Charting Our Water Future: Making Water Everyone’s Business

Going through “Charting Our Water Future”, a report by the 2030 water resources group, which, as its name implies, is looking at the future of water supplies in 2030.
One of the views that caught my eye in the report was the gap between how policy makers see the priority of making water investments and evaluating these water investments from an economic viewpoint.

Let’s say a country is facing water shortages. Should it invest in creating more water (desalination, for instance), improving its water infrastructure (investing in groundwater production and pipe networks) or try to get more efficiency gains (e.g. scheduling agricultural irrigation)?