Today the World Water Forum starts in Bali, where world leaders will discuss the sustainability of water resources for a week. To illustrate the issue of water management, we head to Panama. The Panama Canal, one of the world’s major maritime trade routes, has suffered a decline in its water levels ever since drought affected the country last year. As well as reducing traffic through the canal in the short term, the country is looking for long-term solutions to guarantee transit as well as access to water drinking water for the population. This report by Quentin Duval and Matthieu Comin.