- India 2026
- Annex A
Methodology
How the edition was made: methods, the model card, the evidence cut and its age, the acceptance record and the glossary.
Contents
- ·Edition home
- ·Executive summary
- 1India’s risk is monsoon-dependent, heat-loaded and changing fast in power
- 2Key findings
- 3Systems and sectors at baseline
- 4Risks and capability
- 5A second deficient monsoon across groundwater, kharif output, power demand and food budgets
- 6Readings from the other desks
- 7The 2027 agenda
- 8Systems in depth
- AMethodology
- BData appendix
- CReferences and record
- ·Complete edition, for print
A.1Methods
The baseline uses published values and four simple derivations. Each is shown in full so that any reader can reproduce it.
| No. | Derivation | Calculation | Result |
|---|---|---|---|
| (1) | Non-fossil share of installed capacity, 31 July 2026 | 300.50 ÷ 552 | ≈ 54.4% |
| (2) | Groundwater stage of extraction, 2025 | 247.22 ÷ 407.75 | 60.63% |
| (3) | Monsoon 2026 deficit against the long period average | 868.6 − 759.4 | 109.2 mm |
| (4) | Growth in foodgrain estimate, 2025–26 on 2024–25 | 376.563 ÷ 357.732 − 1 | ≈ 5.3% |
| Strength | Definition |
|---|---|
| STRONG | a disruption in the source system has historically changed the target system’s service or output within one season |
| MODERATE | an effect is documented but buffered or slower |
| WEAK | an effect is plausible but not documented at national scale |
| Label | Rule |
|---|---|
| Reported | value as issued by its source, with year |
| Inferred | reasoned from cited evidence; never a measurement |
| Estimated | Nexus analytical value with stated method |
| Scenario | conditional on stated assumptions |
| Expert input | structured editorial judgement awaiting evidence |
A.2Model card, National Model v0
- Model ID
- MDL-IND-NATIONAL · v0.1
- Purpose
- represent India as coupled water, energy, food, health and biodiversity systems with forcing and transmission layers
- Family
- graph-based system of systems
- Inputs
- the cited sources of this edition; no proprietary data
- Method
- expert-specified coupling strengths (STRONG · MODERATE · WEAK) from evidence and analogue events
- Validation
- none yet, first validation against Q1 2027 Foundry evidence
- Uncertainty
- qualitative; strengths are hypotheses, not measurements
- Domain of validity
- national scale; not for state or asset-level use
- Reproducibility
- strength table and sources published in this edition
20couplings
typed in v0
9strong
documented within one season
7moderate
documented, buffered
4weak
plausible, undocumented
A.3The baseline evidence cut
Every Nexus edition is published from a frozen evidence cut. The baseline cut is documentary: it pins the exact edition of every source cited. Model runs begin with the first Foundry cut in Q1 2027.
- Cut ID
- NQ-IND-2026-Q0-1
- Type
- baseline documentary cut
- Resolution policy
- pinned · as of 30 September 2026
- Sources pinned
- 52 cited sources, each at the edition and retrieval date in the references
- Model runs
- none at baseline, analytical values are stated with their method
- Digest
- computed at freeze and recorded in the publication record
- Supersedes
- nothing, first cut of the series
- Superseded by
- NQ-IND-2027-Q1-1 at the Q1 2027 close
Lineage
- 01
source edition
- 02
pinned citation
- 03
finding
- 04
page
- 05
publication record
| Element | Baseline 2026 | Q1 2027 |
|---|---|---|
| Sources | cited publications, pinned by edition | qualified source bindings with versions |
| Analysis | stated methods and editorial estimates | typed analysis specifications |
| Models | National Model v0 specification | model runs with receipts |
| Findings | twelve baseline findings | findings re-bound to the cut |
| Review | five passes scheduled | five passes on the exact digest |
A.4Evidence age and coverage
A 2026 edition rests on evidence observed in many different years. This page shows each time base, so that no single year label hides older evidence.
