens was also prepared, including in Manipur.
Supporters of the 1951 baseline therefore argue:
Old permit system abolished in 1950 → NRC prepared in 1951 → 1951 provides an early documentary baseline for identifying subsequent settlement.
The demand is not new. Political agreements and movements in Manipur have invoked 1951 for decades, and the Manipur People's Protection Bill, 2018 also used 1951 in defining long-settled residents. That Bill, however, did not become law.
Importantly, population growth by itself cannot establish illegal immigration. Changes in population can reflect fertility, mortality, internal migration, enumeration quality and other demographic factors.
NRC, NPR and Census Are Not the Same
The Census is a statistical enumeration of the population. It collects demographic, social and economic information and is not a citizenship-determination exercise.
The National Population Register (NPR) is a register of usual residents, irrespective of citizenship status.
The National Register of Indian Citizens (NRIC/NRC), by contrast, is intended as a register of Indian citizens.
The legal framework for citizen registration is provided by the Citizenship Act, 1955 and the Citizenship (Registration of Citizens and Issue of National Identity Cards) Rules, 2003. The Rules empower the Registrar General of Citizen Registration to prescribe procedures for preparing the National Register and dealing with claims and objections.
Thus:
Census → population statisticsNPR → usual residentsNRC/NRIC → citizens
Why Manipur Cannot Simply Copy Assam's NRC
Assam has a distinct statutory and historical framework arising from the Assam Movement and the Assam Accord of 1985.
Under Section 6A of the Citizenship Act, persons of Indian origin who came to Assam from the specified territory before January 1, 1966, subject to statutory conditions, were deemed citizens. Those who entered between January 1, 1966 and before March 25, 1971 were subjected to a different registration framework, while March 25, 1971 became the crucial exclusionary cut-off.
In 2024, the Supreme Court upheld the constitutional validity of Section 6A and recognised that the March 1971 cut-off arose from Assam's particular historical circumstances surrounding migration and the creation of Bangladesh.
Manipur has no equivalent to Section 6A establishing 1951 as a citizenship cut-off. Any NRC exercise would therefore require the Centre to determine its legal, evidentiary, procedural and appeals framework.
Why Are Kuki-Zo Groups Opposed to a 1951 Baseline?
A major concern is documentary availability.
Many hill areas were remote and poorly connected in 1951. Critics argue that incomplete enumeration or missing historical documents could make it difficult for genuine long-settled or indigenous residents to establish documentary links to that year.
This creates the central administrative problem:
absence of a 1951 document does not necessarily prove that a person or their ancestors were absent from Manipur in 1951.
The problem is compounded by displacement resulting from Manipur's recent ethnic conflict.
Any eventual process would therefore require clear rules governing acceptable legacy documents, family linkage, claims and objections, appeals and treatment of people whose documentation is incomplete.
Where Does the Inner Line Permit Fit In?
Manipur was brought under the Inner Line Permit (ILP) regime in 2019.
The ILP system regulates the entry and stay of Indian citizens from outside protected states/areas under the Bengal Eastern Frontier Regulation, 1873.
But ILP and NRC perform fundamentally different functions:
ILP → regulates entry/stay of Indian citizens from outside the protected area
NRC → seeks to determine/register Indian citizenship
Therefore, being subject to an ILP requirement does not mean that an Indian citizen becomes a foreigner, and an NRC should not be confused with a mechanism regulating domestic movement.
Prelims Quick Revision
NRC/NRIC: National Register of Indian Citizens.
Manipur has proposed 1951 as the baseline, but no final NRC framework has yet been notified.
The 1951 NRC was prepared alongside India's first post-Independence Census.
Census ≠ NPR ≠ NRC.
Census provides population statistics; NPR concerns usual residents; NRC concerns citizens.
Legal framework: Citizenship Act, 1955 + Citizenship (Registration of Citizens and Issue of National Identity Cards) Rules, 2003.
Section 6A of the Citizenship Act provides the special citizenship framework associated with the Assam Accord.
Assam's critical cut-off is March 24/25, 1971, arising from its distinct historical and statutory framework.
Supreme Court upheld Section 6A in 2024.
Manipur does not presently have an Assam-like Section 6A establishing 1951 as a citizenship cut-off.
ILP: Inner Line Permit; regulates entry/stay in protected areas and is conceptually different from an NRC.
Major challenges to a 1951 baseline include incomplete records, proving ancestry, historical under-enumeration, displacement, procedural fairness and appeals.
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