Medford, Ore. – New research has uncovered a massive aquifer hidden beneath the snow-covered peaks of the Oregon Cascades, revealing an unexpectedly large source of groundwater that could have significant implications for the region’s water future.
For decades, scientists knew of an aquifer in the Santiam Pass area, nestled between Eugene and Bend. However, recent research has revealed that this underground water reserve is far larger than previously imagined. Researchers now estimate the aquifer’s capacity to be nearly three times that of Lake Mead, one of the largest reservoirs in the United States, which spans parts of Nevada and Arizona.
Leif Karlstrom, a volcanologist and professor of Earth Sciences at the University of Oregon, has been at the forefront of the discovery. According to Karlstrom, the water is “locked up in fractures in the bedrock,” but it remains an active groundwater source that is constantly flowing. “The volume that we found is comparable to large continental lakes; it’s just locked up in the bedrock,” Karlstrom said.
The team, which includes researchers from Oregon State University, Duke University, and the U.S. Forest Service, is currently working to map the full extent of the aquifer, which is thought to lie beneath the volcanic rock formations of the Cascades. Thanks to previous research that laid the groundwork for this discovery, the team has been able to get a clearer understanding of the aquifer’s size and significance.
While the presence of such a vast water resource may not have immediate effects on the region, it could prove vital in the face of ongoing droughts and changing weather patterns. As the Pacific Northwest experiences warmer temperatures and diminished snowpacks, the availability of surface water has become increasingly unpredictable. In light of this, the aquifer could serve as a crucial backup supply for communities and ecosystems in the region.
“We have a tremendous resource in the Cascades, and that’s well known—we take it for granted living up here,” Karlstrom said. The discovery of this aquifer highlights the importance of understanding and managing the hidden water resources that may become more critical as climate change continues to impact the region.
The next steps for the research team involve further exploration and mapping of the aquifer’s extent. The hope is that with a better understanding of this groundwater reserve, local water managers will be better equipped to plan for the future and ensure the sustainability of water resources in the region.
As researchers continue to unlock the secrets of the Cascades’ underground water supply, this discovery stands as a reminder of how much there still is to learn about the natural resources beneath our feet.