T53 Groundwater–Surface Water Interactions: Advances in Measurement and Modeling Techniques II
Sunday, 4 November 2012
1:30 PM - 5:30 PM
213BC
COUPLING DIVERSE NEW TECHNIQUES TO FORECAST STREAM/AQUIFER INTERACTIONS
Paper number: T53-6
Program: Technical Sessions
Time: 2:35 PM – 2:50 PM
Authors
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Timothy BeckerUniv of California, Santa Barbara, CA
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Jean MoranCalifornia State University, East Bay Earth and Environmental Sci., Hayward, CA
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Bradley K. EsserLawrence Livermore National Laboratory, Livermore, CA
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Jordan F. ClarkUniv of California, Santa Barbara, CA
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Michael J. SingletonLawrence Livermore National Laboratory, Livermore, CA
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Stephanie H. DiazUniversity of California at Santa Barbara, Santa Barbara, CA
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Ate VisserLawrence Livermore National Laboratory, Livermore, CA
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Scott KobsUniversity of Nevada, Reno, Reno, NV
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Stephanie DeRubeisCalifornia State University, East Bay, Hayward, CA
Abstract
Measurement of groundwater/surface interactions has become an important component of hydrogeology. However, making these measurements remains a challenging and time consuming process. Compounding this is the variety of physical, chemical and thermal methods availalble, and the fact that these techniques are used independently or in isolation. In this work, we combine evolving thermal methods (DTS) with novel introduced tracers and naturally occurring radon in a sub-alpine, managed basin in the Lake Tahoe area. A gaining portion of the stream was instrumented with DTS, during a tracer injection of environmental benign xenon, sulfur hexafluoride and sampling of radon-222 and sulfur-35. In addition, traditional hydrometrics were carried out in order to attempt to quantify groundwater flux into the stream. As far as we know, this is the first time that xenon has been used in a stream setting, and our overall goal is to couple these novel tracer techniques for ecohydrology.