Sanjiangyuan—which literally translates as the “three river source area”—feeds China’s mightiest rivers. The 300,000-square kilometer region, high on western China’s Qinghai-Tibetan plateau, provides a quarter of the Yangtze’s water, almost half of the Yellow River’s, and 10 percent of the Mekong’s.
Crucial as this area is, its environment is deteriorating, with rising snowlines, shrinking lakes, wetland degradation, and reduced runoff. As early as 2001, over 90 percent of Qumarleb county’s wells were found to be empty, while one hundred of Madoi county’s 4077 lakes had dried up.