Scientists recently made an exciting discovery: a freshwater reservoir hidden beneath Utah’s Great Salt Lake. This reservoir could stretch across the entire area of the lake and beyond. Research suggests it lies up to 2.5 miles deep in certain spots, especially where peculiar reed-covered mounds have appeared on the dry lakebed.
Lead researcher Michael Zhdanov from the University of Utah expressed his excitement, saying, “When I first realized that we found this, I was very excited. I think it’s very important.” These mounds have intrigued scientists for years, as the reeds require a lot of fresh water to thrive.
To investigate, Zhdanov and his team conducted an airborne electromagnetic survey over 10 square miles of the lake. They used a helicopter equipped with a device that sent electromagnetic pulses down to map the freshwater reservoirs beneath the surface. Surprisingly, the results showed a large underground layer of fresh water, likely accumulated from snowmelt over thousands or even millions of years.
From their findings published in Scientific Reports, the researchers discovered that this reservoir varies in depth from 330 feet to 2.5 miles. Some impermeable rocks may prevent the freshwater from mixing with the saltwater above. According to Zhdanov, further studies are needed to confirm the extent of the reservoir.
The Great Salt Lake has shrunk significantly over the years. Since 1986, the lake has dwindled by about 22 feet, largely due to human water use, drought, and climate change. This shrinking has resulted in dangerous dust pollution, particularly affecting nearby Salt Lake City. A recent study projected an increase in toxic air pollution in the area, raising concerns for public health.
Zhdanov believes that this newly found freshwater could help mitigate some of the pollution by dampening the dry lakebed. Additionally, it might be tapped for agriculture in the region, although more research will be necessary.
This discovery could also hint at other hidden freshwater reserves across Utah and similar arid areas. “This project shows that airborne geophysics can help identify groundwater reserves in deserts,” Zhdanov noted, expanding our understanding of water resources in challenging environments.
For further insights on the environmental implications of this freshwater reservoir, you can check the full study in Scientific Reports.