| Indicator | Observed | Released | Cadence | Next release |
|---|---|---|---|---|
| Emissions inventory | 2020 | Dec 2024 | biennial | biennial |
| Annual climate statement | 2025 | Jan 2026 | annual | annual |
| Monsoon season summary | 2026 | Sep 2026 | annual | annual |
| Groundwater assessment | 2025 | Dec 2025 | annual | annual |
| Installed power capacity | 31 Jul 2026 | Aug 2026 | monthly | monthly |
| Foodgrain estimate | 2025–26 | May 2026 | four a year | four a year |
| World Bank population | 2025 | Oct 2026 | annual | annual |
| Heat-death reports | 2025 | Jul and Aug 2025 | one-off | ad hoc |
| Air-pollution mortality | 2019 | Oct 2026 | irregular | irregular |
| System | Coverage | Thinnest dimension |
|---|---|---|
| Climate forcing | GOOD | heat deaths; sub-state extremes |
| Energy | GOOD | hourly balancing; coal share of generation |
| Food | PARTIAL | kharif 2026 outcome; stock depth |
| Health | THIN | heat deaths; current air-pollution burden |
| Water | PARTIAL | national reservoir series; basin balances |
| Biodiversity | PARTIAL | condition outside protected areas |
| Hazard losses | THIN | insured and uninsured losses |
| Digital | THIN | dependency mapping |
A.5Evidence cards, two anchor sources
Prepared by the Government of India as its fourth biennial update report to the UNFCCC, submitted at the end of 2024. Calendar-year basis. Role: binds CLI-008 and the sector figures. The report was read through press reports of its figures, because the primary document was not opened.
EVD-IND-001
Emissions inventory 20205
Issued by the India Meteorological Department on 1 January 2026. Annual. Role: binds CLI-001 and CLI-003. Death counts are compiled from media and disaster-authority reports.
EVD-IND-002
Annual climate statement 202514
| Dimension | EVD-IND-001 | EVD-IND-002 |
|---|---|---|
| Completeness | all gases by sector; land use as a net sink | temperature, rain, cyclones; deaths from reports |
| Timeliness | four years after the inventory year | one day after the year end |
| Revision | back-revised in later reports | one-off annual release |
| Method transparency | published methodology | base periods stated |
| External validation | not bound in this edition | not bound in this edition |
Evidence cards to follow in Q1 2027
A.6Publication acceptance record
Editorial self-check at evidence close. Every applicable item carries a disposition; the remaining items are review, approval and deposit.
| Group | Area | Items | Pass | N/A | Pending |
|---|---|---|---|---|---|
| D1 | Identity and scope | 8 | 8 | 0 | 0 |
| D2 | Source and data | 12 | 9 | 1 | 2 |
| D3 | Analysis and models | 12 | 3 | 8 | 1 |
| D4 | Findings and claims | 9 | 8 | 0 | 1 |
| D5 | Figures, tables, maps | 10 | 6 | 2 | 2 |
| D6 | Editorial and citations | 10 | 8 | 0 | 2 |
| D7 | Review and approval | 13 | 0 | 0 | 13 |
| D8 | Artefact and design | 12 | 7 | 0 | 5 |
| D9 | Registry and release | 9 | 0 | 0 | 9 |
Publication gate
- Conditions met
- 14 of 23 at evidence close
- Blocking problems
- none recorded
- Open conditions
- reviews, approval of the exact digest, deposit, registry pointer
Not applicable at baseline
- Model runs
- first runs in Q1 2027
- Maps
- plates in Q2 2027
- Waivers
- none
A.7Status words
| Status | What it means |
|---|---|
| Observed | Measured directly and published by the source. |
| Reported | Published statistics of an official or institutional source. |
| Declared | Stated by the body concerned; not independently measured. |
| Estimated | A Nexus estimate from cited evidence, with its method in Annex A. |
| Modelled | Produced by a stated model from cited inputs. |
| Inferred | Reasoned from cited evidence; not measured. |
| Forecast | A projection by the cited source. |
| Simulated | A simulation result under stated assumptions. |
| Scenario | A conditional statement under stated assumptions; never a prediction. |
| Expert input | Expert judgement, recorded with its basis. |
| Candidate | Proposed for a later edition; not yet evidence. |
| Evidence-quality levels (EQL 1 to 5) grade the source behind a value; they are not a score of the subject. | |
A.8How the edition is made, released and corrected
Every edition is built from a sealed evidence cut, reviewed under three keys, signed and deposited before any site shows it as published; corrections go to Nexus Standards as change proposals and feed the next cut.
