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Aqueduct Water Risk Atlas - See, map, and analyze current and future strain on global water resources

Measuring, mapping and understanding water risks around the globe. Aqueduct's global water risk mapping tool helps companies, investors, governments, and other users understand where and how water risks and opportunities are emerging worldwide.

The availability of freshwater resources to meet human demands has emerged as a top-tier global issue for both environment and development. However, many decision-makers lack the technical expertise to fully understand hydrological information. In response to growing concerns from private sector actors around water availability, water quality, climate change, and increasing demand, we employed the composite index approach as a robust communication tool to translate hydrological data into intuitive indicators of water- related risks.

WRI grouped 12 indicators into a framework identifying spatial variation in water risks. For 6 of the 12 indicators, they used an ensemble of time series estimators, spatial regression, and a sparse hydrological model to generate novel data sets of water supply and use.

WRI adapted the remaining six indicators from existing publications. They chose aggregation methods to maximize transparency and communicability, and to allow for dynamic weighting to reflect different users’ sensitivities to water-related risks. Currently unable to validate overall index scores because no datasets of water-related losses exist in the public domain. Data availability, specifically for major infrastructure (e.g., inter-basin transfers) and in-situ water quality and river gauge measurements, is the primary constraining factor in model accuracy.

The resulting Aqueduct Water Risk Atlas (Aqueduct) is a publicly available, global database and interactive tool that maps indicators of water-related risks. Aqueduct enables comparison across large geographies to identify regions or assets deserving of closer attention. This paper documents the methodology used to generate the hydrological metrics and indicators in the Aqueduct Water Risk Atlas (see Reig et al. 2013 for explanation of the Aqueduct framework and indicator selection). The data and maps are publicly available so that others may build off this effort.

AQUEDUCT METADATA DOCUMENT AQUEDUCT GLOBAL MAPS 2.1-This document describes the data sources and calculations for the Aqueduct Water Risk Atlas Global Maps.Complete guidelines and processes for data collection,calculations, and mapping techniques are described in the Aqueduct Water Risk Framework documents.

The Aqueduct Global Flood Analyzer is a web-based interactive platform which measures river flood impacts by urban damage, affected GDP, and affected population at the country, state, and river basin scale.

Map: Aqueduct Country and River Basin Rankings

This map shows countries and river basins' average exposure to five of Aqueduct's water risk indicators: baseline water stress, interannual variability, seasonal variability, flood occurrence, and drought severity. Interactive maps

Aqueduct Global Maps 2.1 Data include indicators of water quantity, water variability, water quality, public awareness of water issues, access to water, and ecosystem vulnerability.

The Aqueduct Water Risk Atlas makes use of a framework of 12 global indicators grouped into three categories of risk and one overall score. Aqueduct Global Maps 2.1 include indicators of water quantity, water variability, water quality, public awareness of water issues, access to water, and ecosystem vulnerability. This data updates the previous version with more recent data from the Global Land Data Assimilation System Version 2.