A team led by researchers at the University of Oxford has created the most complete map of the world's rivers ever made, ...

The study didn’t account for flood defenses such as dikes, levees, dams and drainage systems. One reason, Dr. Rentschler said, is that there isn’t a good global inventory of such structures.

To address this limitation of existing river maps used for water management and flood prediction, the team have developed a new global river network called Global RIver Topology (GRIT), which ...