Dagze Co (Lake) is one of many inland lakes in Tibet, with a present area of 260 km2 (100 square miles). In glacial times, the region was considerably wetter, and lakes were correspondingly much larger. Changes in climate have resulted in greater aridity on the Tibetan Plateau. The numerous concentric rings that circle the lake are fossil shorelines, and attest to the historical presence of a larger, deeper lake.
The image covers an area of 36.4 x 30.5 km, and was acquired by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) aboard NASA’s Terra satellite on October 8, 2001.
In late April 2007, the company in charge of the lakes and reservoirs that make up the Snowy Mountains Hydroelectric Scheme in southern New South Wales reported that lake levels were at 10 percent of capacity, the lowest they had been since the system was built about 50 years ago.