水安全保障リスク指数
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.
- 水ストレスの水準Indicator · IND · %Total freshwater withdrawn by all sectors as a percentage of total renewable freshwater resources after subtracting environmental flow requirements.
- 1 人あたり再生可能淡水資源総量Indicator · IND · m3/a/personLong-term average internal and external renewable surface and groundwater resources per resident, in cubic metres per year.
- 地下水貯留量の減少Indicator · 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.
- 水利用効率Indicator · IND · USD/m3Gross value added of agriculture, industry and services per cubic metre of water withdrawn by those sectors, at constant 2015 US dollars, weighted by each sector’s share of withdrawals; its change over time is the SDG target measure.
- 安全に管理された飲料水を利用する人口Indicator · 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.
- 安全に管理された衛生施設を利用する人口Indicator · 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.
- 基本的な手洗い設備がある人口Indicator · IND · %Share of the population with a hand-washing facility with soap and water available at home.
- 周辺水質が良好な水域Indicator · IND · %Share of monitored river, lake and groundwater bodies whose measured oxygen, salinity, nitrogen, phosphorus and acidity meet national good-quality targets.
- 安全に処理される排水Indicator · IND · %Share of domestic and industrial wastewater flows that are treated to a level meeting national or local standards before discharge.
- 国外の再生可能水資源への依存率Indicator · IND · %Share of total renewable water resources that originates outside the country, as inflow from upstream countries or shared aquifers.
- 運用中の協力体制がある越境流域の面積Indicator · 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.
- 水安全保障リスク指数Domain 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.
- 人間とシステムの脆弱性Pillar · 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
- 不確実性
- 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.
| 指標 | 単位 | エビデンス | 出典 | 割合 |
|---|---|---|---|---|
水ストレスの水準IND.WAT.stress.water_stress | % | Class B | fao-aquastat, un-sdg-database, wb-wdi | 44.4% |
1 人あたり再生可能淡水資源総量IND.WAT.stress.renewable_water.pc | m3/a/{person} | Class B | fao-aquastat, wb-wdi | 22.2% |
地下水貯留量の減少IND.WAT.stress.groundwater_depletion | mm/a | Class C | nasa-grace-fo, igrac-ggis, national-groundwater-monitoring | 22.2% |
水利用効率IND.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.
| 指標 | 単位 | エビデンス | 出典 | 割合 |
|---|---|---|---|---|
安全に管理された飲料水を利用する人口IND.WAT.access.safely_managed_drinking_water.share | % | Class B | who-unicef-jmp, wb-wdi | 33.3% |
安全に管理された衛生施設を利用する人口IND.WAT.access.safely_managed_sanitation.share | % | Class B | who-unicef-jmp, wb-wdi | 33.3% |
基本的な手洗い設備がある人口IND.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.
| 指標 | 単位 | エビデンス | 出典 | 割合 |
|---|---|---|---|---|
周辺水質が良好な水域IND.WAT.quality.good_ambient_water_quality.share | % | Class B | unep-gems-water, un-sdg-database | 50.0% |
安全に処理される排水IND.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.
| 指標 | 単位 | エビデンス | 出典 | 割合 |
|---|---|---|---|---|
国外の再生可能水資源への依存率IND.WAT.dependence.external_water_dependency | % | Class B | fao-aquastat | 66.7% |
運用中の協力体制がある越境流域の面積IND.WAT.dependence.transboundary_cooperation.share | % | Class B | unece-unesco-sdg652, un-sdg-database | 33.3% |
水
Water availability, stress, access, quality and transboundary dependence.
| Sub-domain | 指標 |
|---|---|
| 水ストレス | 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
| 指標 | 分野 | Sub-domain | 構成要素 | 単位 | レベル | Crosswalks |
|---|---|---|---|---|---|---|
水ストレスの水準IND.WAT.stress.water_stress | WAT | 水ストレス | hazard | % | COUNTRY, ADM1 | SDG 6.4.2 WB_WDI ER.H2O.FWST.ZS |
基準水ストレス・スコア（小流域）IND.WAT.stress.baseline_water_stress | WAT | 水ストレス | hazard | {score} | COUNTRY, ADM1, CITY, GRID, SITE, PORTFOLIO | |
1 人あたり再生可能淡水資源総量IND.WAT.stress.renewable_water.pc | WAT | 水ストレス | hazard | m3/a/{person} | COUNTRY | WB_WDI ER.H2O.INTR.PC |
地下水貯留量の減少IND.WAT.stress.groundwater_depletion | WAT | 水ストレス | hazard | mm/a | COUNTRY, ADM1, GRID | |
水利用効率IND.WAT.stress.water_use_efficiency | WAT | 水ストレス | adaptive capacity | [USD]/m3 | COUNTRY | SDG 6.4.1 WB_WDI ER.GDP.FWTL.M3.KD |
安全に管理された飲料水を利用する人口IND.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 |
少なくとも基本的な飲料水を利用する人口IND.WAT.access.basic_drinking_water.share | WAT | Drinking water and sanitation | vulnerability | % | COUNTRY, ADM1 | WB_WDI SH.H2O.BASW.ZS |
安全に管理された衛生施設を利用する人口IND.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 |
基本的な手洗い設備がある人口IND.WAT.access.basic_handwashing.share | WAT | Drinking water and sanitation | vulnerability | % | COUNTRY, ADM1 | WB_WDI SH.STA.HYGN.ZS SDG 6.2.1 |
周辺水質が良好な水域IND.WAT.quality.good_ambient_water_quality.share | WAT | Water quality | vulnerability | % | COUNTRY, ADM1 | SDG 6.3.2 |
安全に処理される排水IND.WAT.quality.wastewater_safely_treated.share | WAT | Water quality | coping capacity | % | COUNTRY, CITY | SDG 6.3.1 EPI WWT |
国外の再生可能水資源への依存率IND.WAT.dependence.external_water_dependency | WAT | Transboundary dependence | exposure | % | COUNTRY | |
運用中の協力体制がある越境流域の面積IND.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.
- 前回の版
- –
- Range since 2016
- –
- 結合総合
- –
- 結合スコア S
- –
- パルス、直近 1 週間
- –
- Outlook, 12 months
- –
- 手法
- Indicator Standard 1.0 · NXS-GRX 2026
- 抽出
- 1,000
公開済みの値はまだありません。最初の版で、区間の帯と区分の境界とともに履歴がここに描かれます。
Country values
- タイル
/api/v1/public/grix/risk-products/tiles/wat/{z}/{x}/{y}.mvt- 観測キー
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.
Nexus 全体で
Water Nexus · GRF Diplomacy · GRF Climate and Nature Governance.
引用と再利用
See this index in every country profile
Each profile shows this index with its interval and class once released.
ステータス
The Global Risks Index の手法、構造、定義は準備段階の作業草案（2026 年）であり、レビューと意見募集のために配布されているもので、実施を目的としたものではありません。管理されたエビデンスの区切りから版が公表されるまで、値は一切表示されません。公表後の値には、区間、区分、出典、訂正の経路が付されます。シミュレーターは、公表された手法をあなたが選んだ数値で実行するものであり、NXS-GRX の値を表示することはありません。
NXS-GRX ではないもの
NXS-GRX は研究およびリスク分析の情報です。信用格付や ESG 格付ではなく、格付尺度を用いず、金融商品のベンチマークでも、公的統計でも、緊急警報や公式分類でも、助言でもありません。自然人の評価に用いてはなりません。リスククラスは公開された尺度上の区分であり、国や人の順位付けではありません。
機関と情報源
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.
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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.