Índice de risco de segurança hídrica
0–10 index of water security risk combining scarcity and stress, WASH access, water quality and transboundary dependence; geometric so that good access does not offset severe scarcity.
geometric
equal weights · floor 0.1 where geometric
1,000 draws
normalisation, weights, aggregation, imputation
4 components
11 leaf indicators
75% minimum
modelled share ≤ 20%
From indicators to the composite
The water dimension of a place profile; each sub-index stays visible beside the index.
- Nível de estresse hídricoIndicator · IND · %Total freshwater withdrawn by all sectors as a percentage of total renewable freshwater resources after subtracting environmental flow requirements.
- Recursos renováveis totais de água doce per capitaIndicator · IND · m3/a/personLong-term average internal and external renewable surface and groundwater resources per resident, in cubic metres per year.
- Declínio do armazenamento de águas subterrâneasIndicator · IND · mm/aTrend in terrestrial groundwater storage over at least 15 years, in millimetres of equivalent water height per year (positive = decline), from satellite gravimetry with modelled soil-moisture and surface-water storage removed.
- Eficiência do uso da águaIndicator · IND · USD/m3Gross value added of agriculture, industry and services per cubic metre of water withdrawn by those sectors, at constant 2015 US dollars, weighted by each sector’s share of withdrawals; its change over time is the SDG target measure.
- População que usa água potável gerida com segurançaIndicator · IND · %Share of the population using an improved drinking-water source located on premises, available when needed and free from faecal and priority chemical contamination.
- População que usa saneamento gerido com segurançaIndicator · IND · %Share of the population using an improved sanitation facility not shared with other households, whose excreta are safely disposed of in situ or treated off site.
- População com instalações básicas para lavar as mãosIndicator · IND · %Share of the population with a hand-washing facility with soap and water available at home.
- Corpos d'água com boa qualidade ambiental da águaIndicator · IND · %Share of monitored river, lake and groundwater bodies whose measured oxygen, salinity, nitrogen, phosphorus and acidity meet national good-quality targets.
- Fluxos de águas residuais tratados com segurançaIndicator · IND · %Share of domestic and industrial wastewater flows that are treated to a level meeting national or local standards before discharge.
- Índice de dependência de águas renováveis externasIndicator · IND · %Share of total renewable water resources that originates outside the country, as inflow from upstream countries or shared aquifers.
- Área de bacias transfronteiriças com cooperação operacionalIndicator · IND · %Share of the country’s transboundary river, lake and aquifer basin area covered by an arrangement for water cooperation that is operational.
- Water scarcity and stress sub-indexSub-index · SUB · w 2 · 40.0%Composite of the level of water stress, renewable water per capita, groundwater storage decline and water-use efficiency.
- Drinking water, sanitation and hygiene access sub-indexSub-index · SUB · w 1 · 20.0%Composite of safely managed drinking water, safely managed sanitation and basic hand-washing coverage.
- Water quality sub-indexSub-index · SUB · w 1 · 20.0%Composite of the share of water bodies with good ambient quality and the share of wastewater safely treated.
- Transboundary water dependence sub-indexSub-index · SUB · w 1 · 20.0%Composite of the external water dependency ratio and the share of transboundary basin area under operational cooperation.
- Índice de risco de segurança hídricaDomain index · IDX · geometric0–10 index of water security risk combining scarcity and stress, WASH access, water quality and transboundary dependence; geometric so that good access does not offset severe scarcity.
- Vulnerabilidade humana e dos sistemasPillar · PILLAR · 8 indicesHow susceptible are people, livelihoods, ecosystems and essential systems to harm when a shock arrives?
- NXS-GRX (canonical data, provenance and risk) Composite RiskComposite · COMPOSITE · four pillarsComposite = (HTE × VUL × MSF × LCC)^(1/4), each pillar on 0–10 floored at 0.1; pillar = expert-weighted geometric mean of its domain indices
Run this index’s own aggregation
Set each component, change the aggregation or the weight uncertainty, and watch the interval, the class probability and each component’s contribution respond.