| Step | What happens | Source |
|---|---|---|
| 01 Evidence arrives from the pillars | Foundry seals observations and indicator series, Universe hands over after-action and scenario findings, and contributions are screened at every gateway, including this site’s. | |
| 02 The cut is sealed | On the cut date the evidence is pinned under one identifier, so anyone can rebuild the edition from exactly what it was built on. | |
| 03 The edition is assembled | The edition is drafted from its template and content pack. Agents may draft; they never publish and never decide. | |
| 04 The keys turn | At the publisher of record the truth key comes first: every value is checked against its source or stated method before the meaning and capital keys turn. No edition moves on until every key has been turned by a named steward. | |
| 05 The gate opens | A named approver releases one exact digest of the edition; any change after this point is a new version, never a silent edit. | |
| 06 Signed and deposited | The PDF, the web edition and the data bundle are signed together with a manifest and an RO-Crate description, and deposited on Zenodo with a concept and a version DOI. | |
| 07 Published on its desk’s site | Only then does the edition show as published on its desk’s Reports site, and the Collection lists it as a part. | |
| 08 Corrections go to Standards | Method and correction findings go to Nexus Standards as change proposals; citations, corrections and new contributions feed the next evidence cut. |
A teaching model of the process, not a forecast and not a record of any run; dates and counts on this page come from the programme record. Sources: Reports governance at GCRI Canada (2026); Zenodo, repository of record for Reports deposits (2026).
Lifecycle, one state at a time: Draft, Computed, Evidence bound, Reviewed, Approved for release, Published, Corrected, Superseded. This edition is a draft.
A.9Glossary and abbreviations
| Term | Meaning |
|---|---|
| Baseline Edition | the inaugural annual edition that fixes the reference state for the series |
| WEFH+B | water, energy, food, health and biodiversity, the national nexus core |
| Coupling | a typed dependency through which one system transmits to another |
| Protection gap | the share of losses not covered by insurance |
| Capability ladder | LISTED → EXISTS → ADEQUATE → TESTED → DEMONSTRATED |
| EQL | evidence-quality level, 1–5 |
| Evidence cut | a frozen resolution of exact sources and versions |
| NNC · NLC · NWG | National Nexus Consortium · National Leadership Council · National Working Groups |
| Abbreviation | Expansion |
|---|---|
| BCM | billion cubic metres |
| BUR | biennial update report |
| CEA | Central Electricity Authority |
| CGWB | Central Ground Water Board |
| CWC | Central Water Commission |
| FSI | Forest Survey of India |
| GIEWS | Global Information and Early Warning System, FAO |
| IMD | India Meteorological Department |
| LPA | long period average |
| LULUCF | land use, land-use change and forestry |
| MNRE | Ministry of New and Renewable Energy |
| NCDC | National Centre for Disease Control |
| NDC | nationally determined contribution |
| NDMA | National Disaster Management Authority |
| ORGI | Office of the Registrar General and Census Commissioner |
| WDI | World Development Indicators, World Bank |
A.10Technical annex
| Item | Annex | Contents | Status |
|---|---|---|---|
| A.1 | Indicator definitions | the baseline indicator set, with units and sources | IN THIS EDITION |
| A.2 | Coupling strengths | the twenty-cell matrix and its rationale | IN THIS EDITION |
| A.3 | Scenario specification | SCN-IND-MON-01 assumptions and signposts | IN THIS EDITION |
| A.4 | Capability placements | rung evidence for fifteen functions | IN THIS EDITION |
| A.5 | Model diagnostics | first runs and validation | Q1 2027 |
| A.6 | Sensitivity analyses | influence of coupling strengths | Q2 2027 |
| A.7 | State notes | atlas cards for every state | Q2 2027 |
| A.8 | Review statements | pass-by-pass review record | AT RELEASE |
A.1 · indicator definition, net greenhouse-gas emissions
- Construct
- annual emissions minus land-use removals
- Unit
- Mt CO₂e
- Scope
- calendar year
- Source
- fourth biennial update report5
- Revision
- back-revised in later reports
- Known limits
- the 2020 total used here excludes land use; the net figure of 2,437 Mt is read through press reports
Notes
Numbers are the edition’s reference numbers, so a note reads the same in every chapter. The full list, with every source and its licence, is in Annex C. Annex C, references
- 5Ministry of Environment, Forest and Climate Change (ed.), India’s Fourth Biennial Update Report to the United Nations Framework Convention on Climate Change, including the 2020 national greenhouse-gas inventory. MoEFCC, New Delhi, submitted 30 December 2024. Observation year 2020.back
- 14India Meteorological Department (ed.), Statement on the Climate of India during 2025. Ministry of Earth Sciences, New Delhi, press release of 1 January 2026, published by the World Meteorological Organization 12 January 2026. Observation year 2025.back
- 44Forest Survey of India (ed.), India State of Forest Report 2023. FSI, Dehradun, December 2024. Observation year 2023.back
- 45Central Water Commission (ed.), Reservoir Storage Bulletin (weekly). CWC, New Delhi, 2026. Observation year 2026.back