How to read the graph?
The WPI assesses water poverty from 5 different perspectives: available resources, use of them, access to water (water supply, sanitation and irrigated land), capacity of exploitation, as well as environmental sustainability factors. In each category up to 20 points can be reached (=best situation).
The WPI is a holistic water management tool that is mainly relevant at the community level, but can also be applied at any spatial scale up to the basin or national levels.
Water Monitoring Alliance : indices
http://www.ceh.ac.uk/sections/hrr/documents/WPI4pageleaflet_000.pdf
http://www.ceh.ac.uk/sections/ph/documents/WPIworldmap_2.pdf
