Water flows in mainland Australia’s most important river system, the Murray-Darling Basin, have been declining for the past 50 years. The trend has largely been blamed on water extraction, but our new research shows another factor is also at play.
We investigated why the Darling River, in the northern part of the basin, has experienced devastating periods of low flow, or no flow, since the 1990s. We found it was due to a decrease in rainfall in late autumn, caused by climate change.
The research reveals how climate change is already affecting river flows in the basin, even before water is extracted for farm irrigation and other human uses.
