Very good lecture, the material was insightful. This is a very good introduction to Civil engineering Students as to the complexity of issues dealing with water. It would be good to have a web location for additional references and data tables to study. I would also like to have some others who could provide insight into this issue of global water supply. These are the types of lectures we need to have during freshman year in order to locate students who identify their self as interested in this issue. Then we need to fund the student and provide them with environments where they can freely study this and related issues.