Scientists have identified a massive groundwater storage system beneath Oregon’s volcanic peaks, holding approximately 81 cubic kilometers of water. This discovery has significant implications for the region, offering a valuable supply during times of drought.
The underground reservoir is situated among relatively young volcanic formations and relies on hot springs, porous rock layers, and minimal faulting to create an intricate network of groundwater pathways. Researchers found that these pathways can extend over half a mile below the surface, influencing temperature readings in drill holes.
This new estimate surpasses past predictions, with the reservoir’s volume comparable to twice the storage capacity of the Columbia River or California’s reservoirs. The discovery highlights the importance of underground aquifers in maintaining steady river and stream flows, especially during dry summer months.
The study also sheds light on volcanic hazards, suggesting potential hotspots where subsurface water could influence eruption styles. Mapping these aquifers may help forecast which volcanoes pose higher risk, depending on how much water sits beneath them.
Climate change is expected to impact groundwater recharge, with consecutive years of low snowfall potentially reducing the aquifer’s replenishment. Scientists hope to refine models that link surface weather patterns with subterranean flows to better understand and manage this hidden resource.
The study’s findings have significant implications for regional water budgets, drought response plans, and habitat protection. As researchers continue to explore and refine their understanding of underground resources, they highlight the importance of preserving these valuable assets in the face of increasing climate uncertainty.
Source: https://www.earth.com/news/scientists-discover-giant-underground-sponge-capable-of-supplying-water-to-rivers-and-cities