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| Type: | Resource | |
| Storage: | The size of this resource is 1.2 MB | |
| Created: | Aug 19, 2021 at 2:40 p.m. | |
| Last updated: | Aug 19, 2021 at 2:50 p.m. | |
| DOI: | 10.4211/hs.e38890e20a7140df8257d6ee04509e47 | |
| Citation: | See how to cite this resource |
| Sharing Status: | Published |
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| Views: | 660 |
| Downloads: | 4 |
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Abstract
This dataset contains oxygen and hydrogen isotope ratios that were used to detect a hydraulic connection between a sinkhole lake and a karst spring. In karst areas, surface water that flows to a lake can drain through sinkholes in the lakebed to the underlying aquifer, and then flows in karst conduits and through aquifer matrix. At the study site located in northwest Florida, USA, Lake Miccosukee immediately drains into two sinkholes. Results from a dye tracing experiment indicates that lake water discharges at Natural Bridge Spring, a first-magnitude spring 32 km downgradient from the lake. By collecting weekly water samples from the lake, the spring, and a groundwater well 10 m away from the lake during the dry period between October 2019 and January 2020, it was found that, when rainfall effects on isotopic signature in spring water are removed, increased isotope ratios of spring water can be explained by mixing of heavy-isotope-enriched lake water into groundwater, indicating hydraulic connection between the lake and the spring. Such a detection of hydraulic connection at the scale of tens of kilometers and for a first-magnitude spring has not been previously reported in the literature. Based on the isotope ratio data, it was estimated that, during the study period, about 8.5% the spring discharge was the lake water that drained into the lake sinkholes.
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Credits
Funding Agencies
This resource was created using funding from the following sources:
| Agency Name | Award Title | Award Number |
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| National Science Foundation | RAPID: Turning a Lake Sinkhole Event into Natural/Man-Made Tracer Experiments and Data Collection Campaign for Advanced Understanding of Karst Hydrogeology and Solute Transport | 1828827 |
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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