Water Supply Decline In East Asia

Climate plays role in decline of one of Asia's most critical water resources

Photo from: http://www.writeopinions.com/yangtze-plain

 Source: Kansas State University

Quoting the article:

Climate variability -- rather than the presence of a major dam -- is most likely the primary cause for a water supply decline in East Asia's largest floodplain lake system, according to a Kansas State University researcher.

The fluvial lake system across China's Yangtze River Plain, which serves nearly half a billion people and is a World Wildlife Fund ecoregion, lost about 10 percent of its water area from 2000-2011, according to Jida Wang, assistant professor of geography. Wang and colleagues published their findings for the lake system's decline in the American Geophysical Union's journal Water Resources Research.

"Many people's first intuition is that the culprit must be the Three Gorges Dam because it impounds so much water in the Yangtze River, but our fingerprinting study undeniably shows that the dam is not the decline's primary cause," Wang said. "Climate variability is the predominant driver of this decadal dynamic."

Wang collaborated with Yongwei Sheng, of the University of California, Los Angeles, and Yoshihide Wada, of Austria's International Institute for Applied Systems Analysis. They found that roughly 80 percent of the observed lake decline is the result of simultaneous climate variability closely related to the El Niño-Southern Oscillation, which has caused droughts and flooding in the region.

 
Read full article here: https://www.sciencedaily.com/releases/2017/08/170803103146.htm