Elements of Water Infrastructure (IMAGE) Proceedings of the National Academy of Sciences Caption These are elements of water infrastructure mapped in this study, showing likely aqueducts, channels, springs and cisterns in relation to possible areas of supply within the city. Credit PNAS Usage Restrictions None License Licensed 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.