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| Type: | Resource | |
| Storage: | The size of this resource is 32.9 MB | |
| Created: | Oct 20, 2025 at 1:29 p.m. (UTC) | |
| Last updated: | Dec 19, 2025 at 7:59 p.m. (UTC) | |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
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Abstract
Terminal lakes world-wide are sensitive to climate, posing air quality degradation to populations adjacent to their drying playas. Great Salt Lake (GSL), the eighth largest terminal lake globally, is proximal to the Salt Lake City metropolitan area, yet the groundwater component of its water budget is relatively unconstrained, as true of terminal lakes globally. Direct measurement of hydraulic parameters and water chemistry were made at GSL’s southeastern playa margin in piezometers and retrieved cores to constrain the location and cross-sectional profile of the freshwater-saltwater interface. Groundwater age and recharge elevation were interpreted from tracers analyzed in piezometer samples. Results show that a large body of fresh pressurized groundwater exists underneath a hypersaline lens at depths greater than 9 m below the playa surface, with circular freshwater pipes projecting through the lens in discrete locations. Diffuse upward flow is practically balanced by evapotranspiration demand, and lakeward lateral flux is approximately two orders of magnitude lower than vertical upward flux in the playa. Results demonstrate a mountain-recharge origin with an age since recharge of multiple tens of millennia despite the relatively short lateral distance to the Wasatch Mountain source (20 km), and despite a factor of thousands larger lakeward Darcy flux in the uplands east of the playa. This ancient, pressurized mountain-derived fresh groundwater, while being a relatively minor component of the water budget, may at minimum support mitigation of dust hotspots on the drying playa.
Subject Keywords
Coverage
Spatial
Content
README.txt
Spreadsheet Download Instructions To ensure all spreadsheets function correctly, please follow the steps below: 1. Download all spreadsheets provided in this folder. 2. Save all files in the same local directory (i.e., the same folder on your computer). Do not rename the files. Do not move individual files to different folders. 3. Once all files are saved in the same location, you may open any spreadsheet. Linked references and formulas between files should work automatically. If files are saved in different locations, some links or calculations may not work as intended. If you encounter any issues, please verify that all spreadsheets are stored together in the same folder.
Credits
Funding Agencies
This resource was created using funding from the following sources:
| Agency Name | Award Title | Award Number |
|---|---|---|
| Utah Division of Forestry, Fire and State Lands (FFSL) of the Utah Department of Natural Resources | ||
| Great Salt Lake Commissioners Office |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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