Treatment, normalisation, weighting, aggregation, uncertainty
- Treatment
- WINSORISE
- Outlier rule
- |skew| > 2, kurtosis > 3.5
- Normalisation
- min–max rescaling
- Imputation
- NONE
- Coverage minimum
- 75% of components
- Modelled share cap
- 20% of weight
- Weighting
- equal
- Aggregation
- geometric
- Scale
- 0 to 10
- Incerteza
- 1,000 Monte Carlo runs over normalisation, weights, aggregation, imputation
- Framework basis
- SDG 6; UN-Water framing of water security; OECD/JRC Handbook (2008)
4 components, 11 indicators
Water scarcity and stress sub-index w 2
Composite of the level of water stress, renewable water per capita, groundwater storage decline and water-use efficiency.
| Indicador | Unidade | Evidências | Fontes | Parcela |
|---|---|---|---|---|
Nível de estresse hídricoIND.WAT.stress.water_stress | % | Class B | fao-aquastat, un-sdg-database, wb-wdi | 44.4% |
Recursos renováveis totais de água doce per capitaIND.WAT.stress.renewable_water.pc | m3/a/{person} | Class B | fao-aquastat, wb-wdi | 22.2% |
Declínio do armazenamento de águas subterrâneasIND.WAT.stress.groundwater_depletion | mm/a | Class C | nasa-grace-fo, igrac-ggis, national-groundwater-monitoring | 22.2% |
Eficiência do uso da águaIND.WAT.stress.water_use_efficiency | [USD]/m3 | Class B | fao-aquastat, un-sdg-database, wb-wdi | 11.1% |
Drinking water, sanitation and hygiene access sub-index w 1
Composite of safely managed drinking water, safely managed sanitation and basic hand-washing coverage.
| Indicador | Unidade | Evidências | Fontes | Parcela |
|---|---|---|---|---|
População que usa água potável gerida com segurançaIND.WAT.access.safely_managed_drinking_water.share | % | Class B | who-unicef-jmp, wb-wdi | 33.3% |
População que usa saneamento gerido com segurançaIND.WAT.access.safely_managed_sanitation.share | % | Class B | who-unicef-jmp, wb-wdi | 33.3% |
População com instalações básicas para lavar as mãosIND.WAT.access.basic_handwashing.share | % | Class B | who-unicef-jmp, wb-wdi | 33.3% |
Water quality sub-index w 1
Composite of the share of water bodies with good ambient quality and the share of wastewater safely treated.
| Indicador | Unidade | Evidências | Fontes | Parcela |
|---|---|---|---|---|
Corpos d'água com boa qualidade ambiental da águaIND.WAT.quality.good_ambient_water_quality.share | % | Class B | unep-gems-water, un-sdg-database | 50.0% |
Fluxos de águas residuais tratados com segurançaIND.WAT.quality.wastewater_safely_treated.share | % | Class B | who-un-habitat-wastewater, un-sdg-database | 50.0% |
Transboundary water dependence sub-index w 1
Composite of the external water dependency ratio and the share of transboundary basin area under operational cooperation.
| Indicador | Unidade | Evidências | Fontes | Parcela |
|---|---|---|---|---|
Índice de dependência de águas renováveis externasIND.WAT.dependence.external_water_dependency | % | Class B | fao-aquastat | 66.7% |
Área de bacias transfronteiriças com cooperação operacionalIND.WAT.dependence.transboundary_cooperation.share | % | Class B | unece-unesco-sdg652, un-sdg-database | 33.3% |
Água
Water availability, stress, access, quality and transboundary dependence.
| Sub-domain | Indicadores |
|---|---|
| Estresse hídrico | 5 |
| Drinking water and sanitation | 4 |
| Water quality | 2 |
| Transboundary dependence | 2 |
Anchor frameworks (pillar structure and definitions only): SDG 6; FAO AQUASTAT.
All 13 water indicators
| Indicador | Domínio | Sub-domain | Componente | Unidade | Níveis | Crosswalks |
|---|---|---|---|---|---|---|
Nível de estresse hídricoIND.WAT.stress.water_stress | WAT | Estresse hídrico | hazard | % | COUNTRY, ADM1 | SDG 6.4.2 WB_WDI ER.H2O.FWST.ZS |
Pontuação de estresse hídrico de base (sub-bacia)IND.WAT.stress.baseline_water_stress | WAT | Estresse hídrico | hazard | {score} | COUNTRY, ADM1, CITY, GRID, SITE, PORTFOLIO | |
Recursos renováveis totais de água doce per capitaIND.WAT.stress.renewable_water.pc | WAT | Estresse hídrico | hazard | m3/a/{person} | COUNTRY | WB_WDI ER.H2O.INTR.PC |
Declínio do armazenamento de águas subterrâneasIND.WAT.stress.groundwater_depletion | WAT | Estresse hídrico | hazard | mm/a | COUNTRY, ADM1, GRID | |
Eficiência do uso da águaIND.WAT.stress.water_use_efficiency | WAT | Estresse hídrico | adaptive capacity | [USD]/m3 | COUNTRY | SDG 6.4.1 WB_WDI ER.GDP.FWTL.M3.KD |
