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The Global Risks Index
NXS-GRX · Methods · 26 capabilities

Water risk

Methods for water on the julia and python compute planes.

CapabilitiesAll methods
Page GRX-MTH-WREdition Baseline Edition 2026Evidence close 2026-09-30Values not yet publishedSnapshot 31a753f76
26
capabilities
7
kernel-bound
6
method families
2
standards
01Capabilities

26 capabilities

7 of 26 have a bound kernel or engine. States are shown as the registry records them; a request fails closed wherever an adapter, specialist model or governed data is still missing.

MethodCapability IDStateRuns on
Basin Water Balancerisk.capability.water-risk.basin.water.balance.v1Reference implementationpython · hydrology.water_balance
Precipitation Runoffrisk.capability.water-risk.precipitation.runoff.v1Specialist model requiredpython · hydrology.rational_runoff
Streamflowrisk.capability.water-risk.streamflow.v1Specialist model required—
Groundwaterrisk.capability.water-risk.groundwater.v1Specialist model required—
Reservoir Operationsrisk.capability.water-risk.reservoir.operations.v1Specialist model requiredpython · hydrology.reservoir_balance
Water Droughtrisk.capability.water-risk.water.drought.v1Specialist model requiredpython · water.drought_event_characteristics
Flood Hydrologyrisk.capability.water-risk.flood.hydrology.v1Specialist model requiredpython · hydrology.muskingum
Hydraulic Inundationrisk.capability.water-risk.hydraulic.inundation.v1Specialist model requiredpython · hydraulics.shallow_water_fv_step
Water Qualityrisk.capability.water-risk.water.quality.v1Specialist model required—
Contaminant Transportrisk.capability.water-risk.contaminant.transport.v1Specialist model required—
Water Demandrisk.capability.water-risk.water.demand.v1Specialist model required—
Water Scarcityrisk.capability.water-risk.water.scarcity.v1Specialist model requiredpython · water.baseline_water_stress
Water Accessrisk.capability.water-risk.water.access.v1Specialist model required—
Water Affordabilityrisk.capability.water-risk.water.affordability.v1Specialist model required—
Utility Reliabilityrisk.capability.water-risk.utility.reliability.v1Specialist model required—
Pipe Network Failurerisk.capability.water-risk.pipe.network.failure.v1Specialist model required—
Wastewaterrisk.capability.water-risk.wastewater.v1Specialist model required—
Sanitationrisk.capability.water-risk.sanitation.v1Specialist model required—
Agricultural Waterrisk.capability.water-risk.agricultural.water.v1Specialist model required—
Industrial Waterrisk.capability.water-risk.industrial.water.v1Specialist model required—
Ecosystem Flowrisk.capability.water-risk.ecosystem.flow.v1Specialist model required—
Transboundary Water Dependencyrisk.capability.water-risk.transboundary.water.dependency.v1Specialist model required—
Water Energy Nexusrisk.capability.water-risk.water.energy.nexus.v1Specialist model required—
Water Food Nexusrisk.capability.water-risk.water.food.nexus.v1Specialist model required—
Water Health Riskrisk.capability.water-risk.water.health.risk.v1Specialist model required—
Climate Water Scenariorisk.capability.water-risk.climate.water.scenario.v1Specialist model required—
02Scope

Methods, data and supports

Method families
scientific simulation, time series, extreme value, spatial statistics, optimization, system dynamics
Domains
water
Compute planes
julia, python
Source classes
hydrology, meteorology, groundwater, utility, water-quality, eo
Spatial supports
basin, river, network, grid, facility
Temporal supports
hourly, daily, seasonal, scenario
Reference implementation1
Specialist model required25
03Standards

Standards that govern this fabric

NRS-M13NRS-N1

Propose a method

New methods are registered with a stable ID and a hand-derived golden test.

Contribute

Status

The methodology, structure and definitions of The Global Risks Index are a preparatory working draft (2026), circulated for review and comment and not for implementation. No value appears until an edition is released from a governed evidence cut; values then carry intervals, classes, sources and their correction pathway. Simulators run the published methods on numbers you choose and never show a NXS-GRX value.

What NXS-GRX is not

NXS-GRX is research and risk-analytics information. It is not a credit or ESG rating and uses no rating scale, not a benchmark for financial instruments, not official statistics, not an emergency warning or official classification, and not advice. It must not be used to evaluate natural persons. Risk classes are bands on a published scale, never rankings of countries or people.

Institutions and sources

The Nexus Consortium is stewarded by three independent not-for-profit institutions: GCRI Canada as Lead Institution, Consortium Secretariat and lead contracting organization, The Global Risks Forum (GRF) and The Global Risks Alliance (GRA). Technology, infrastructure and service providers work with the Consortium at arm's length under written agreements, like every other external party in the public-private-planet model, and hold no role in its stewardship.

Every value carries the attribution of its sources, which keep their own licences. External names are cited for interoperability only. Nexus-authored text is intended for CC BY 4.0 on release.

Avis en français

La méthodologie et les définitions du NXS-GRX sont un projet de travail préparatoire (2026). Le NXS-GRX est une information de recherche et d'analyse des risques : ni notation, ni indice de référence financier, ni statistique officielle, ni alerte, ni conseil. Les classes de risque sont des bandes sur une échelle publiée, non des classements.