Risk calculation (IMAGE) Stockholm University Caption The figure describes the relationship between the risk to water security in each hydrological basin and the governance and environmental conditions in the regions upwind. The relationship between governance (y axis), environmental performance (x axis), the level of risk to water security of each hydrological basin relative to the 379 basins used in the study (colour gradient) and the area of the basin (size of the circle). Governance is calculated as the mean of the five governance indicators; voice accountability, political stability, government effectiveness, regulatory quality and the rule of law (reported by the World Bank). Environmental performance is given by the 40 indicators of the Environmental Performance Index from the Yale Center for Environmental Law and Policy. The dashed red polygonhighlights basins with low levels of upwind governance and environmental performance. Credit Stockholm University Usage Restrictions May be used in connection to the related research. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.