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    Author(s): Elena S.F. Berman; Manish Gupta; Chris Gabrielli; Tina Garland; Jeffrey J. McDonnell
    Date: 2009
    Source: Water Resources Research. 45: W10201. 7 p.
    Publication Series: Scientific Journal (JRNL)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (1.36 MB)

    Description

    A high-frequency, field-deployable liquid water isotope analyzer was developed. The instrument was deployed for 4 contiguous weeks in the H. J. Andrews Experimental Forest Long-term Ecological Research site in western Oregon, where it was used for real-time measurement of the isotope ratios of precipitation and stream water during three large storm events. We were able to document fine-scale changes in rainfall composition and damping effects in the stream channel continuously through these periods. We also performed a rain-on-snow experiment where we sampled leachate from a melting snow core continuously at 2 min intervals for 5 h. These data show remarkable fine-scale patterns of internal rain-snow mixing, patterns that would not have been detected without such high-frequency sampling. These two preliminary applications show proof of concept of the new field analyzer, a device that will ultimately provide hydrologists with insight into water flow dynamics with unprecedented frequency over long time scales.

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    Citation

    Berman, Elena S.F.; Gupta, Manish; Gabrielli, Chris; Garland, Tina; McDonnell, Jeffrey J. 2009. High-frequency field-deployable isotope analyzer for hydrological applications. Water Resources Research. 45:W10201 (doi: 10.1029/2009WR008265, 2009): 7 p.

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    Keywords

    experimental watershed studies, tracers, soil moisture, isotopes, hydrologic processes, water balance

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