Paper No. 5
Presentation Time: 2:35 PM
COUPLING DIVERSE NEW TECHNIQUES TO FORECAST STREAM/AQUIFER INTERACTIONS (Invited Presentation)
TYLER, Scott W.1, MORAN, Jean E.2, ESSER, Bradley K.3, CLARK, Jordan F.4, SINGLETON, Michael J.5, DIAZ, Stephanie H.6, VISSER, Ate7, KOBS, Scott1, DERUBEIS, Stephanie8 and BECKER, Timothy9, (1)Dept of Geologic Sci and Engr, University of Nevada, Reno, MS 172, Reno, NV 89557, (2)Department of Earth and Environmental Sciences, California State University, East Bay, 25800 Carlos Bee Boulevard, Hayward, CA 94542-3088, (3)Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, 7000 East Avenue, L-231, Livermore, CA 94550, (4)Earth Science, Univ of California, 1006 Webb Hall, Santa Barbara, CA 93106, (5)Chemical Sciences Division, Lawrence Livermore National Laboratory, L-231, 7000 East Avenue, Livermore, CA 94550, (6)Department of Earth Science, University of California at Santa Barbara, 1001 Webb Hall, Santa Barbara, CA 93106, (7)Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, L-231, 7000 East Avenue, Livermore, CA 94550, (8)Department of Earth and Environmental Sciences, California State University, East Bay, 25800 Carlos Bee Blvd, Hayward, CA 94542-3088, (9)Earth Science, Univ of California, 2114 Webb Hall, Santa Barbara, CA 93106, styler@unr.edu
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.