População que usa água potável gerida com segurançaIND.WAT.access.safely_managed_drinking_water.share | WAT | Drinking water and sanitation | vulnerability | % | COUNTRY, ADM1, CITY | SDG 6.1.1 WB_WDI SH.H2O.SMDW.ZS EPI UWD |
População que usa pelo menos água potável básicaIND.WAT.access.basic_drinking_water.share | WAT | Drinking water and sanitation | vulnerability | % | COUNTRY, ADM1 | WB_WDI SH.H2O.BASW.ZS |
População que usa saneamento gerido com segurançaIND.WAT.access.safely_managed_sanitation.share | WAT | Drinking water and sanitation | vulnerability | % | COUNTRY, ADM1, CITY | WB_WDI SH.STA.SMSS.ZS SDG 6.2.1 EPI USD |
População com instalações básicas para lavar as mãosIND.WAT.access.basic_handwashing.share | WAT | Drinking water and sanitation | vulnerability | % | COUNTRY, ADM1 | WB_WDI SH.STA.HYGN.ZS SDG 6.2.1 |
Corpos d'água com boa qualidade ambiental da águaIND.WAT.quality.good_ambient_water_quality.share | WAT | Water quality | vulnerability | % | COUNTRY, ADM1 | SDG 6.3.2 |
Fluxos de águas residuais tratados com segurançaIND.WAT.quality.wastewater_safely_treated.share | WAT | Water quality | coping capacity | % | COUNTRY, CITY | SDG 6.3.1 EPI WWT |
Índice de dependência de águas renováveis externasIND.WAT.dependence.external_water_dependency | WAT | Transboundary dependence | exposure | % | COUNTRY | |
Área de bacias transfronteiriças com cooperação operacionalIND.WAT.dependence.transboundary_cooperation.share | WAT | Transboundary dependence | coping capacity | % | COUNTRY | SDG 6.5.2 |
Water security risk index, world
The world reading of this index, every country as a tile and the largest movements since the previous edition.
- Edição anterior
- –
- Range since 2016
- –
- Composto acoplado
- –
- Pontuação de acoplamento S
- –
- Pulse, última semana
- –
- Outlook, 12 months
- –
- Método
- Indicator Standard 1.0 · NXS-GRX 2026
- Sorteios
- 1,000
Ainda não há valores publicados. A primeira edição traça aqui o histórico com a faixa do intervalo e os limites de classe.
Country values
- Blocos
/api/v1/public/grix/risk-products/tiles/wat/{z}/{x}/{y}.mvt- Chave de observação
nis:IDX.WAT.stress.water_security_risk:{ISO3}:{YEAR}:A
Series that read this index
Crosswalks and validity checks
Crosswalks map leaf indicators to source code lists; established indices are used for validity checks, never re-weighted as inputs.
| Code system | Leaf indicators mapped |
|---|---|
SDG | 8 |
WB_WDI | 6 |
EPI | 3 |
Platforms, standards and ways to take part
Field and service platforms of GCRI, GRF and GRA, the Nexus Risk Standards for this domain, learning, working groups and open calls. Every link is a live page.
Em todo o Nexus
Water Nexus · GRF Diplomacy · GRF Climate and Nature Governance.
Citar e reutilizar
See this index in every country profile
Each profile shows this index with its interval and class once released.
Situação
A metodologia, a estrutura e as definições do The Global Risks Index constituem um projeto de trabalho preparatório (2026), divulgado para revisão e comentários e não para implementação. Nenhum valor aparece até que uma edição seja publicada a partir de um corte de evidências governado; os valores passam então a ter intervalos, classes, fontes e o respectivo percurso de correção. Os simuladores executam os métodos publicados sobre números que você escolhe e nunca mostram um valor do NXS-GRX.
O que o NXS-GRX não é
O NXS-GRX é informação de pesquisa e de análise de risco. Não é rating de crédito ou ESG e não usa escala de rating, não é referência para instrumentos financeiros, não é estatística oficial, não é alerta de emergência nem classificação oficial e não é aconselhamento. Não deve ser usado para avaliar pessoas físicas. As classes de risco são faixas em uma escala publicada, nunca classificações de países ou pessoas.
Instituições e fontes
The Nexus Consortium is stewarded by three independent not-for-profit institutions: The Global Centre for Risk and Innovation (GCRI), through GCRI US in Washington, DC and GCRI Canada in Ontario, with GCRI Canada as Lead Institution, Consortium Secretariat and lead contracting organisation; 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.
Cada valor inclui a atribuição das suas fontes, que mantêm as suas próprias licenças. Os nomes externos são citados apenas para fins de interoperabilidade. Os textos de autoria da Nexus destinam-se a ser publicados sob CC BY 4.0.
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.