“Dongting: A Lake In Flux” is the third in a series of seven films that British photographer/videographer Sean Gallagher is producing as part of his Threatened Waters project about China’s disappearing wetlands.

Lying just off the Yangtze River, Dongting Lake has served as an essential buffer zone in times of flood in the region, receiving excess water from China’s mightiest river and protecting many downstream. In recent decades however, the lake has shrunk dramatically, causing scientists to begin investigating the causes of these changes and their effects on one of the country’s most important lakes.

“Dongting: A Lake In Flux” was awarded first place in the British Press Photographer’s Year 2001 multimedia category. Gallagher’s work is sponsored by the Pulitzer Center on Crisis Reporting.