Mapping the Health of the World’s Fifty Major River Basins: “The State of the World’s Rivers interactive mapping database compares ecological health indicators within the world’s 50 major river basins. To start navigating the maps, click to close this dialogue. Then, on the left panel, select among the fourteen ecological indicators to visualize corresponding values in each basin. Scroll down to study a selection of ten basins in greater depth, to visualize the location and attributes of dams, and to visualize sites of high conservation value…The State of the World’s Rivers is an interactive web database that illustrates data on ecological health in the world’s 50 major river basins. Indicators of ecosystem health are grouped into three categories:

• River Fragmentation
• Biodiversity
• Water Quality

Navigating the Database: To start navigating the interactive database, first select one of the fourteen indicators you seek to visualize. As you hover over the indicator name, the right panel will show detailed information about each indicator, including a list of data sources and a discussion of our methodology.”