Aqueduct 4.0 Water Risk

Aqueduct is a global dataset that provides a comprehensive water risk framework from the World Resources Institute (WRI). It includes indicators such as water stress, water depletion, untreated connected wastewater, and unimproved/no drinking water, grouped into three main categories: (1) physical risk quantity, (2) physical risk quality, and (3) regulatory and reputational risk. The water risk indicators were computed using the PCR-GLOBWB 2 hydrologic model from Utrecht University. Aqueduct 4.0 uses a baseline period of 1979–2019 and future projections from CMIP6 for the periods 2015–2045, 2035–2065, and 2065–2095. The indicators are aggregated into watersheds based on HydroBASINS level 6. For more information, visit the Aqueduct 4.0 Public Documentation website or the Aqueduct 4.0 Technical Note. Dataset Summary Phenomenon Mapped: Water risk Geographic Extent: Global Layer Projection: WGS84 Update Frequency: 3-5 years Visible Scale: This layer preforms well across all scales Source: WRI Aqueduct Data Vintage: April 2023 Publication Date: November 2025 What can you do with this layer? Identify and prioritize geographic areas facing the highest water risks. Combine multiple risk indicators to understand related risks from water stress. Compare current baseline conditions with future projections under different scenarios (i.e. business-as-usual, pessimistic, or optimist) to understand how water risks may change over time. Use the dataset to identify priority locations for implementing actions to manage and reduce water risks. For more details about this layer, please read the Global Water Risk from Aqueduct blog. Data Dictionary Water Stress: Ratio of total water withdrawals to available renewable surface and groundwater supplies. Measures competition for water resources. Water Depletion: Ratio of total water consumption to available renewable water supplies. Measures total water consumption as a share of available resources. Available Blue Water: The total amount of renewable freshwater (surface water and groundwater) available to a sub-basin with upstream consumption removed. Gross Water Demand: The total water withdrawals across all sectors within a sub-basin, including: domestic, agricultural, industrial, power generation, and livestock. Interannual Variability: The average variation in available water supply from year to year, calculated as the coefficient of variation of annual values for each month and each sub-basin. Seasonal Variability: The average variation in available water supply within a single year, calculated as the coefficient of variation across monthly averages over a multi-year period. Groundwater Table Decline: Decline in groundwater table levels measured in centimeters per year. Untreated Connected Wastewater: Domestic wastewater that is not treated before being discharged into the environment. Coastal Eutrophication Potential: Potential for algal blooms and oxygen depletion in coastal waters due to nutrient loading from inland sources. Unimproved/No Drinking Water: Risk to the population due to lack of access to improved drinking water source. Unimproved/No Sanitation: Risk to the population due to lack of access to improved sanitation facilities. Peak RepRisk Country ESG Risk Index: Reputational risk index based on environmental, social, and governance issues in a given country. Climate Scenarios: Business as Usual: Middle of the road (SSP 3 RCP 7.0) Optimistic: Carbon emissions are cut and society is healthy (SSP 1 RCP 2.6) Pessimistic: Carbon emissions rise and society is fragmented (SSP 5 RCP 8.5) Revisions Nov 12, 2025: Official release of feature service offering. Questions? Please leave a comment below if you have a question about this layer, and we will get back to you as soon as possible.Aqueduct是世界资源研究所（World Resources Institute, WRI）推出的全球数据集，提供一套全面的水风险分析框架。该数据集包含水资源压力、水资源耗竭、未经处理的连通废水、未改善/无饮用水等多项指标，分为三大类别：(1) 物理风险（数量维度）、(2) 物理风险（质量维度）、(3) 监管与声誉风险。 本数据集的水风险指标采用乌得勒支大学的PCR-GLOBWB 2水文模型计算生成。Aqueduct 4.0版本的基准时段为1979–2019年，未来情景预测采用耦合模型比对项目第6阶段（Coupled Model Intercomparison Project Phase 6, CMIP6）的模拟结果，覆盖2015–2045、2035–2065及2065–2095三个研究时段。所有指标均基于HydroBASINS六级流域单元进行聚合。如需获取更多信息，请访问Aqueduct 4.0官方文档网站或Aqueduct 4.0技术说明文档。 ### 数据集摘要 映射对象：水风险 地理覆盖范围：全球 图层投影：WGS84 更新频率：每3至5年 可视尺度：该图层在所有尺度下均适配良好 数据来源：世界资源研究所（WRI）Aqueduct数据集 数据版本：2023年4月 发布日期：2025年11月 ### 应用场景 可通过该图层开展以下工作： 1. 识别并优先划定面临最高水风险的地理区域； 2. 整合多类风险指标，全面解析水资源压力相关的各类复合风险； 3. 对比当前基准情景与不同未来情景（常规发展、悲观情景与乐观情景）下的预测结果，研判水风险随时间的变化趋势； 4. 利用该数据集锁定水风险治理与减排行动的优先实施区域。 如需了解该图层的更多细节，请阅读《Aqueduct全球水风险》博客文章。 ### 数据字典 - 水资源压力（Water Stress）：总取水量与可更新地表及地下水供给量的比值，用于衡量区域内水资源竞争程度。 - 水资源耗竭（Water Depletion）：总耗水量与可更新水资源供给量的比值，用于衡量总耗水量占可利用水资源的比例。 - 可用蓝水资源（Available Blue Water）：扣除上游耗水量后，子流域可获取的可再生淡水（地表水与地下水）总量。 - 总需水量（Gross Water Demand）：子流域内各行业的总取水量，涵盖生活、农业、工业、发电及畜牧业用水。 - 年际变异性（Interannual Variability）：可利用水资源供给量的年度平均波动幅度，通过计算多年期内各月及各子流域年度值的变异系数得出。 - 季节变异性（Seasonal Variability）：单一年度内可利用水资源供给量的平均波动幅度，通过计算多年期内月均值的变异系数得出。 - 地下水位下降（Groundwater Table Decline）：以厘米/年为单位的地下水位降幅。 - 未经处理的连通废水（Untreated Connected Wastewater）：未经处理即直接排放至自然环境的生活废水。 - 沿海富营养化潜势（Coastal Eutrophication Potential）：内陆来源的营养物质负荷引发沿海水域藻类爆发与溶解氧耗竭的潜在风险。 - 未改善/无饮用水（Unimproved/No Drinking Water）：因无法获取改善型饮用水水源而对人口造成的健康风险。 - 未改善/无卫生设施（Unimproved/No Sanitation）：因无法获取改善型卫生设施而对人口造成的健康风险。 - 峰值RepRisk国家ESG风险指数（Peak RepRisk Country ESG Risk Index）：基于特定国家环境、社会及治理（Environmental, Social and Governance, ESG）问题构建的声誉风险指数。 - 气候情景（Climate Scenarios）： - 常规发展情景（Business as Usual）：中间路径情景（SSP 3 RCP 7.0） - 乐观情景（Optimistic）：碳排放削减且社会发展健康均衡（SSP 1 RCP 2.6） - 悲观情景（Pessimistic）：碳排放持续上升且社会碎片化割裂（SSP 5 RCP 8.5） ### 修订记录 2025年11月12日修订：正式发布要素服务套件。 如有疑问，请在下方留言，我们将尽快回复您的咨询。