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USGS reports changing flows, bidirectional causeway velocities and lab testing plans for lake nutrients
Summary
USGS scientists said changing lake elevations and winds have produced bidirectional flows through the causeway and curtailed continuous discharge estimates at key monitoring sites; the agency is testing alternative labs and methods for nutrient analyses in hypersaline Great Salt Lake samples.
Christine Ramsey of the U.S. Geological Survey (USGS) updated the group on hydrology, velocities in the causeway reach, inflow totals and ongoing work to secure analytical capacity for nutrient samples from hypersaline Great Salt Lake sites.
Ramsey summarized lake elevations: the overall lake elevation had dropped roughly three feet from spring highs at the time of the meeting and the North Arm was down about seven feet relative to its seasonal high. She briefed monitoring changes at a long‑running causeway reach where acoustic velocity profiles now show frequent reversals and north‑to‑south flow events at depth that began in late August 2024. “With these changing conditions … we can no longer do that,” Ramsey said, referring to continuous,…
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